upgrade web3.js with _extend support

6 files changed, 230 insertions, 2829 deletions

diff --git a/jsre/ethereum_js.go b/jsre/ethereum_js.go
index 5aa673906..8d530a532 100644
--- a/jsre/ethereum_js.go
+++ b/jsre/ethereum_js.go
@@ -801,7 +801,7 @@ module.exports = {
     ETH_SIGNATURE_LENGTH: 4,
     ETH_UNITS: ETH_UNITS,
     ETH_BIGNUMBER_ROUNDING_MODE: { ROUNDING_MODE: BigNumber.ROUND_DOWN },
-    ETH_POLLING_TIMEOUT: 1000,
+    ETH_POLLING_TIMEOUT: 1000/2,
     defaultBlock: 'latest',
     defaultAccount: undefined
 };
@@ -1449,8 +1449,7 @@ web3.eth.filter = function (fil, eventParams, options, formatter) {
         return fil(eventParams, options);
     }
 
-    // what outputLogFormatter? that's wrong
-    //return new Filter(fil, watches.eth(), formatters.outputLogFormatter);
+    // output logs works for blockFilter and pendingTransaction filters?
     return new Filter(fil, watches.eth(), formatter || formatters.outputLogFormatter);
 };
 /*jshint maxparams:3 */
@@ -1507,7 +1506,7 @@ Object.defineProperty(web3.eth, 'defaultAccount', {
 
 
 // EXTEND
-web3.extend = function(extension){
+web3._extend = function(extension){
     /*jshint maxcomplexity: 6 */
 
     if(extension.property && !web3[extension.property])
@@ -1516,10 +1515,10 @@ web3.extend = function(extension){
     setupMethods(web3[extension.property] || web3, extension.methods || []);
     setupProperties(web3[extension.property] || web3, extension.properties || []);
 };
-web3.extend.formatters = formatters;
-web3.extend.utils = utils;
-web3.extend.Method = require('./web3/method');
-web3.extend.Property = require('./web3/property');
+web3._extend.formatters = formatters;
+web3._extend.utils = utils;
+web3._extend.Method = require('./web3/method');
+web3._extend.Property = require('./web3/property');
 
 
 /// setups all api methods
@@ -2428,21 +2427,36 @@ var getOptions = function (options) {
     };
 };
 
-var Filter = function (options, methods, formatter) {
-    var implementation = {};
-    methods.forEach(function (method) {
-        method.attachToObject(implementation);
-    });
-    this.options = getOptions(options);
-    this.implementation = implementation;
-    this.callbacks = [];
-    this.formatter = formatter;
-    this.filterId = this.implementation.newFilter(this.options);
+/**
+Adds the callback and sets up the methods, to iterate over the results.
+
+@method getLogsAtStart
+@param {Object} self
+@param {funciton}
+*/
+var getLogsAtStart = function(self, callback){
+    // call getFilterLogs for the first watch callback start
+    if (!utils.isString(self.options)) {
+        self.get(function (err, messages) {
+            // don't send all the responses to all the watches again... just to self one
+            if (err) {
+                callback(err);
+            }
+
+            messages.forEach(function (message) {
+                callback(null, message);
+            });
+        });
+    }
 };
 
-Filter.prototype.watch = function (callback) {
-    this.callbacks.push(callback);
-    var self = this;
+/**
+Adds the callback and sets up the methods, to iterate over the results.
+
+@method pollFilter
+@param {Object} self
+*/
+var pollFilter = function(self) {
 
     var onMessage = function (error, messages) {
         if (error) {
@@ -2459,29 +2473,55 @@ Filter.prototype.watch = function (callback) {
         });
     };
 
-    // call getFilterLogs on start
-    if (!utils.isString(this.options)) {
-        this.get(function (err, messages) {
-            // don't send all the responses to all the watches again... just to this one
-            if (err) {
-                callback(err);
-            }
+    RequestManager.getInstance().startPolling({
+        method: self.implementation.poll.call,
+        params: [self.filterId],
+    }, self.filterId, onMessage, self.stopWatching.bind(self));
 
-            messages.forEach(function (message) {
-                callback(null, message);
+};
+
+var Filter = function (options, methods, formatter) {
+    var self = this;
+    var implementation = {};
+    methods.forEach(function (method) {
+        method.attachToObject(implementation);
+    });
+    this.options = getOptions(options);
+    this.implementation = implementation;
+    this.callbacks = [];
+    this.pollFilters = [];
+    this.formatter = formatter;
+    this.implementation.newFilter(this.options, function(error, id){
+        if(error) {
+            self.callbacks.forEach(function(callback){
+                callback(error);
             });
-        });
+        } else {
+            self.filterId = id;
+            // get filter logs at start
+            self.callbacks.forEach(function(callback){
+                getLogsAtStart(self, callback);
+            });
+            pollFilter(self);
+        }
+    });
+};
+
+Filter.prototype.watch = function (callback) {
+    this.callbacks.push(callback);
+
+    if(this.filterId) {
+        getLogsAtStart(this, callback);
+        pollFilter(this);
     }
 
-    RequestManager.getInstance().startPolling({
-        method: this.implementation.poll.call,
-        params: [this.filterId],
-    }, this.filterId, onMessage, this.stopWatching.bind(this));
+    return this;
 };
 
 Filter.prototype.stopWatching = function () {
     RequestManager.getInstance().stopPolling(this.filterId);
-    this.implementation.uninstallFilter(this.filterId);
+    // remove filter async
+    this.implementation.uninstallFilter(this.filterId, function(){});
     this.callbacks = [];
 };
 
@@ -2503,6 +2543,8 @@ Filter.prototype.get = function (callback) {
             return self.formatter ? self.formatter(log) : log;
         });
     }
+
+    return this;
 };
 
 module.exports = Filter;
@@ -2600,8 +2642,10 @@ var inputTransactionFormatter = function (options){
  * @returns {Object} transaction
 */
 var outputTransactionFormatter = function (tx){
-    tx.blockNumber = utils.toDecimal(tx.blockNumber);
-    tx.transactionIndex = utils.toDecimal(tx.transactionIndex);
+    if(tx.blockNumber !== null)
+        tx.blockNumber = utils.toDecimal(tx.blockNumber);
+    if(tx.transactionIndex !== null)
+        tx.transactionIndex = utils.toDecimal(tx.transactionIndex);
     tx.nonce = utils.toDecimal(tx.nonce);
     tx.gas = utils.toDecimal(tx.gas);
     tx.gasPrice = utils.toBigNumber(tx.gasPrice);
@@ -2623,7 +2667,8 @@ var outputBlockFormatter = function(block) {
     block.gasUsed = utils.toDecimal(block.gasUsed);
     block.size = utils.toDecimal(block.size);
     block.timestamp = utils.toDecimal(block.timestamp);
-    block.number = utils.toDecimal(block.number);
+    if(block.number !== null)
+        block.number = utils.toDecimal(block.number);
 
     block.difficulty = utils.toBigNumber(block.difficulty);
     block.totalDifficulty = utils.toBigNumber(block.totalDifficulty);
@@ -2650,9 +2695,12 @@ var outputLogFormatter = function(log) {
         return null;
     }
 
-    log.blockNumber = utils.toDecimal(log.blockNumber);
-    log.transactionIndex = utils.toDecimal(log.transactionIndex);
-    log.logIndex = utils.toDecimal(log.logIndex);
+    if(log.blockNumber !== null)
+        log.blockNumber = utils.toDecimal(log.blockNumber);
+    if(log.transactionIndex !== null)
+        log.transactionIndex = utils.toDecimal(log.transactionIndex);
+    if(log.logIndex !== null)
+        log.logIndex = utils.toDecimal(log.logIndex);
 
     return log;
 };
@@ -2754,6 +2802,7 @@ module.exports = {
 var web3 = require('../web3');
 var coder = require('../solidity/coder');
 var utils = require('../utils/utils');
+var formatters = require('./formatters');
 var sha3 = require('../utils/sha3');
 
 /**
@@ -2777,6 +2826,12 @@ SolidityFunction.prototype.extractCallback = function (args) {
     }
 };
 
+SolidityFunction.prototype.extractDefaultBlock = function (args) {
+    if (args.length > this._inputTypes.length && !utils.isObject(args[args.length -1])) {
+        return formatters.inputDefaultBlockNumberFormatter(args.pop()); // modify the args array!
+    }
+};
+
 /**
  * Should be used to create payload from arguments
  *
@@ -2828,15 +2883,17 @@ SolidityFunction.prototype.unpackOutput = function (output) {
 SolidityFunction.prototype.call = function () {
     var args = Array.prototype.slice.call(arguments).filter(function (a) {return a !== undefined; });
     var callback = this.extractCallback(args);
+    var defaultBlock = this.extractDefaultBlock(args);
     var payload = this.toPayload(args);
 
+
     if (!callback) {
-        var output = web3.eth.call(payload);
+        var output = web3.eth.call(payload, defaultBlock);
         return this.unpackOutput(output);
     }
 
     var self = this;
-    web3.eth.call(payload, function (error, output) {
+    web3.eth.call(payload, defaultBlock, function (error, output) {
         callback(error, self.unpackOutput(output));
     });
 };
@@ -2955,7 +3012,7 @@ SolidityFunction.prototype.attachToContract = function (contract) {
 module.exports = SolidityFunction;
 
 
-},{"../solidity/coder":1,"../utils/sha3":6,"../utils/utils":7,"../web3":9}],19:[function(require,module,exports){
+},{"../solidity/coder":1,"../utils/sha3":6,"../utils/utils":7,"../web3":9,"./formatters":17}],19:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -2993,6 +3050,7 @@ HttpProvider.prototype.send = function (payload) {
     var request = new XMLHttpRequest();
 
     request.open('POST', this.host, false);
+    request.setRequestHeader('Content-type','application/json');
 
     try {
         request.send(JSON.stringify(payload));
@@ -3036,6 +3094,7 @@ HttpProvider.prototype.sendAsync = function (payload, callback) {
     };
 
     request.open('POST', this.host, true);
+    request.setRequestHeader('Content-type','application/json');
 
     try {
         request.send(JSON.stringify(payload));
@@ -3721,9 +3780,9 @@ var RequestManager = function (provider) {
     arguments.callee._singletonInstance = this;
 
     this.provider = provider;
-    this.polls = [];
+    this.polls = {};
     this.timeout = null;
-    this.poll();
+    this.isPolling = false;
 };
 
 /**
@@ -3818,6 +3877,11 @@ RequestManager.prototype.sendBatch = function (data, callback) {
  */
 RequestManager.prototype.setProvider = function (p) {
     this.provider = p;
+
+    if(this.provider && !this.isPolling) {
+        this.poll();
+        this.isPolling = true;
+    }
 };
 
 /*jshint maxparams:4 */
@@ -3834,7 +3898,7 @@ RequestManager.prototype.setProvider = function (p) {
  * @todo cleanup number of params
  */
 RequestManager.prototype.startPolling = function (data, pollId, callback, uninstall) {
-    this.polls.push({data: data, id: pollId, callback: callback, uninstall: uninstall});
+    this.polls['poll_'+ pollId] = {data: data, id: pollId, callback: callback, uninstall: uninstall};
 };
 /*jshint maxparams:3 */
 
@@ -3845,24 +3909,21 @@ RequestManager.prototype.startPolling = function (data, pollId, callback, uninst
  * @param {Number} pollId
  */
 RequestManager.prototype.stopPolling = function (pollId) {
-    for (var i = this.polls.length; i--;) {
-        var poll = this.polls[i];
-        if (poll.id === pollId) {
-            this.polls.splice(i, 1);
-        }
-    }
+    delete this.polls['poll_'+ pollId];
 };
 
 /**
- * Should be called to reset polling mechanism of request manager
+ * Should be called to reset the polling mechanism of the request manager
  *
  * @method reset
  */
 RequestManager.prototype.reset = function () {
-    this.polls.forEach(function (poll) {
-        poll.uninstall(poll.id);
-    });
-    this.polls = [];
+    for (var key in this.polls) {
+        if (this.polls.hasOwnProperty(key)) {
+            this.polls[key].uninstall();
+        }
+    }
+    this.polls = {};
 
     if (this.timeout) {
         clearTimeout(this.timeout);
@@ -3877,9 +3938,10 @@ RequestManager.prototype.reset = function () {
  * @method poll
  */
 RequestManager.prototype.poll = function () {
+    /*jshint maxcomplexity: 6 */
     this.timeout = setTimeout(this.poll.bind(this), c.ETH_POLLING_TIMEOUT);
 
-    if (!this.polls.length) {
+    if (this.polls === {}) {
         return;
     }
 
@@ -3888,9 +3950,20 @@ RequestManager.prototype.poll = function () {
         return;
     }
 
-    var payload = Jsonrpc.getInstance().toBatchPayload(this.polls.map(function (data) {
-        return data.data;
-    }));
+    var pollsData = [];
+    var pollsKeys = [];
+    for (var key in this.polls) {
+        if (this.polls.hasOwnProperty(key)) {
+            pollsData.push(this.polls[key].data);
+            pollsKeys.push(key);
+        }
+    }
+
+    if (pollsData.length === 0) {
+        return;
+    }
+
+    var payload = Jsonrpc.getInstance().toBatchPayload(pollsData);
 
     var self = this;
     this.provider.sendAsync(payload, function (error, results) {
@@ -3904,8 +3977,15 @@ RequestManager.prototype.poll = function () {
         }
 
         results.map(function (result, index) {
-            result.callback = self.polls[index].callback;
-            return result;
+            var key = pollsKeys[index];
+            // make sure the filter is still installed after arrival of the request
+            if(self.polls[key]) {
+                result.callback = self.polls[key].callback;
+                return result;
+            } else
+                return false;
+        }).filter(function (result) {
+            return (!result) ? false : true;
         }).filter(function (result) {
             var valid = Jsonrpc.getInstance().isValidResponse(result);
             if (!valid) {
@@ -4121,11 +4201,11 @@ var eth = function () {
 
         switch(type) {
             case 'latest':
-                args.pop();
+                args.shift();
                 this.params = 0;
                 return 'eth_newBlockFilter';
             case 'pending':
-                args.pop();
+                args.shift();
                 this.params = 0;
                 return 'eth_newPendingTransactionFilter';
             default:
@@ -5583,2691 +5663,12 @@ module.exports = {
 
 }));
 },{"./core":32}],"bignumber.js":[function(require,module,exports){
-/*! bignumber.js v2.0.7 https://github.com/MikeMcl/bignumber.js/LICENCE */
-
-;(function (global) {
-    'use strict';
-
-    /*
-      bignumber.js v2.0.7
-      A JavaScript library for arbitrary-precision arithmetic.
-      https://github.com/MikeMcl/bignumber.js
-      Copyright (c) 2015 Michael Mclaughlin <M8ch88l@gmail.com>
-      MIT Expat Licence
-    */
-
-
-    var BigNumber, crypto, parseNumeric,
-        isNumeric = /^-?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i,
-        mathceil = Math.ceil,
-        mathfloor = Math.floor,
-        notBool = ' not a boolean or binary digit',
-        roundingMode = 'rounding mode',
-        tooManyDigits = 'number type has more than 15 significant digits',
-        ALPHABET = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_',
-        BASE = 1e14,
-        LOG_BASE = 14,
-        MAX_SAFE_INTEGER = 0x1fffffffffffff,         // 2^53 - 1
-        // MAX_INT32 = 0x7fffffff,                   // 2^31 - 1
-        POWS_TEN = [1, 10, 100, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11, 1e12, 1e13],
-        SQRT_BASE = 1e7,
-
-        /*
-         * The limit on the value of DECIMAL_PLACES, TO_EXP_NEG, TO_EXP_POS, MIN_EXP, MAX_EXP, and
-         * the arguments to toExponential, toFixed, toFormat, and toPrecision, beyond which an
-         * exception is thrown (if ERRORS is true).
-         */
-        MAX = 1E9;                                   // 0 to MAX_INT32
-
-
-    /*
-     * Create and return a BigNumber constructor.
-     */
-    function another(configObj) {
-        var div,
-
-            // id tracks the caller function, so its name can be included in error messages.
-            id = 0,
-            P = BigNumber.prototype,
-            ONE = new BigNumber(1),
-
-
-            /********************************* EDITABLE DEFAULTS **********************************/
-
-
-            /*
-             * The default values below must be integers within the inclusive ranges stated.
-             * The values can also be changed at run-time using BigNumber.config.
-             */
-
-            // The maximum number of decimal places for operations involving division.
-            DECIMAL_PLACES = 20,                     // 0 to MAX
-
-            /*
-             * The rounding mode used when rounding to the above decimal places, and when using
-             * toExponential, toFixed, toFormat and toPrecision, and round (default value).
-             * UP         0 Away from zero.
-             * DOWN       1 Towards zero.
-             * CEIL       2 Towards +Infinity.
-             * FLOOR      3 Towards -Infinity.
-             * HALF_UP    4 Towards nearest neighbour. If equidistant, up.
-             * HALF_DOWN  5 Towards nearest neighbour. If equidistant, down.
-             * HALF_EVEN  6 Towards nearest neighbour. If equidistant, towards even neighbour.
-             * HALF_CEIL  7 Towards nearest neighbour. If equidistant, towards +Infinity.
-             * HALF_FLOOR 8 Towards nearest neighbour. If equidistant, towards -Infinity.
-             */
-            ROUNDING_MODE = 4,                       // 0 to 8
-
-            // EXPONENTIAL_AT : [TO_EXP_NEG , TO_EXP_POS]
-
-            // The exponent value at and beneath which toString returns exponential notation.
-            // Number type: -7
-            TO_EXP_NEG = -7,                         // 0 to -MAX
-
-            // The exponent value at and above which toString returns exponential notation.
-            // Number type: 21
-            TO_EXP_POS = 21,                         // 0 to MAX
-
-            // RANGE : [MIN_EXP, MAX_EXP]
-
-            // The minimum exponent value, beneath which underflow to zero occurs.
-            // Number type: -324  (5e-324)
-            MIN_EXP = -1e7,                          // -1 to -MAX
-
-            // The maximum exponent value, above which overflow to Infinity occurs.
-            // Number type:  308  (1.7976931348623157e+308)
-            // For MAX_EXP > 1e7, e.g. new BigNumber('1e100000000').plus(1) may be slow.
-            MAX_EXP = 1e7,                           // 1 to MAX
-
-            // Whether BigNumber Errors are ever thrown.
-            ERRORS = true,                           // true or false
-
-            // Change to intValidatorNoErrors if ERRORS is false.
-            isValidInt = intValidatorWithErrors,     // intValidatorWithErrors/intValidatorNoErrors
-
-            // Whether to use cryptographically-secure random number generation, if available.
-            CRYPTO = false,                          // true or false
-
-            /*
-             * The modulo mode used when calculating the modulus: a mod n.
-             * The quotient (q = a / n) is calculated according to the corresponding rounding mode.
-             * The remainder (r) is calculated as: r = a - n * q.
-             *
-             * UP        0 The remainder is positive if the dividend is negative, else is negative.
-             * DOWN      1 The remainder has the same sign as the dividend.
-             *             This modulo mode is commonly known as 'truncated division' and is
-             *             equivalent to (a % n) in JavaScript.
-             * FLOOR     3 The remainder has the same sign as the divisor (Python %).
-             * HALF_EVEN 6 This modulo mode implements the IEEE 754 remainder function.
-             * EUCLID    9 Euclidian division. q = sign(n) * floor(a / abs(n)).
-             *             The remainder is always positive.
-             *
-             * The truncated division, floored division, Euclidian division and IEEE 754 remainder
-             * modes are commonly used for the modulus operation.
-             * Although the other rounding modes can also be used, they may not give useful results.
-             */
-            MODULO_MODE = 1,                         // 0 to 9
-
-            // The maximum number of significant digits of the result of the toPower operation.
-            // If POW_PRECISION is 0, there will be unlimited significant digits.
-            POW_PRECISION = 100,                     // 0 to MAX
-
-            // The format specification used by the BigNumber.prototype.toFormat method.
-            FORMAT = {
-                decimalSeparator: '.',
-                groupSeparator: ',',
-                groupSize: 3,
-                secondaryGroupSize: 0,
-                fractionGroupSeparator: '\xA0',      // non-breaking space
-                fractionGroupSize: 0
-            };
-
-
-        /******************************************************************************************/
-
-
-        // CONSTRUCTOR
-
-
-        /*
-         * The BigNumber constructor and exported function.
-         * Create and return a new instance of a BigNumber object.
-         *
-         * n {number|string|BigNumber} A numeric value.
-         * [b] {number} The base of n. Integer, 2 to 64 inclusive.
-         */
-        function BigNumber( n, b ) {
-            var c, e, i, num, len, str,
-                x = this;
-
-            // Enable constructor usage without new.
-            if ( !( x instanceof BigNumber ) ) {
-
-                // 'BigNumber() constructor call without new: {n}'
-                if (ERRORS) raise( 26, 'constructor call without new', n );
-                return new BigNumber( n, b );
-            }
-
-            // 'new BigNumber() base not an integer: {b}'
-            // 'new BigNumber() base out of range: {b}'
-            if ( b == null || !isValidInt( b, 2, 64, id, 'base' ) ) {
-
-                // Duplicate.
-                if ( n instanceof BigNumber ) {
-                    x.s = n.s;
-                    x.e = n.e;
-                    x.c = ( n = n.c ) ? n.slice() : n;
-                    id = 0;
-                    return;
-                }
-
-                if ( ( num = typeof n == 'number' ) && n * 0 == 0 ) {
-                    x.s = 1 / n < 0 ? ( n = -n, -1 ) : 1;
-
-                    // Fast path for integers.
-                    if ( n === ~~n ) {
-                        for ( e = 0, i = n; i >= 10; i /= 10, e++ );
-                        x.e = e;
-                        x.c = [n];
-                        id = 0;
-                        return;
-                    }
-
-                    str = n + '';
-                } else {
-                    if ( !isNumeric.test( str = n + '' ) ) return parseNumeric( x, str, num );
-                    x.s = str.charCodeAt(0) === 45 ? ( str = str.slice(1), -1 ) : 1;
-                }
-            } else {
-                b = b | 0;
-                str = n + '';
-
-                // Ensure return value is rounded to DECIMAL_PLACES as with other bases.
-                // Allow exponential notation to be used with base 10 argument.
-                if ( b == 10 ) {
-                    x = new BigNumber( n instanceof BigNumber ? n : str );
-                    return round( x, DECIMAL_PLACES + x.e + 1, ROUNDING_MODE );
-                }
-
-                // Avoid potential interpretation of Infinity and NaN as base 44+ values.
-                // Any number in exponential form will fail due to the [Ee][+-].
-                if ( ( num = typeof n == 'number' ) && n * 0 != 0 ||
-                  !( new RegExp( '^-?' + ( c = '[' + ALPHABET.slice( 0, b ) + ']+' ) +
-                    '(?:\\.' + c + ')?$',b < 37 ? 'i' : '' ) ).test(str) ) {
-                    return parseNumeric( x, str, num, b );
-                }
-
-                if (num) {
-                    x.s = 1 / n < 0 ? ( str = str.slice(1), -1 ) : 1;
-
-                    if ( ERRORS && str.replace( /^0\.0*|\./, '' ).length > 15 ) {
-
-                        // 'new BigNumber() number type has more than 15 significant digits: {n}'
-                        raise( id, tooManyDigits, n );
-                    }
-
-                    // Prevent later check for length on converted number.
-                    num = false;
-                } else {
-                    x.s = str.charCodeAt(0) === 45 ? ( str = str.slice(1), -1 ) : 1;
-                }
-
-                str = convertBase( str, 10, b, x.s );
-            }
-
-            // Decimal point?
-            if ( ( e = str.indexOf('.') ) > -1 ) str = str.replace( '.', '' );
-
-            // Exponential form?
-            if ( ( i = str.search( /e/i ) ) > 0 ) {
-
-                // Determine exponent.
-                if ( e < 0 ) e = i;
-                e += +str.slice( i + 1 );
-                str = str.substring( 0, i );
-            } else if ( e < 0 ) {
-
-                // Integer.
-                e = str.length;
-            }
-
-            // Determine leading zeros.
-            for ( i = 0; str.charCodeAt(i) === 48; i++ );
-
-            // Determine trailing zeros.
-            for ( len = str.length; str.charCodeAt(--len) === 48; );
-            str = str.slice( i, len + 1 );
-
-            if (str) {
-                len = str.length;
-
-                // Disallow numbers with over 15 significant digits if number type.
-                // 'new BigNumber() number type has more than 15 significant digits: {n}'
-                if ( num && ERRORS && len > 15 ) raise( id, tooManyDigits, x.s * n );
-
-                e = e - i - 1;
-
-                 // Overflow?
-                if ( e > MAX_EXP ) {
-
-                    // Infinity.
-                    x.c = x.e = null;
-
-                // Underflow?
-                } else if ( e < MIN_EXP ) {
-
-                    // Zero.
-                    x.c = [ x.e = 0 ];
-                } else {
-                    x.e = e;
-                    x.c = [];
-
-                    // Transform base
-
-                    // e is the base 10 exponent.
-                    // i is where to slice str to get the first element of the coefficient array.
-                    i = ( e + 1 ) % LOG_BASE;
-                    if ( e < 0 ) i += LOG_BASE;
-
-                    if ( i < len ) {
-                        if (i) x.c.push( +str.slice( 0, i ) );
-
-                        for ( len -= LOG_BASE; i < len; ) {
-                            x.c.push( +str.slice( i, i += LOG_BASE ) );
-                        }
-
-                        str = str.slice(i);
-                        i = LOG_BASE - str.length;
-                    } else {
-                        i -= len;
-                    }
-
-                    for ( ; i--; str += '0' );
-                    x.c.push( +str );
-                }
-            } else {
-
-                // Zero.
-                x.c = [ x.e = 0 ];
-            }
-
-            id = 0;
-        }
-
-
-        // CONSTRUCTOR PROPERTIES
-
-
-        BigNumber.another = another;
-
-        BigNumber.ROUND_UP = 0;
-        BigNumber.ROUND_DOWN = 1;
-        BigNumber.ROUND_CEIL = 2;
-        BigNumber.ROUND_FLOOR = 3;
-        BigNumber.ROUND_HALF_UP = 4;
-        BigNumber.ROUND_HALF_DOWN = 5;
-        BigNumber.ROUND_HALF_EVEN = 6;
-        BigNumber.ROUND_HALF_CEIL = 7;
-        BigNumber.ROUND_HALF_FLOOR = 8;
-        BigNumber.EUCLID = 9;
-
-
-        /*
-         * Configure infrequently-changing library-wide settings.
-         *
-         * Accept an object or an argument list, with one or many of the following properties or
-         * parameters respectively:
-         *
-         *   DECIMAL_PLACES  {number}  Integer, 0 to MAX inclusive
-         *   ROUNDING_MODE   {number}  Integer, 0 to 8 inclusive
-         *   EXPONENTIAL_AT  {number|number[]}  Integer, -MAX to MAX inclusive or
-         *                                      [integer -MAX to 0 incl., 0 to MAX incl.]
-         *   RANGE           {number|number[]}  Non-zero integer, -MAX to MAX inclusive or
-         *                                      [integer -MAX to -1 incl., integer 1 to MAX incl.]
-         *   ERRORS          {boolean|number}   true, false, 1 or 0
-         *   CRYPTO          {boolean|number}   true, false, 1 or 0
-         *   MODULO_MODE     {number}           0 to 9 inclusive
-         *   POW_PRECISION   {number}           0 to MAX inclusive
-         *   FORMAT          {object}           See BigNumber.prototype.toFormat
-         *      decimalSeparator       {string}
-         *      groupSeparator         {string}
-         *      groupSize              {number}
-         *      secondaryGroupSize     {number}
-         *      fractionGroupSeparator {string}
-         *      fractionGroupSize      {number}
-         *
-         * (The values assigned to the above FORMAT object properties are not checked for validity.)
-         *
-         * E.g.
-         * BigNumber.config(20, 4) is equivalent to
-         * BigNumber.config({ DECIMAL_PLACES : 20, ROUNDING_MODE : 4 })
-         *
-         * Ignore properties/parameters set to null or undefined.
-         * Return an object with the properties current values.
-         */
-        BigNumber.config = function () {
-            var v, p,
-                i = 0,
-                r = {},
-                a = arguments,
-                o = a[0],
-                has = o && typeof o == 'object'
-                  ? function () { if ( o.hasOwnProperty(p) ) return ( v = o[p] ) != null; }
-                  : function () { if ( a.length > i ) return ( v = a[i++] ) != null; };
-
-            // DECIMAL_PLACES {number} Integer, 0 to MAX inclusive.
-            // 'config() DECIMAL_PLACES not an integer: {v}'
-            // 'config() DECIMAL_PLACES out of range: {v}'
-            if ( has( p = 'DECIMAL_PLACES' ) && isValidInt( v, 0, MAX, 2, p ) ) {
-                DECIMAL_PLACES = v | 0;
-            }
-            r[p] = DECIMAL_PLACES;
-
-            // ROUNDING_MODE {number} Integer, 0 to 8 inclusive.
-            // 'config() ROUNDING_MODE not an integer: {v}'
-            // 'config() ROUNDING_MODE out of range: {v}'
-            if ( has( p = 'ROUNDING_MODE' ) && isValidInt( v, 0, 8, 2, p ) ) {
-                ROUNDING_MODE = v | 0;
-            }
-            r[p] = ROUNDING_MODE;
-
-            // EXPONENTIAL_AT {number|number[]}
-            // Integer, -MAX to MAX inclusive or [integer -MAX to 0 inclusive, 0 to MAX inclusive].
-            // 'config() EXPONENTIAL_AT not an integer: {v}'
-            // 'config() EXPONENTIAL_AT out of range: {v}'
-            if ( has( p = 'EXPONENTIAL_AT' ) ) {
-
-                if ( isArray(v) ) {
-                    if ( isValidInt( v[0], -MAX, 0, 2, p ) && isValidInt( v[1], 0, MAX, 2, p ) ) {
-                        TO_EXP_NEG = v[0] | 0;
-                        TO_EXP_POS = v[1] | 0;
-                    }
-                } else if ( isValidInt( v, -MAX, MAX, 2, p ) ) {
-                    TO_EXP_NEG = -( TO_EXP_POS = ( v < 0 ? -v : v ) | 0 );
-                }
-            }
-            r[p] = [ TO_EXP_NEG, TO_EXP_POS ];
-
-            // RANGE {number|number[]} Non-zero integer, -MAX to MAX inclusive or
-            // [integer -MAX to -1 inclusive, integer 1 to MAX inclusive].
-            // 'config() RANGE not an integer: {v}'
-            // 'config() RANGE cannot be zero: {v}'
-            // 'config() RANGE out of range: {v}'
-            if ( has( p = 'RANGE' ) ) {
-
-                if ( isArray(v) ) {
-                    if ( isValidInt( v[0], -MAX, -1, 2, p ) && isValidInt( v[1], 1, MAX, 2, p ) ) {
-                        MIN_EXP = v[0] | 0;
-                        MAX_EXP = v[1] | 0;
-                    }
-                } else if ( isValidInt( v, -MAX, MAX, 2, p ) ) {
-                    if ( v | 0 ) MIN_EXP = -( MAX_EXP = ( v < 0 ? -v : v ) | 0 );
-                    else if (ERRORS) raise( 2, p + ' cannot be zero', v );
-                }
-            }
-            r[p] = [ MIN_EXP, MAX_EXP ];
-
-            // ERRORS {boolean|number} true, false, 1 or 0.
-            // 'config() ERRORS not a boolean or binary digit: {v}'
-            if ( has( p = 'ERRORS' ) ) {
-
-                if ( v === !!v || v === 1 || v === 0 ) {
-                    id = 0;
-                    isValidInt = ( ERRORS = !!v ) ? intValidatorWithErrors : intValidatorNoErrors;
-                } else if (ERRORS) {
-                    raise( 2, p + notBool, v );
-                }
-            }
-            r[p] = ERRORS;
-
-            // CRYPTO {boolean|number} true, false, 1 or 0.
-            // 'config() CRYPTO not a boolean or binary digit: {v}'
-            // 'config() crypto unavailable: {crypto}'
-            if ( has( p = 'CRYPTO' ) ) {
-
-                if ( v === !!v || v === 1 || v === 0 ) {
-                    CRYPTO = !!( v && crypto && typeof crypto == 'object' );
-                    if ( v && !CRYPTO && ERRORS ) raise( 2, 'crypto unavailable', crypto );
-                } else if (ERRORS) {
-                    raise( 2, p + notBool, v );
-                }
-            }
-            r[p] = CRYPTO;
-
-            // MODULO_MODE {number} Integer, 0 to 9 inclusive.
-            // 'config() MODULO_MODE not an integer: {v}'
-            // 'config() MODULO_MODE out of range: {v}'
-            if ( has( p = 'MODULO_MODE' ) && isValidInt( v, 0, 9, 2, p ) ) {
-                MODULO_MODE = v | 0;
-            }
-            r[p] = MODULO_MODE;
-
-            // POW_PRECISION {number} Integer, 0 to MAX inclusive.
-            // 'config() POW_PRECISION not an integer: {v}'
-            // 'config() POW_PRECISION out of range: {v}'
-            if ( has( p = 'POW_PRECISION' ) && isValidInt( v, 0, MAX, 2, p ) ) {
-                POW_PRECISION = v | 0;
-            }
-            r[p] = POW_PRECISION;
-
-            // FORMAT {object}
-            // 'config() FORMAT not an object: {v}'
-            if ( has( p = 'FORMAT' ) ) {
-
-                if ( typeof v == 'object' ) {
-                    FORMAT = v;
-                } else if (ERRORS) {
-                    raise( 2, p + ' not an object', v );
-                }
-            }
-            r[p] = FORMAT;
-
-            return r;
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the maximum of the arguments.
-         *
-         * arguments {number|string|BigNumber}
-         */
-        BigNumber.max = function () { return maxOrMin( arguments, P.lt ); };
-
-
-        /*
-         * Return a new BigNumber whose value is the minimum of the arguments.
-         *
-         * arguments {number|string|BigNumber}
-         */
-        BigNumber.min = function () { return maxOrMin( arguments, P.gt ); };
-
-
-        /*
-         * Return a new BigNumber with a random value equal to or greater than 0 and less than 1,
-         * and with dp, or DECIMAL_PLACES if dp is omitted, decimal places (or less if trailing
-         * zeros are produced).
-         *
-         * [dp] {number} Decimal places. Integer, 0 to MAX inclusive.
-         *
-         * 'random() decimal places not an integer: {dp}'
-         * 'random() decimal places out of range: {dp}'
-         * 'random() crypto unavailable: {crypto}'
-         */
-        BigNumber.random = (function () {
-            var pow2_53 = 0x20000000000000;
-
-            // Return a 53 bit integer n, where 0 <= n < 9007199254740992.
-            // Check if Math.random() produces more than 32 bits of randomness.
-            // If it does, assume at least 53 bits are produced, otherwise assume at least 30 bits.
-            // 0x40000000 is 2^30, 0x800000 is 2^23, 0x1fffff is 2^21 - 1.
-            var random53bitInt = (Math.random() * pow2_53) & 0x1fffff
-              ? function () { return mathfloor( Math.random() * pow2_53 ); }
-              : function () { return ((Math.random() * 0x40000000 | 0) * 0x800000) +
-                  (Math.random() * 0x800000 | 0); };
-
-            return function (dp) {
-                var a, b, e, k, v,
-                    i = 0,
-                    c = [],
-                    rand = new BigNumber(ONE);
-
-                dp = dp == null || !isValidInt( dp, 0, MAX, 14 ) ? DECIMAL_PLACES : dp | 0;
-                k = mathceil( dp / LOG_BASE );
-
-                if (CRYPTO) {
-
-                    // Browsers supporting crypto.getRandomValues.
-                    if ( crypto && crypto.getRandomValues ) {
-
-                        a = crypto.getRandomValues( new Uint32Array( k *= 2 ) );
-
-                        for ( ; i < k; ) {
-
-                            // 53 bits:
-                            // ((Math.pow(2, 32) - 1) * Math.pow(2, 21)).toString(2)
-                            // 11111 11111111 11111111 11111111 11100000 00000000 00000000
-                            // ((Math.pow(2, 32) - 1) >>> 11).toString(2)
-                            //                                     11111 11111111 11111111
-                            // 0x20000 is 2^21.
-                            v = a[i] * 0x20000 + (a[i + 1] >>> 11);
-
-                            // Rejection sampling:
-                            // 0 <= v < 9007199254740992
-                            // Probability that v >= 9e15, is
-                            // 7199254740992 / 9007199254740992 ~= 0.0008, i.e. 1 in 1251
-                            if ( v >= 9e15 ) {
-                                b = crypto.getRandomValues( new Uint32Array(2) );
-                                a[i] = b[0];
-                                a[i + 1] = b[1];
-                            } else {
-
-                                // 0 <= v <= 8999999999999999
-                                // 0 <= (v % 1e14) <= 99999999999999
-                                c.push( v % 1e14 );
-                                i += 2;
-                            }
-                        }
-                        i = k / 2;
-
-                    // Node.js supporting crypto.randomBytes.
-                    } else if ( crypto && crypto.randomBytes ) {
-
-                        // buffer
-                        a = crypto.randomBytes( k *= 7 );
-
-                        for ( ; i < k; ) {
-
-                            // 0x1000000000000 is 2^48, 0x10000000000 is 2^40
-                            // 0x100000000 is 2^32, 0x1000000 is 2^24
-                            // 11111 11111111 11111111 11111111 11111111 11111111 11111111
-                            // 0 <= v < 9007199254740992
-                            v = ( ( a[i] & 31 ) * 0x1000000000000 ) + ( a[i + 1] * 0x10000000000 ) +
-                                  ( a[i + 2] * 0x100000000 ) + ( a[i + 3] * 0x1000000 ) +
-                                  ( a[i + 4] << 16 ) + ( a[i + 5] << 8 ) + a[i + 6];
-
-                            if ( v >= 9e15 ) {
-                                crypto.randomBytes(7).copy( a, i );
-                            } else {
-
-                                // 0 <= (v % 1e14) <= 99999999999999
-                                c.push( v % 1e14 );
-                                i += 7;
-                            }
-                        }
-                        i = k / 7;
-                    } else if (ERRORS) {
-                        raise( 14, 'crypto unavailable', crypto );
-                    }
-                }
-
-                // Use Math.random: CRYPTO is false or crypto is unavailable and ERRORS is false.
-                if (!i) {
-
-                    for ( ; i < k; ) {
-                        v = random53bitInt();
-                        if ( v < 9e15 ) c[i++] = v % 1e14;
-                    }
-                }
-
-                k = c[--i];
-                dp %= LOG_BASE;
-
-                // Convert trailing digits to zeros according to dp.
-                if ( k && dp ) {
-                    v = POWS_TEN[LOG_BASE - dp];
-                    c[i] = mathfloor( k / v ) * v;
-                }
-
-                // Remove trailing elements which are zero.
-                for ( ; c[i] === 0; c.pop(), i-- );
-
-                // Zero?
-                if ( i < 0 ) {
-                    c = [ e = 0 ];
-                } else {
-
-                    // Remove leading elements which are zero and adjust exponent accordingly.
-                    for ( e = -1 ; c[0] === 0; c.shift(), e -= LOG_BASE);
-
-                    // Count the digits of the first element of c to determine leading zeros, and...
-                    for ( i = 1, v = c[0]; v >= 10; v /= 10, i++);
-
-                    // adjust the exponent accordingly.
-                    if ( i < LOG_BASE ) e -= LOG_BASE - i;
-                }
-
-                rand.e = e;
-                rand.c = c;
-                return rand;
-            };
-        })();
-
-
-        // PRIVATE FUNCTIONS
-
-
-        // Convert a numeric string of baseIn to a numeric string of baseOut.
-        function convertBase( str, baseOut, baseIn, sign ) {
-            var d, e, k, r, x, xc, y,
-                i = str.indexOf( '.' ),
-                dp = DECIMAL_PLACES,
-                rm = ROUNDING_MODE;
-
-            if ( baseIn < 37 ) str = str.toLowerCase();
-
-            // Non-integer.
-            if ( i >= 0 ) {
-                k = POW_PRECISION;
-
-                // Unlimited precision.
-                POW_PRECISION = 0;
-                str = str.replace( '.', '' );
-                y = new BigNumber(baseIn);
-                x = y.pow( str.length - i );
-                POW_PRECISION = k;
-
-                // Convert str as if an integer, then restore the fraction part by dividing the
-                // result by its base raised to a power.
-                y.c = toBaseOut( toFixedPoint( coeffToString( x.c ), x.e ), 10, baseOut );
-                y.e = y.c.length;
-            }
-
-            // Convert the number as integer.
-            xc = toBaseOut( str, baseIn, baseOut );
-            e = k = xc.length;
-
-            // Remove trailing zeros.
-            for ( ; xc[--k] == 0; xc.pop() );
-            if ( !xc[0] ) return '0';
-
-            if ( i < 0 ) {
-                --e;
-            } else {
-                x.c = xc;
-                x.e = e;
-
-                // sign is needed for correct rounding.
-                x.s = sign;
-                x = div( x, y, dp, rm, baseOut );
-                xc = x.c;
-                r = x.r;
-                e = x.e;
-            }
-
-            d = e + dp + 1;
-
-            // The rounding digit, i.e. the digit to the right of the digit that may be rounded up.
-            i = xc[d];
-            k = baseOut / 2;
-            r = r || d < 0 || xc[d + 1] != null;
-
-            r = rm < 4 ? ( i != null || r ) && ( rm == 0 || rm == ( x.s < 0 ? 3 : 2 ) )
-                       : i > k || i == k &&( rm == 4 || r || rm == 6 && xc[d - 1] & 1 ||
-                         rm == ( x.s < 0 ? 8 : 7 ) );
-
-            if ( d < 1 || !xc[0] ) {
-
-                // 1^-dp or 0.
-                str = r ? toFixedPoint( '1', -dp ) : '0';
-            } else {
-                xc.length = d;
-
-                if (r) {
-
-                    // Rounding up may mean the previous digit has to be rounded up and so on.
-                    for ( --baseOut; ++xc[--d] > baseOut; ) {
-                        xc[d] = 0;
-
-                        if ( !d ) {
-                            ++e;
-                            xc.unshift(1);
-                        }
-                    }
-                }
-
-                // Determine trailing zeros.
-                for ( k = xc.length; !xc[--k]; );
-
-                // E.g. [4, 11, 15] becomes 4bf.
-                for ( i = 0, str = ''; i <= k; str += ALPHABET.charAt( xc[i++] ) );
-                str = toFixedPoint( str, e );
-            }
-
-            // The caller will add the sign.
-            return str;
-        }
-
-
-        // Perform division in the specified base. Called by div and convertBase.
-        div = (function () {
-
-            // Assume non-zero x and k.
-            function multiply( x, k, base ) {
-                var m, temp, xlo, xhi,
-                    carry = 0,
-                    i = x.length,
-                    klo = k % SQRT_BASE,
-                    khi = k / SQRT_BASE | 0;
-
-                for ( x = x.slice(); i--; ) {
-                    xlo = x[i] % SQRT_BASE;
-                    xhi = x[i] / SQRT_BASE | 0;
-                    m = khi * xlo + xhi * klo;
-                    temp = klo * xlo + ( ( m % SQRT_BASE ) * SQRT_BASE ) + carry;
-                    carry = ( temp / base | 0 ) + ( m / SQRT_BASE | 0 ) + khi * xhi;
-                    x[i] = temp % base;
-                }
-
-                if (carry) x.unshift(carry);
-
-                return x;
-            }
-
-            function compare( a, b, aL, bL ) {
-                var i, cmp;
-
-                if ( aL != bL ) {
-                    cmp = aL > bL ? 1 : -1;
-                } else {
-
-                    for ( i = cmp = 0; i < aL; i++ ) {
-
-                        if ( a[i] != b[i] ) {
-                            cmp = a[i] > b[i] ? 1 : -1;
-                            break;
-                        }
-                    }
-                }
-                return cmp;
-            }
-
-            function subtract( a, b, aL, base ) {
-                var i = 0;
-
-                // Subtract b from a.
-                for ( ; aL--; ) {
-                    a[aL] -= i;
-                    i = a[aL] < b[aL] ? 1 : 0;
-                    a[aL] = i * base + a[aL] - b[aL];
-                }
-
-                // Remove leading zeros.
-                for ( ; !a[0] && a.length > 1; a.shift() );
-            }
-
-            // x: dividend, y: divisor.
-            return function ( x, y, dp, rm, base ) {
-                var cmp, e, i, more, n, prod, prodL, q, qc, rem, remL, rem0, xi, xL, yc0,
-                    yL, yz,
-                    s = x.s == y.s ? 1 : -1,
-                    xc = x.c,
-                    yc = y.c;
-
-                // Either NaN, Infinity or 0?
-                if ( !xc || !xc[0] || !yc || !yc[0] ) {
-
-                    return new BigNumber(
-
-                      // Return NaN if either NaN, or both Infinity or 0.
-                      !x.s || !y.s || ( xc ? yc && xc[0] == yc[0] : !yc ) ? NaN :
-
-                        // Return ±0 if x is ±0 or y is ±Infinity, or return ±Infinity as y is ±0.
-                        xc && xc[0] == 0 || !yc ? s * 0 : s / 0
-                    );
-                }
-
-                q = new BigNumber(s);
-                qc = q.c = [];
-                e = x.e - y.e;
-                s = dp + e + 1;
-
-                if ( !base ) {
-                    base = BASE;
-                    e = bitFloor( x.e / LOG_BASE ) - bitFloor( y.e / LOG_BASE );
-                    s = s / LOG_BASE | 0;
-                }
-
-                // Result exponent may be one less then the current value of e.
-                // The coefficients of the BigNumbers from convertBase may have trailing zeros.
-                for ( i = 0; yc[i] == ( xc[i] || 0 ); i++ );
-                if ( yc[i] > ( xc[i] || 0 ) ) e--;
-
-                if ( s < 0 ) {
-                    qc.push(1);
-                    more = true;
-                } else {
-                    xL = xc.length;
-                    yL = yc.length;
-                    i = 0;
-                    s += 2;
-
-                    // Normalise xc and yc so highest order digit of yc is >= base / 2.
-
-                    n = mathfloor( base / ( yc[0] + 1 ) );
-
-                    // Not necessary, but to handle odd bases where yc[0] == ( base / 2 ) - 1.
-                    // if ( n > 1 || n++ == 1 && yc[0] < base / 2 ) {
-                    if ( n > 1 ) {
-                        yc = multiply( yc, n, base );
-                        xc = multiply( xc, n, base );
-                        yL = yc.length;
-                        xL = xc.length;
-                    }
-
-                    xi = yL;
-                    rem = xc.slice( 0, yL );
-                    remL = rem.length;
-
-                    // Add zeros to make remainder as long as divisor.
-                    for ( ; remL < yL; rem[remL++] = 0 );
-                    yz = yc.slice();
-                    yz.unshift(0);
-                    yc0 = yc[0];
-                    if ( yc[1] >= base / 2 ) yc0++;
-                    // Not necessary, but to prevent trial digit n > base, when using base 3.
-                    // else if ( base == 3 && yc0 == 1 ) yc0 = 1 + 1e-15;
-
-                    do {
-                        n = 0;
-
-                        // Compare divisor and remainder.
-                        cmp = compare( yc, rem, yL, remL );
-
-                        // If divisor < remainder.
-                        if ( cmp < 0 ) {
-
-                            // Calculate trial digit, n.
-
-                            rem0 = rem[0];
-                            if ( yL != remL ) rem0 = rem0 * base + ( rem[1] || 0 );
-
-                            // n is how many times the divisor goes into the current remainder.
-                            n = mathfloor( rem0 / yc0 );
-
-                            //  Algorithm:
-                            //  1. product = divisor * trial digit (n)
-                            //  2. if product > remainder: product -= divisor, n--
-                            //  3. remainder -= product
-                            //  4. if product was < remainder at 2:
-                            //    5. compare new remainder and divisor
-                            //    6. If remainder > divisor: remainder -= divisor, n++
-
-                            if ( n > 1 ) {
-
-                                // n may be > base only when base is 3.
-                                if (n >= base) n = base - 1;
-
-                                // product = divisor * trial digit.
-                                prod = multiply( yc, n, base );
-                                prodL = prod.length;
-                                remL = rem.length;
-
-                                // Compare product and remainder.
-                                // If product > remainder.
-                                // Trial digit n too high.
-                                // n is 1 too high about 5% of the time, and is not known to have
-                                // ever been more than 1 too high.
-                                while ( compare( prod, rem, prodL, remL ) == 1 ) {
-                                    n--;
-
-                                    // Subtract divisor from product.
-                                    subtract( prod, yL < prodL ? yz : yc, prodL, base );
-                                    prodL = prod.length;
-                                    cmp = 1;
-                                }
-                            } else {
-
-                                // n is 0 or 1, cmp is -1.
-                                // If n is 0, there is no need to compare yc and rem again below,
-                                // so change cmp to 1 to avoid it.
-                                // If n is 1, leave cmp as -1, so yc and rem are compared again.
-                                if ( n == 0 ) {
-
-                                    // divisor < remainder, so n must be at least 1.
-                                    cmp = n = 1;
-                                }
-
-                                // product = divisor
-                                prod = yc.slice();
-                                prodL = prod.length;
-                            }
-
-                            if ( prodL < remL ) prod.unshift(0);
-
-                            // Subtract product from remainder.
-                            subtract( rem, prod, remL, base );
-                            remL = rem.length;
-
-                             // If product was < remainder.
-                            if ( cmp == -1 ) {
-
-                                // Compare divisor and new remainder.
-                                // If divisor < new remainder, subtract divisor from remainder.
-                                // Trial digit n too low.
-                                // n is 1 too low about 5% of the time, and very rarely 2 too low.
-                                while ( compare( yc, rem, yL, remL ) < 1 ) {
-                                    n++;
-
-                                    // Subtract divisor from remainder.
-                                    subtract( rem, yL < remL ? yz : yc, remL, base );
-                                    remL = rem.length;
-                                }
-                            }
-                        } else if ( cmp === 0 ) {
-                            n++;
-                            rem = [0];
-                        } // else cmp === 1 and n will be 0
-
-                        // Add the next digit, n, to the result array.
-                        qc[i++] = n;
-
-                        // Update the remainder.
-                        if ( rem[0] ) {
-                            rem[remL++] = xc[xi] || 0;
-                        } else {
-                            rem = [ xc[xi] ];
-                            remL = 1;
-                        }
-                    } while ( ( xi++ < xL || rem[0] != null ) && s-- );
-
-                    more = rem[0] != null;
-
-                    // Leading zero?
-                    if ( !qc[0] ) qc.shift();
-                }
-
-                if ( base == BASE ) {
-
-                    // To calculate q.e, first get the number of digits of qc[0].
-                    for ( i = 1, s = qc[0]; s >= 10; s /= 10, i++ );
-                    round( q, dp + ( q.e = i + e * LOG_BASE - 1 ) + 1, rm, more );
-
-                // Caller is convertBase.
-                } else {
-                    q.e = e;
-                    q.r = +more;
-                }
-
-                return q;
-            };
-        })();
-
-
-        /*
-         * Return a string representing the value of BigNumber n in fixed-point or exponential
-         * notation rounded to the specified decimal places or significant digits.
-         *
-         * n is a BigNumber.
-         * i is the index of the last digit required (i.e. the digit that may be rounded up).
-         * rm is the rounding mode.
-         * caller is caller id: toExponential 19, toFixed 20, toFormat 21, toPrecision 24.
-         */
-        function format( n, i, rm, caller ) {
-            var c0, e, ne, len, str;
-
-            rm = rm != null && isValidInt( rm, 0, 8, caller, roundingMode )
-              ? rm | 0 : ROUNDING_MODE;
-
-            if ( !n.c ) return n.toString();
-            c0 = n.c[0];
-            ne = n.e;
-
-            if ( i == null ) {
-                str = coeffToString( n.c );
-                str = caller == 19 || caller == 24 && ne <= TO_EXP_NEG
-                  ? toExponential( str, ne )
-                  : toFixedPoint( str, ne );
-            } else {
-                n = round( new BigNumber(n), i, rm );
-
-                // n.e may have changed if the value was rounded up.
-                e = n.e;
-
-                str = coeffToString( n.c );
-                len = str.length;
-
-                // toPrecision returns exponential notation if the number of significant digits
-                // specified is less than the number of digits necessary to represent the integer
-                // part of the value in fixed-point notation.
-
-                // Exponential notation.
-                if ( caller == 19 || caller == 24 && ( i <= e || e <= TO_EXP_NEG ) ) {
-
-                    // Append zeros?
-                    for ( ; len < i; str += '0', len++ );
-                    str = toExponential( str, e );
-
-                // Fixed-point notation.
-                } else {
-                    i -= ne;
-                    str = toFixedPoint( str, e );
-
-                    // Append zeros?
-                    if ( e + 1 > len ) {
-                        if ( --i > 0 ) for ( str += '.'; i--; str += '0' );
-                    } else {
-                        i += e - len;
-                        if ( i > 0 ) {
-                            if ( e + 1 == len ) str += '.';
-                            for ( ; i--; str += '0' );
-                        }
-                    }
-                }
-            }
-
-            return n.s < 0 && c0 ? '-' + str : str;
-        }
-
-
-        // Handle BigNumber.max and BigNumber.min.
-        function maxOrMin( args, method ) {
-            var m, n,
-                i = 0;
-
-            if ( isArray( args[0] ) ) args = args[0];
-            m = new BigNumber( args[0] );
-
-            for ( ; ++i < args.length; ) {
-                n = new BigNumber( args[i] );
-
-                // If any number is NaN, return NaN.
-                if ( !n.s ) {
-                    m = n;
-                    break;
-                } else if ( method.call( m, n ) ) {
-                    m = n;
-                }
-            }
-
-            return m;
-        }
-
-
-        /*
-         * Return true if n is an integer in range, otherwise throw.
-         * Use for argument validation when ERRORS is true.
-         */
-        function intValidatorWithErrors( n, min, max, caller, name ) {
-            if ( n < min || n > max || n != truncate(n) ) {
-                raise( caller, ( name || 'decimal places' ) +
-                  ( n < min || n > max ? ' out of range' : ' not an integer' ), n );
-            }
-
-            return true;
-        }
-
-
-        /*
-         * Strip trailing zeros, calculate base 10 exponent and check against MIN_EXP and MAX_EXP.
-         * Called by minus, plus and times.
-         */
-        function normalise( n, c, e ) {
-            var i = 1,
-                j = c.length;
-
-             // Remove trailing zeros.
-            for ( ; !c[--j]; c.pop() );
-
-            // Calculate the base 10 exponent. First get the number of digits of c[0].
-            for ( j = c[0]; j >= 10; j /= 10, i++ );
-
-            // Overflow?
-            if ( ( e = i + e * LOG_BASE - 1 ) > MAX_EXP ) {
-
-                // Infinity.
-                n.c = n.e = null;
-
-            // Underflow?
-            } else if ( e < MIN_EXP ) {
-
-                // Zero.
-                n.c = [ n.e = 0 ];
-            } else {
-                n.e = e;
-                n.c = c;
-            }
-
-            return n;
-        }
-
-
-        // Handle values that fail the validity test in BigNumber.
-        parseNumeric = (function () {
-            var basePrefix = /^(-?)0([xbo])/i,
-                dotAfter = /^([^.]+)\.$/,
-                dotBefore = /^\.([^.]+)$/,
-                isInfinityOrNaN = /^-?(Infinity|NaN)$/,
-                whitespaceOrPlus = /^\s*\+|^\s+|\s+$/g;
-
-            return function ( x, str, num, b ) {
-                var base,
-                    s = num ? str : str.replace( whitespaceOrPlus, '' );
-
-                // No exception on ±Infinity or NaN.
-                if ( isInfinityOrNaN.test(s) ) {
-                    x.s = isNaN(s) ? null : s < 0 ? -1 : 1;
-                } else {
-                    if ( !num ) {
-
-                        // basePrefix = /^(-?)0([xbo])(?=\w[\w.]*$)/i
-                        s = s.replace( basePrefix, function ( m, p1, p2 ) {
-                            base = ( p2 = p2.toLowerCase() ) == 'x' ? 16 : p2 == 'b' ? 2 : 8;
-                            return !b || b == base ? p1 : m;
-                        });
-
-                        if (b) {
-                            base = b;
-
-                            // E.g. '1.' to '1', '.1' to '0.1'
-                            s = s.replace( dotAfter, '$1' ).replace( dotBefore, '0.$1' );
-                        }
-
-                        if ( str != s ) return new BigNumber( s, base );
-                    }
-
-                    // 'new BigNumber() not a number: {n}'
-                    // 'new BigNumber() not a base {b} number: {n}'
-                    if (ERRORS) raise( id, 'not a' + ( b ? ' base ' + b : '' ) + ' number', str );
-                    x.s = null;
-                }
-
-                x.c = x.e = null;
-                id = 0;
-            }
-        })();
-
-
-        // Throw a BigNumber Error.
-        function raise( caller, msg, val ) {
-            var error = new Error( [
-                'new BigNumber',     // 0
-                'cmp',               // 1
-                'config',            // 2
-                'div',               // 3
-                'divToInt',          // 4
-                'eq',                // 5
-                'gt',                // 6
-                'gte',               // 7
-                'lt',                // 8
-                'lte',               // 9
-                'minus',             // 10
-                'mod',               // 11
-                'plus',              // 12
-                'precision',         // 13
-                'random',            // 14
-                'round',             // 15
-                'shift',             // 16
-                'times',             // 17
-                'toDigits',          // 18
-                'toExponential',     // 19
-                'toFixed',           // 20
-                'toFormat',          // 21
-                'toFraction',        // 22
-                'pow',               // 23
-                'toPrecision',       // 24
-                'toString',          // 25
-                'BigNumber'          // 26
-            ][caller] + '() ' + msg + ': ' + val );
-
-            error.name = 'BigNumber Error';
-            id = 0;
-            throw error;
-        }
-
-
-        /*
-         * Round x to sd significant digits using rounding mode rm. Check for over/under-flow.
-         * If r is truthy, it is known that there are more digits after the rounding digit.
-         */
-        function round( x, sd, rm, r ) {
-            var d, i, j, k, n, ni, rd,
-                xc = x.c,
-                pows10 = POWS_TEN;
-
-            // if x is not Infinity or NaN...
-            if (xc) {
-
-                // rd is the rounding digit, i.e. the digit after the digit that may be rounded up.
-                // n is a base 1e14 number, the value of the element of array x.c containing rd.
-                // ni is the index of n within x.c.
-                // d is the number of digits of n.
-                // i is the index of rd within n including leading zeros.
-                // j is the actual index of rd within n (if < 0, rd is a leading zero).
-                out: {
-
-                    // Get the number of digits of the first element of xc.
-                    for ( d = 1, k = xc[0]; k >= 10; k /= 10, d++ );
-                    i = sd - d;
-
-                    // If the rounding digit is in the first element of xc...
-                    if ( i < 0 ) {
-                        i += LOG_BASE;
-                        j = sd;
-                        n = xc[ ni = 0 ];
-
-                        // Get the rounding digit at index j of n.
-                        rd = n / pows10[ d - j - 1 ] % 10 | 0;
-                    } else {
-                        ni = mathceil( ( i + 1 ) / LOG_BASE );
-
-                        if ( ni >= xc.length ) {
-
-                            if (r) {
-
-                                // Needed by sqrt.
-                                for ( ; xc.length <= ni; xc.push(0) );
-                                n = rd = 0;
-                                d = 1;
-                                i %= LOG_BASE;
-                                j = i - LOG_BASE + 1;
-                            } else {
-                                break out;
-                            }
-                        } else {
-                            n = k = xc[ni];
-
-                            // Get the number of digits of n.
-                            for ( d = 1; k >= 10; k /= 10, d++ );
-
-                            // Get the index of rd within n.
-                            i %= LOG_BASE;
-
-                            // Get the index of rd within n, adjusted for leading zeros.
-                            // The number of leading zeros of n is given by LOG_BASE - d.
-                            j = i - LOG_BASE + d;
-
-                            // Get the rounding digit at index j of n.
-                            rd = j < 0 ? 0 : n / pows10[ d - j - 1 ] % 10 | 0;
-                        }
-                    }
-
-                    r = r || sd < 0 ||
-
-                    // Are there any non-zero digits after the rounding digit?
-                    // The expression  n % pows10[ d - j - 1 ]  returns all digits of n to the right
-                    // of the digit at j, e.g. if n is 908714 and j is 2, the expression gives 714.
-                      xc[ni + 1] != null || ( j < 0 ? n : n % pows10[ d - j - 1 ] );
-
-                    r = rm < 4
-                      ? ( rd || r ) && ( rm == 0 || rm == ( x.s < 0 ? 3 : 2 ) )
-                      : rd > 5 || rd == 5 && ( rm == 4 || r || rm == 6 &&
-
-                        // Check whether the digit to the left of the rounding digit is odd.
-                        ( ( i > 0 ? j > 0 ? n / pows10[ d - j ] : 0 : xc[ni - 1] ) % 10 ) & 1 ||
-                          rm == ( x.s < 0 ? 8 : 7 ) );
-
-                    if ( sd < 1 || !xc[0] ) {
-                        xc.length = 0;
-
-                        if (r) {
-
-                            // Convert sd to decimal places.
-                            sd -= x.e + 1;
-
-                            // 1, 0.1, 0.01, 0.001, 0.0001 etc.
-                            xc[0] = pows10[ sd % LOG_BASE ];
-                            x.e = -sd || 0;
-                        } else {
-
-                            // Zero.
-                            xc[0] = x.e = 0;
-                        }
-
-                        return x;
-                    }
-
-                    // Remove excess digits.
-                    if ( i == 0 ) {
-                        xc.length = ni;
-                        k = 1;
-                        ni--;
-                    } else {
-                        xc.length = ni + 1;
-                        k = pows10[ LOG_BASE - i ];
-
-                        // E.g. 56700 becomes 56000 if 7 is the rounding digit.
-                        // j > 0 means i > number of leading zeros of n.
-                        xc[ni] = j > 0 ? mathfloor( n / pows10[ d - j ] % pows10[j] ) * k : 0;
-                    }
-
-                    // Round up?
-                    if (r) {
-
-                        for ( ; ; ) {
-
-                            // If the digit to be rounded up is in the first element of xc...
-                            if ( ni == 0 ) {
-
-                                // i will be the length of xc[0] before k is added.
-                                for ( i = 1, j = xc[0]; j >= 10; j /= 10, i++ );
-                                j = xc[0] += k;
-                                for ( k = 1; j >= 10; j /= 10, k++ );
-
-                                // if i != k the length has increased.
-                                if ( i != k ) {
-                                    x.e++;
-                                    if ( xc[0] == BASE ) xc[0] = 1;
-                                }
-
-                                break;
-                            } else {
-                                xc[ni] += k;
-                                if ( xc[ni] != BASE ) break;
-                                xc[ni--] = 0;
-                                k = 1;
-                            }
-                        }
-                    }
-
-                    // Remove trailing zeros.
-                    for ( i = xc.length; xc[--i] === 0; xc.pop() );
-                }
-
-                // Overflow? Infinity.
-                if ( x.e > MAX_EXP ) {
-                    x.c = x.e = null;
-
-                // Underflow? Zero.
-                } else if ( x.e < MIN_EXP ) {
-                    x.c = [ x.e = 0 ];
-                }
-            }
-
-            return x;
-        }
-
-
-        // PROTOTYPE/INSTANCE METHODS
-
-
-        /*
-         * Return a new BigNumber whose value is the absolute value of this BigNumber.
-         */
-        P.absoluteValue = P.abs = function () {
-            var x = new BigNumber(this);
-            if ( x.s < 0 ) x.s = 1;
-            return x;
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber rounded to a whole
-         * number in the direction of Infinity.
-         */
-        P.ceil = function () {
-            return round( new BigNumber(this), this.e + 1, 2 );
-        };
-
-
-        /*
-         * Return
-         * 1 if the value of this BigNumber is greater than the value of BigNumber(y, b),
-         * -1 if the value of this BigNumber is less than the value of BigNumber(y, b),
-         * 0 if they have the same value,
-         * or null if the value of either is NaN.
-         */
-        P.comparedTo = P.cmp = function ( y, b ) {
-            id = 1;
-            return compare( this, new BigNumber( y, b ) );
-        };
-
-
-        /*
-         * Return the number of decimal places of the value of this BigNumber, or null if the value
-         * of this BigNumber is ±Infinity or NaN.
-         */
-        P.decimalPlaces = P.dp = function () {
-            var n, v,
-                c = this.c;
-
-            if ( !c ) return null;
-            n = ( ( v = c.length - 1 ) - bitFloor( this.e / LOG_BASE ) ) * LOG_BASE;
-
-            // Subtract the number of trailing zeros of the last number.
-            if ( v = c[v] ) for ( ; v % 10 == 0; v /= 10, n-- );
-            if ( n < 0 ) n = 0;
-
-            return n;
-        };
-
-
-        /*
-         *  n / 0 = I
-         *  n / N = N
-         *  n / I = 0
-         *  0 / n = 0
-         *  0 / 0 = N
-         *  0 / N = N
-         *  0 / I = 0
-         *  N / n = N
-         *  N / 0 = N
-         *  N / N = N
-         *  N / I = N
-         *  I / n = I
-         *  I / 0 = I
-         *  I / N = N
-         *  I / I = N
-         *
-         * Return a new BigNumber whose value is the value of this BigNumber divided by the value of
-         * BigNumber(y, b), rounded according to DECIMAL_PLACES and ROUNDING_MODE.
-         */
-        P.dividedBy = P.div = function ( y, b ) {
-            id = 3;
-            return div( this, new BigNumber( y, b ), DECIMAL_PLACES, ROUNDING_MODE );
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the integer part of dividing the value of this
-         * BigNumber by the value of BigNumber(y, b).
-         */
-        P.dividedToIntegerBy = P.divToInt = function ( y, b ) {
-            id = 4;
-            return div( this, new BigNumber( y, b ), 0, 1 );
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is equal to the value of BigNumber(y, b),
-         * otherwise returns false.
-         */
-        P.equals = P.eq = function ( y, b ) {
-            id = 5;
-            return compare( this, new BigNumber( y, b ) ) === 0;
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber rounded to a whole
-         * number in the direction of -Infinity.
-         */
-        P.floor = function () {
-            return round( new BigNumber(this), this.e + 1, 3 );
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is greater than the value of BigNumber(y, b),
-         * otherwise returns false.
-         */
-        P.greaterThan = P.gt = function ( y, b ) {
-            id = 6;
-            return compare( this, new BigNumber( y, b ) ) > 0;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is greater than or equal to the value of
-         * BigNumber(y, b), otherwise returns false.
-         */
-        P.greaterThanOrEqualTo = P.gte = function ( y, b ) {
-            id = 7;
-            return ( b = compare( this, new BigNumber( y, b ) ) ) === 1 || b === 0;
-
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is a finite number, otherwise returns false.
-         */
-        P.isFinite = function () {
-            return !!this.c;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is an integer, otherwise return false.
-         */
-        P.isInteger = P.isInt = function () {
-            return !!this.c && bitFloor( this.e / LOG_BASE ) > this.c.length - 2;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is NaN, otherwise returns false.
-         */
-        P.isNaN = function () {
-            return !this.s;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is negative, otherwise returns false.
-         */
-        P.isNegative = P.isNeg = function () {
-            return this.s < 0;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is 0 or -0, otherwise returns false.
-         */
-        P.isZero = function () {
-            return !!this.c && this.c[0] == 0;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is less than the value of BigNumber(y, b),
-         * otherwise returns false.
-         */
-        P.lessThan = P.lt = function ( y, b ) {
-            id = 8;
-            return compare( this, new BigNumber( y, b ) ) < 0;
-        };
-
-
-        /*
-         * Return true if the value of this BigNumber is less than or equal to the value of
-         * BigNumber(y, b), otherwise returns false.
-         */
-        P.lessThanOrEqualTo = P.lte = function ( y, b ) {
-            id = 9;
-            return ( b = compare( this, new BigNumber( y, b ) ) ) === -1 || b === 0;
-        };
-
-
-        /*
-         *  n - 0 = n
-         *  n - N = N
-         *  n - I = -I
-         *  0 - n = -n
-         *  0 - 0 = 0
-         *  0 - N = N
-         *  0 - I = -I
-         *  N - n = N
-         *  N - 0 = N
-         *  N - N = N
-         *  N - I = N
-         *  I - n = I
-         *  I - 0 = I
-         *  I - N = N
-         *  I - I = N
-         *
-         * Return a new BigNumber whose value is the value of this BigNumber minus the value of
-         * BigNumber(y, b).
-         */
-        P.minus = P.sub = function ( y, b ) {
-            var i, j, t, xLTy,
-                x = this,
-                a = x.s;
-
-            id = 10;
-            y = new BigNumber( y, b );
-            b = y.s;
-
-            // Either NaN?
-            if ( !a || !b ) return new BigNumber(NaN);
-
-            // Signs differ?
-            if ( a != b ) {
-                y.s = -b;
-                return x.plus(y);
-            }
-
-            var xe = x.e / LOG_BASE,
-                ye = y.e / LOG_BASE,
-                xc = x.c,
-                yc = y.c;
-
-            if ( !xe || !ye ) {
-
-                // Either Infinity?
-                if ( !xc || !yc ) return xc ? ( y.s = -b, y ) : new BigNumber( yc ? x : NaN );
-
-                // Either zero?
-                if ( !xc[0] || !yc[0] ) {
-
-                    // Return y if y is non-zero, x if x is non-zero, or zero if both are zero.
-                    return yc[0] ? ( y.s = -b, y ) : new BigNumber( xc[0] ? x :
-
-                      // IEEE 754 (2008) 6.3: n - n = -0 when rounding to -Infinity
-                      ROUNDING_MODE == 3 ? -0 : 0 );
-                }
-            }
-
-            xe = bitFloor(xe);
-            ye = bitFloor(ye);
-            xc = xc.slice();
-
-            // Determine which is the bigger number.
-            if ( a = xe - ye ) {
-
-                if ( xLTy = a < 0 ) {
-                    a = -a;
-                    t = xc;
-                } else {
-                    ye = xe;
-                    t = yc;
-                }
-
-                t.reverse();
-
-                // Prepend zeros to equalise exponents.
-                for ( b = a; b--; t.push(0) );
-                t.reverse();
-            } else {
-
-                // Exponents equal. Check digit by digit.
-                j = ( xLTy = ( a = xc.length ) < ( b = yc.length ) ) ? a : b;
-
-                for ( a = b = 0; b < j; b++ ) {
-
-                    if ( xc[b] != yc[b] ) {
-                        xLTy = xc[b] < yc[b];
-                        break;
-                    }
-                }
-            }
-
-            // x < y? Point xc to the array of the bigger number.
-            if (xLTy) t = xc, xc = yc, yc = t, y.s = -y.s;
-
-            b = ( j = yc.length ) - ( i = xc.length );
-
-            // Append zeros to xc if shorter.
-            // No need to add zeros to yc if shorter as subtract only needs to start at yc.length.
-            if ( b > 0 ) for ( ; b--; xc[i++] = 0 );
-            b = BASE - 1;
-
-            // Subtract yc from xc.
-            for ( ; j > a; ) {
-
-                if ( xc[--j] < yc[j] ) {
-                    for ( i = j; i && !xc[--i]; xc[i] = b );
-                    --xc[i];
-                    xc[j] += BASE;
-                }
-
-                xc[j] -= yc[j];
-            }
-
-            // Remove leading zeros and adjust exponent accordingly.
-            for ( ; xc[0] == 0; xc.shift(), --ye );
-
-            // Zero?
-            if ( !xc[0] ) {
-
-                // Following IEEE 754 (2008) 6.3,
-                // n - n = +0  but  n - n = -0  when rounding towards -Infinity.
-                y.s = ROUNDING_MODE == 3 ? -1 : 1;
-                y.c = [ y.e = 0 ];
-                return y;
-            }
-
-            // No need to check for Infinity as +x - +y != Infinity && -x - -y != Infinity
-            // for finite x and y.
-            return normalise( y, xc, ye );
-        };
-
-
-        /*
-         *   n % 0 =  N
-         *   n % N =  N
-         *   n % I =  n
-         *   0 % n =  0
-         *  -0 % n = -0
-         *   0 % 0 =  N
-         *   0 % N =  N
-         *   0 % I =  0
-         *   N % n =  N
-         *   N % 0 =  N
-         *   N % N =  N
-         *   N % I =  N
-         *   I % n =  N
-         *   I % 0 =  N
-         *   I % N =  N
-         *   I % I =  N
-         *
-         * Return a new BigNumber whose value is the value of this BigNumber modulo the value of
-         * BigNumber(y, b). The result depends on the value of MODULO_MODE.
-         */
-        P.modulo = P.mod = function ( y, b ) {
-            var q, s,
-                x = this;
-
-            id = 11;
-            y = new BigNumber( y, b );
-
-            // Return NaN if x is Infinity or NaN, or y is NaN or zero.
-            if ( !x.c || !y.s || y.c && !y.c[0] ) {
-                return new BigNumber(NaN);
-
-            // Return x if y is Infinity or x is zero.
-            } else if ( !y.c || x.c && !x.c[0] ) {
-                return new BigNumber(x);
-            }
-
-            if ( MODULO_MODE == 9 ) {
-
-                // Euclidian division: q = sign(y) * floor(x / abs(y))
-                // r = x - qy    where  0 <= r < abs(y)
-                s = y.s;
-                y.s = 1;
-                q = div( x, y, 0, 3 );
-                y.s = s;
-                q.s *= s;
-            } else {
-                q = div( x, y, 0, MODULO_MODE );
-            }
-
-            return x.minus( q.times(y) );
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber negated,
-         * i.e. multiplied by -1.
-         */
-        P.negated = P.neg = function () {
-            var x = new BigNumber(this);
-            x.s = -x.s || null;
-            return x;
-        };
-
-
-        /*
-         *  n + 0 = n
-         *  n + N = N
-         *  n + I = I
-         *  0 + n = n
-         *  0 + 0 = 0
-         *  0 + N = N
-         *  0 + I = I
-         *  N + n = N
-         *  N + 0 = N
-         *  N + N = N
-         *  N + I = N
-         *  I + n = I
-         *  I + 0 = I
-         *  I + N = N
-         *  I + I = I
-         *
-         * Return a new BigNumber whose value is the value of this BigNumber plus the value of
-         * BigNumber(y, b).
-         */
-        P.plus = P.add = function ( y, b ) {
-            var t,
-                x = this,
-                a = x.s;
-
-            id = 12;
-            y = new BigNumber( y, b );
-            b = y.s;
-
-            // Either NaN?
-            if ( !a || !b ) return new BigNumber(NaN);
-
-            // Signs differ?
-             if ( a != b ) {
-                y.s = -b;
-                return x.minus(y);
-            }
-
-            var xe = x.e / LOG_BASE,
-                ye = y.e / LOG_BASE,
-                xc = x.c,
-                yc = y.c;
-
-            if ( !xe || !ye ) {
-
-                // Return ±Infinity if either ±Infinity.
-                if ( !xc || !yc ) return new BigNumber( a / 0 );
-
-                // Either zero?
-                // Return y if y is non-zero, x if x is non-zero, or zero if both are zero.
-                if ( !xc[0] || !yc[0] ) return yc[0] ? y : new BigNumber( xc[0] ? x : a * 0 );
-            }
-
-            xe = bitFloor(xe);
-            ye = bitFloor(ye);
-            xc = xc.slice();
-
-            // Prepend zeros to equalise exponents. Faster to use reverse then do unshifts.
-            if ( a = xe - ye ) {
-                if ( a > 0 ) {
-                    ye = xe;
-                    t = yc;
-                } else {
-                    a = -a;
-                    t = xc;
-                }
-
-                t.reverse();
-                for ( ; a--; t.push(0) );
-                t.reverse();
-            }
-
-            a = xc.length;
-            b = yc.length;
-
-            // Point xc to the longer array, and b to the shorter length.
-            if ( a - b < 0 ) t = yc, yc = xc, xc = t, b = a;
-
-            // Only start adding at yc.length - 1 as the further digits of xc can be ignored.
-            for ( a = 0; b; ) {
-                a = ( xc[--b] = xc[b] + yc[b] + a ) / BASE | 0;
-                xc[b] %= BASE;
-            }
-
-            if (a) {
-                xc.unshift(a);
-                ++ye;
-            }
-
-            // No need to check for zero, as +x + +y != 0 && -x + -y != 0
-            // ye = MAX_EXP + 1 possible
-            return normalise( y, xc, ye );
-        };
-
-
-        /*
-         * Return the number of significant digits of the value of this BigNumber.
-         *
-         * [z] {boolean|number} Whether to count integer-part trailing zeros: true, false, 1 or 0.
-         */
-        P.precision = P.sd = function (z) {
-            var n, v,
-                x = this,
-                c = x.c;
-
-            // 'precision() argument not a boolean or binary digit: {z}'
-            if ( z != null && z !== !!z && z !== 1 && z !== 0 ) {
-                if (ERRORS) raise( 13, 'argument' + notBool, z );
-                if ( z != !!z ) z = null;
-            }
-
-            if ( !c ) return null;
-            v = c.length - 1;
-            n = v * LOG_BASE + 1;
-
-            if ( v = c[v] ) {
-
-                // Subtract the number of trailing zeros of the last element.
-                for ( ; v % 10 == 0; v /= 10, n-- );
-
-                // Add the number of digits of the first element.
-                for ( v = c[0]; v >= 10; v /= 10, n++ );
-            }
-
-            if ( z && x.e + 1 > n ) n = x.e + 1;
-
-            return n;
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber rounded to a maximum of
-         * dp decimal places using rounding mode rm, or to 0 and ROUNDING_MODE respectively if
-         * omitted.
-         *
-         * [dp] {number} Decimal places. Integer, 0 to MAX inclusive.
-         * [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
-         *
-         * 'round() decimal places out of range: {dp}'
-         * 'round() decimal places not an integer: {dp}'
-         * 'round() rounding mode not an integer: {rm}'
-         * 'round() rounding mode out of range: {rm}'
-         */
-        P.round = function ( dp, rm ) {
-            var n = new BigNumber(this);
-
-            if ( dp == null || isValidInt( dp, 0, MAX, 15 ) ) {
-                round( n, ~~dp + this.e + 1, rm == null ||
-                  !isValidInt( rm, 0, 8, 15, roundingMode ) ? ROUNDING_MODE : rm | 0 );
-            }
-
-            return n;
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber shifted by k places
-         * (powers of 10). Shift to the right if n > 0, and to the left if n < 0.
-         *
-         * k {number} Integer, -MAX_SAFE_INTEGER to MAX_SAFE_INTEGER inclusive.
-         *
-         * If k is out of range and ERRORS is false, the result will be ±0 if k < 0, or ±Infinity
-         * otherwise.
-         *
-         * 'shift() argument not an integer: {k}'
-         * 'shift() argument out of range: {k}'
-         */
-        P.shift = function (k) {
-            var n = this;
-            return isValidInt( k, -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER, 16, 'argument' )
-
-              // k < 1e+21, or truncate(k) will produce exponential notation.
-              ? n.times( '1e' + truncate(k) )
-              : new BigNumber( n.c && n.c[0] && ( k < -MAX_SAFE_INTEGER || k > MAX_SAFE_INTEGER )
-                ? n.s * ( k < 0 ? 0 : 1 / 0 )
-                : n );
-        };
-
-
-        /*
-         *  sqrt(-n) =  N
-         *  sqrt( N) =  N
-         *  sqrt(-I) =  N
-         *  sqrt( I) =  I
-         *  sqrt( 0) =  0
-         *  sqrt(-0) = -0
-         *
-         * Return a new BigNumber whose value is the square root of the value of this BigNumber,
-         * rounded according to DECIMAL_PLACES and ROUNDING_MODE.
-         */
-        P.squareRoot = P.sqrt = function () {
-            var m, n, r, rep, t,
-                x = this,
-                c = x.c,
-                s = x.s,
-                e = x.e,
-                dp = DECIMAL_PLACES + 4,
-                half = new BigNumber('0.5');
-
-            // Negative/NaN/Infinity/zero?
-            if ( s !== 1 || !c || !c[0] ) {
-                return new BigNumber( !s || s < 0 && ( !c || c[0] ) ? NaN : c ? x : 1 / 0 );
-            }
-
-            // Initial estimate.
-            s = Math.sqrt( +x );
-
-            // Math.sqrt underflow/overflow?
-            // Pass x to Math.sqrt as integer, then adjust the exponent of the result.
-            if ( s == 0 || s == 1 / 0 ) {
-                n = coeffToString(c);
-                if ( ( n.length + e ) % 2 == 0 ) n += '0';
-                s = Math.sqrt(n);
-                e = bitFloor( ( e + 1 ) / 2 ) - ( e < 0 || e % 2 );
-
-                if ( s == 1 / 0 ) {
-                    n = '1e' + e;
-                } else {
-                    n = s.toExponential();
-                    n = n.slice( 0, n.indexOf('e') + 1 ) + e;
-                }
-
-                r = new BigNumber(n);
-            } else {
-                r = new BigNumber( s + '' );
-            }
-
-            // Check for zero.
-            // r could be zero if MIN_EXP is changed after the this value was created.
-            // This would cause a division by zero (x/t) and hence Infinity below, which would cause
-            // coeffToString to throw.
-            if ( r.c[0] ) {
-                e = r.e;
-                s = e + dp;
-                if ( s < 3 ) s = 0;
-
-                // Newton-Raphson iteration.
-                for ( ; ; ) {
-                    t = r;
-                    r = half.times( t.plus( div( x, t, dp, 1 ) ) );
-
-                    if ( coeffToString( t.c   ).slice( 0, s ) === ( n =
-                         coeffToString( r.c ) ).slice( 0, s ) ) {
-
-                        // The exponent of r may here be one less than the final result exponent,
-                        // e.g 0.0009999 (e-4) --> 0.001 (e-3), so adjust s so the rounding digits
-                        // are indexed correctly.
-                        if ( r.e < e ) --s;
-                        n = n.slice( s - 3, s + 1 );
-
-                        // The 4th rounding digit may be in error by -1 so if the 4 rounding digits
-                        // are 9999 or 4999 (i.e. approaching a rounding boundary) continue the
-                        // iteration.
-                        if ( n == '9999' || !rep && n == '4999' ) {
-
-                            // On the first iteration only, check to see if rounding up gives the
-                            // exact result as the nines may infinitely repeat.
-                            if ( !rep ) {
-                                round( t, t.e + DECIMAL_PLACES + 2, 0 );
-
-                                if ( t.times(t).eq(x) ) {
-                                    r = t;
-                                    break;
-                                }
-                            }
-
-                            dp += 4;
-                            s += 4;
-                            rep = 1;
-                        } else {
-
-                            // If rounding digits are null, 0{0,4} or 50{0,3}, check for exact
-                            // result. If not, then there are further digits and m will be truthy.
-                            if ( !+n || !+n.slice(1) && n.charAt(0) == '5' ) {
-
-                                // Truncate to the first rounding digit.
-                                round( r, r.e + DECIMAL_PLACES + 2, 1 );
-                                m = !r.times(r).eq(x);
-                            }
-
-                            break;
-                        }
-                    }
-                }
-            }
-
-            return round( r, r.e + DECIMAL_PLACES + 1, ROUNDING_MODE, m );
-        };
-
-
-        /*
-         *  n * 0 = 0
-         *  n * N = N
-         *  n * I = I
-         *  0 * n = 0
-         *  0 * 0 = 0
-         *  0 * N = N
-         *  0 * I = N
-         *  N * n = N
-         *  N * 0 = N
-         *  N * N = N
-         *  N * I = N
-         *  I * n = I
-         *  I * 0 = N
-         *  I * N = N
-         *  I * I = I
-         *
-         * Return a new BigNumber whose value is the value of this BigNumber times the value of
-         * BigNumber(y, b).
-         */
-        P.times = P.mul = function ( y, b ) {
-            var c, e, i, j, k, m, xcL, xlo, xhi, ycL, ylo, yhi, zc,
-                base, sqrtBase,
-                x = this,
-                xc = x.c,
-                yc = ( id = 17, y = new BigNumber( y, b ) ).c;
-
-            // Either NaN, ±Infinity or ±0?
-            if ( !xc || !yc || !xc[0] || !yc[0] ) {
-
-                // Return NaN if either is NaN, or one is 0 and the other is Infinity.
-                if ( !x.s || !y.s || xc && !xc[0] && !yc || yc && !yc[0] && !xc ) {
-                    y.c = y.e = y.s = null;
-                } else {
-                    y.s *= x.s;
-
-                    // Return ±Infinity if either is ±Infinity.
-                    if ( !xc || !yc ) {
-                        y.c = y.e = null;
-
-                    // Return ±0 if either is ±0.
-                    } else {
-                        y.c = [0];
-                        y.e = 0;
-                    }
-                }
-
-                return y;
-            }
-
-            e = bitFloor( x.e / LOG_BASE ) + bitFloor( y.e / LOG_BASE );
-            y.s *= x.s;
-            xcL = xc.length;
-            ycL = yc.length;
-
-            // Ensure xc points to longer array and xcL to its length.
-            if ( xcL < ycL ) zc = xc, xc = yc, yc = zc, i = xcL, xcL = ycL, ycL = i;
-
-            // Initialise the result array with zeros.
-            for ( i = xcL + ycL, zc = []; i--; zc.push(0) );
-
-            base = BASE;
-            sqrtBase = SQRT_BASE;
-
-            for ( i = ycL; --i >= 0; ) {
-                c = 0;
-                ylo = yc[i] % sqrtBase;
-                yhi = yc[i] / sqrtBase | 0;
-
-                for ( k = xcL, j = i + k; j > i; ) {
-                    xlo = xc[--k] % sqrtBase;
-                    xhi = xc[k] / sqrtBase | 0;
-                    m = yhi * xlo + xhi * ylo;
-                    xlo = ylo * xlo + ( ( m % sqrtBase ) * sqrtBase ) + zc[j] + c;
-                    c = ( xlo / base | 0 ) + ( m / sqrtBase | 0 ) + yhi * xhi;
-                    zc[j--] = xlo % base;
-                }
-
-                zc[j] = c;
-            }
-
-            if (c) {
-                ++e;
-            } else {
-                zc.shift();
-            }
-
-            return normalise( y, zc, e );
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber rounded to a maximum of
-         * sd significant digits using rounding mode rm, or ROUNDING_MODE if rm is omitted.
-         *
-         * [sd] {number} Significant digits. Integer, 1 to MAX inclusive.
-         * [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
-         *
-         * 'toDigits() precision out of range: {sd}'
-         * 'toDigits() precision not an integer: {sd}'
-         * 'toDigits() rounding mode not an integer: {rm}'
-         * 'toDigits() rounding mode out of range: {rm}'
-         */
-        P.toDigits = function ( sd, rm ) {
-            var n = new BigNumber(this);
-            sd = sd == null || !isValidInt( sd, 1, MAX, 18, 'precision' ) ? null : sd | 0;
-            rm = rm == null || !isValidInt( rm, 0, 8, 18, roundingMode ) ? ROUNDING_MODE : rm | 0;
-            return sd ? round( n, sd, rm ) : n;
-        };
-
-
-        /*
-         * Return a string representing the value of this BigNumber in exponential notation and
-         * rounded using ROUNDING_MODE to dp fixed decimal places.
-         *
-         * [dp] {number} Decimal places. Integer, 0 to MAX inclusive.
-         * [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
-         *
-         * 'toExponential() decimal places not an integer: {dp}'
-         * 'toExponential() decimal places out of range: {dp}'
-         * 'toExponential() rounding mode not an integer: {rm}'
-         * 'toExponential() rounding mode out of range: {rm}'
-         */
-        P.toExponential = function ( dp, rm ) {
-            return format( this,
-              dp != null && isValidInt( dp, 0, MAX, 19 ) ? ~~dp + 1 : null, rm, 19 );
-        };
-
-
-        /*
-         * Return a string representing the value of this BigNumber in fixed-point notation rounding
-         * to dp fixed decimal places using rounding mode rm, or ROUNDING_MODE if rm is omitted.
-         *
-         * Note: as with JavaScript's number type, (-0).toFixed(0) is '0',
-         * but e.g. (-0.00001).toFixed(0) is '-0'.
-         *
-         * [dp] {number} Decimal places. Integer, 0 to MAX inclusive.
-         * [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
-         *
-         * 'toFixed() decimal places not an integer: {dp}'
-         * 'toFixed() decimal places out of range: {dp}'
-         * 'toFixed() rounding mode not an integer: {rm}'
-         * 'toFixed() rounding mode out of range: {rm}'
-         */
-        P.toFixed = function ( dp, rm ) {
-            return format( this, dp != null && isValidInt( dp, 0, MAX, 20 )
-              ? ~~dp + this.e + 1 : null, rm, 20 );
-        };
-
-
-        /*
-         * Return a string representing the value of this BigNumber in fixed-point notation rounded
-         * using rm or ROUNDING_MODE to dp decimal places, and formatted according to the properties
-         * of the FORMAT object (see BigNumber.config).
-         *
-         * FORMAT = {
-         *      decimalSeparator : '.',
-         *      groupSeparator : ',',
-         *      groupSize : 3,
-         *      secondaryGroupSize : 0,
-         *      fractionGroupSeparator : '\xA0',    // non-breaking space
-         *      fractionGroupSize : 0
-         * };
-         *
-         * [dp] {number} Decimal places. Integer, 0 to MAX inclusive.
-         * [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
-         *
-         * 'toFormat() decimal places not an integer: {dp}'
-         * 'toFormat() decimal places out of range: {dp}'
-         * 'toFormat() rounding mode not an integer: {rm}'
-         * 'toFormat() rounding mode out of range: {rm}'
-         */
-        P.toFormat = function ( dp, rm ) {
-            var str = format( this, dp != null && isValidInt( dp, 0, MAX, 21 )
-              ? ~~dp + this.e + 1 : null, rm, 21 );
-
-            if ( this.c ) {
-                var i,
-                    arr = str.split('.'),
-                    g1 = +FORMAT.groupSize,
-                    g2 = +FORMAT.secondaryGroupSize,
-                    groupSeparator = FORMAT.groupSeparator,
-                    intPart = arr[0],
-                    fractionPart = arr[1],
-                    isNeg = this.s < 0,
-                    intDigits = isNeg ? intPart.slice(1) : intPart,
-                    len = intDigits.length;
-
-                if (g2) i = g1, g1 = g2, g2 = i, len -= i;
-
-                if ( g1 > 0 && len > 0 ) {
-                    i = len % g1 || g1;
-                    intPart = intDigits.substr( 0, i );
-
-                    for ( ; i < len; i += g1 ) {
-                        intPart += groupSeparator + intDigits.substr( i, g1 );
-                    }
-
-                    if ( g2 > 0 ) intPart += groupSeparator + intDigits.slice(i);
-                    if (isNeg) intPart = '-' + intPart;
-                }
-
-                str = fractionPart
-                  ? intPart + FORMAT.decimalSeparator + ( ( g2 = +FORMAT.fractionGroupSize )
-                    ? fractionPart.replace( new RegExp( '\\d{' + g2 + '}\\B', 'g' ),
-                      '$&' + FORMAT.fractionGroupSeparator )
-                    : fractionPart )
-                  : intPart;
-            }
-
-            return str;
-        };
-
-
-        /*
-         * Return a string array representing the value of this BigNumber as a simple fraction with
-         * an integer numerator and an integer denominator. The denominator will be a positive
-         * non-zero value less than or equal to the specified maximum denominator. If a maximum
-         * denominator is not specified, the denominator will be the lowest value necessary to
-         * represent the number exactly.
-         *
-         * [md] {number|string|BigNumber} Integer >= 1 and < Infinity. The maximum denominator.
-         *
-         * 'toFraction() max denominator not an integer: {md}'
-         * 'toFraction() max denominator out of range: {md}'
-         */
-        P.toFraction = function (md) {
-            var arr, d0, d2, e, exp, n, n0, q, s,
-                k = ERRORS,
-                x = this,
-                xc = x.c,
-                d = new BigNumber(ONE),
-                n1 = d0 = new BigNumber(ONE),
-                d1 = n0 = new BigNumber(ONE);
-
-            if ( md != null ) {
-                ERRORS = false;
-                n = new BigNumber(md);
-                ERRORS = k;
-
-                if ( !( k = n.isInt() ) || n.lt(ONE) ) {
-
-                    if (ERRORS) {
-                        raise( 22,
-                          'max denominator ' + ( k ? 'out of range' : 'not an integer' ), md );
-                    }
-
-                    // ERRORS is false:
-                    // If md is a finite non-integer >= 1, round it to an integer and use it.
-                    md = !k && n.c && round( n, n.e + 1, 1 ).gte(ONE) ? n : null;
-                }
-            }
-
-            if ( !xc ) return x.toString();
-            s = coeffToString(xc);
-
-            // Determine initial denominator.
-            // d is a power of 10 and the minimum max denominator that specifies the value exactly.
-            e = d.e = s.length - x.e - 1;
-            d.c[0] = POWS_TEN[ ( exp = e % LOG_BASE ) < 0 ? LOG_BASE + exp : exp ];
-            md = !md || n.cmp(d) > 0 ? ( e > 0 ? d : n1 ) : n;
-
-            exp = MAX_EXP;
-            MAX_EXP = 1 / 0;
-            n = new BigNumber(s);
-
-            // n0 = d1 = 0
-            n0.c[0] = 0;
-
-            for ( ; ; )  {
-                q = div( n, d, 0, 1 );
-                d2 = d0.plus( q.times(d1) );
-                if ( d2.cmp(md) == 1 ) break;
-                d0 = d1;
-                d1 = d2;
-                n1 = n0.plus( q.times( d2 = n1 ) );
-                n0 = d2;
-                d = n.minus( q.times( d2 = d ) );
-                n = d2;
-            }
-
-            d2 = div( md.minus(d0), d1, 0, 1 );
-            n0 = n0.plus( d2.times(n1) );
-            d0 = d0.plus( d2.times(d1) );
-            n0.s = n1.s = x.s;
-            e *= 2;
-
-            // Determine which fraction is closer to x, n0/d0 or n1/d1
-            arr = div( n1, d1, e, ROUNDING_MODE ).minus(x).abs().cmp(
-                  div( n0, d0, e, ROUNDING_MODE ).minus(x).abs() ) < 1
-                    ? [ n1.toString(), d1.toString() ]
-                    : [ n0.toString(), d0.toString() ];
-
-            MAX_EXP = exp;
-            return arr;
-        };
-
-
-        /*
-         * Return the value of this BigNumber converted to a number primitive.
-         */
-        P.toNumber = function () {
-            var x = this;
-
-            // Ensure zero has correct sign.
-            return +x || ( x.s ? x.s * 0 : NaN );
-        };
-
-
-        /*
-         * Return a BigNumber whose value is the value of this BigNumber raised to the power n.
-         * If n is negative round according to DECIMAL_PLACES and ROUNDING_MODE.
-         * If POW_PRECISION is not 0, round to POW_PRECISION using ROUNDING_MODE.
-         *
-         * n {number} Integer, -9007199254740992 to 9007199254740992 inclusive.
-         * (Performs 54 loop iterations for n of 9007199254740992.)
-         *
-         * 'pow() exponent not an integer: {n}'
-         * 'pow() exponent out of range: {n}'
-         */
-        P.toPower = P.pow = function (n) {
-            var k, y,
-                i = mathfloor( n < 0 ? -n : +n ),
-                x = this;
-
-            // Pass ±Infinity to Math.pow if exponent is out of range.
-            if ( !isValidInt( n, -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER, 23, 'exponent' ) &&
-              ( !isFinite(n) || i > MAX_SAFE_INTEGER && ( n /= 0 ) ||
-                parseFloat(n) != n && !( n = NaN ) ) ) {
-                return new BigNumber( Math.pow( +x, n ) );
-            }
-
-            // Truncating each coefficient array to a length of k after each multiplication equates
-            // to truncating significant digits to POW_PRECISION + [28, 41], i.e. there will be a
-            // minimum of 28 guard digits retained. (Using + 1.5 would give [9, 21] guard digits.)
-            k = POW_PRECISION ? mathceil( POW_PRECISION / LOG_BASE + 2 ) : 0;
-            y = new BigNumber(ONE);
-
-            for ( ; ; ) {
-
-                if ( i % 2 ) {
-                    y = y.times(x);
-                    if ( !y.c ) break;
-                    if ( k && y.c.length > k ) y.c.length = k;
-                }
-
-                i = mathfloor( i / 2 );
-                if ( !i ) break;
-
-                x = x.times(x);
-                if ( k && x.c && x.c.length > k ) x.c.length = k;
-            }
-
-            if ( n < 0 ) y = ONE.div(y);
-            return k ? round( y, POW_PRECISION, ROUNDING_MODE ) : y;
-        };
-
-
-        /*
-         * Return a string representing the value of this BigNumber rounded to sd significant digits
-         * using rounding mode rm or ROUNDING_MODE. If sd is less than the number of digits
-         * necessary to represent the integer part of the value in fixed-point notation, then use
-         * exponential notation.
-         *
-         * [sd] {number} Significant digits. Integer, 1 to MAX inclusive.
-         * [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
-         *
-         * 'toPrecision() precision not an integer: {sd}'
-         * 'toPrecision() precision out of range: {sd}'
-         * 'toPrecision() rounding mode not an integer: {rm}'
-         * 'toPrecision() rounding mode out of range: {rm}'
-         */
-        P.toPrecision = function ( sd, rm ) {
-            return format( this, sd != null && isValidInt( sd, 1, MAX, 24, 'precision' )
-              ? sd | 0 : null, rm, 24 );
-        };
-
-
-        /*
-         * Return a string representing the value of this BigNumber in base b, or base 10 if b is
-         * omitted. If a base is specified, including base 10, round according to DECIMAL_PLACES and
-         * ROUNDING_MODE. If a base is not specified, and this BigNumber has a positive exponent
-         * that is equal to or greater than TO_EXP_POS, or a negative exponent equal to or less than
-         * TO_EXP_NEG, return exponential notation.
-         *
-         * [b] {number} Integer, 2 to 64 inclusive.
-         *
-         * 'toString() base not an integer: {b}'
-         * 'toString() base out of range: {b}'
-         */
-        P.toString = function (b) {
-            var str,
-                n = this,
-                s = n.s,
-                e = n.e;
-
-            // Infinity or NaN?
-            if ( e === null ) {
-
-                if (s) {
-                    str = 'Infinity';
-                    if ( s < 0 ) str = '-' + str;
-                } else {
-                    str = 'NaN';
-                }
-            } else {
-                str = coeffToString( n.c );
-
-                if ( b == null || !isValidInt( b, 2, 64, 25, 'base' ) ) {
-                    str = e <= TO_EXP_NEG || e >= TO_EXP_POS
-                      ? toExponential( str, e )
-                      : toFixedPoint( str, e );
-                } else {
-                    str = convertBase( toFixedPoint( str, e ), b | 0, 10, s );
-                }
-
-                if ( s < 0 && n.c[0] ) str = '-' + str;
-            }
-
-            return str;
-        };
-
-
-        /*
-         * Return a new BigNumber whose value is the value of this BigNumber truncated to a whole
-         * number.
-         */
-        P.truncated = P.trunc = function () {
-            return round( new BigNumber(this), this.e + 1, 1 );
-        };
-
-
-
-        /*
-         * Return as toString, but do not accept a base argument.
-         */
-        P.valueOf = P.toJSON = function () {
-            return this.toString();
-        };
-
-
-        // Aliases for BigDecimal methods.
-        //P.add = P.plus;         // P.add included above
-        //P.subtract = P.minus;   // P.sub included above
-        //P.multiply = P.times;   // P.mul included above
-        //P.divide = P.div;
-        //P.remainder = P.mod;
-        //P.compareTo = P.cmp;
-        //P.negate = P.neg;
-
-
-        if ( configObj != null ) BigNumber.config(configObj);
-
-        return BigNumber;
-    }
-
-
-    // PRIVATE HELPER FUNCTIONS
-
-
-    function bitFloor(n) {
-        var i = n | 0;
-        return n > 0 || n === i ? i : i - 1;
-    }
-
-
-    // Return a coefficient array as a string of base 10 digits.
-    function coeffToString(a) {
-        var s, z,
-            i = 1,
-            j = a.length,
-            r = a[0] + '';
-
-        for ( ; i < j; ) {
-            s = a[i++] + '';
-            z = LOG_BASE - s.length;
-            for ( ; z--; s = '0' + s );
-            r += s;
-        }
-
-        // Determine trailing zeros.
-        for ( j = r.length; r.charCodeAt(--j) === 48; );
-        return r.slice( 0, j + 1 || 1 );
-    }
-
-
-    // Compare the value of BigNumbers x and y.
-    function compare( x, y ) {
-        var a, b,
-            xc = x.c,
-            yc = y.c,
-            i = x.s,
-            j = y.s,
-            k = x.e,
-            l = y.e;
-
-        // Either NaN?
-        if ( !i || !j ) return null;
-
-        a = xc && !xc[0];
-        b = yc && !yc[0];
-
-        // Either zero?
-        if ( a || b ) return a ? b ? 0 : -j : i;
-
-        // Signs differ?
-        if ( i != j ) return i;
-
-        a = i < 0;
-        b = k == l;
-
-        // Either Infinity?
-        if ( !xc || !yc ) return b ? 0 : !xc ^ a ? 1 : -1;
-
-        // Compare exponents.
-        if ( !b ) return k > l ^ a ? 1 : -1;
-
-        j = ( k = xc.length ) < ( l = yc.length ) ? k : l;
-
-        // Compare digit by digit.
-        for ( i = 0; i < j; i++ ) if ( xc[i] != yc[i] ) return xc[i] > yc[i] ^ a ? 1 : -1;
-
-        // Compare lengths.
-        return k == l ? 0 : k > l ^ a ? 1 : -1;
-    }
-
-
-    /*
-     * Return true if n is a valid number in range, otherwise false.
-     * Use for argument validation when ERRORS is false.
-     * Note: parseInt('1e+1') == 1 but parseFloat('1e+1') == 10.
-     */
-    function intValidatorNoErrors( n, min, max ) {
-        return ( n = truncate(n) ) >= min && n <= max;
-    }
-
-
-    function isArray(obj) {
-        return Object.prototype.toString.call(obj) == '[object Array]';
-    }
-
-
-    /*
-     * Convert string of baseIn to an array of numbers of baseOut.
-     * Eg. convertBase('255', 10, 16) returns [15, 15].
-     * Eg. convertBase('ff', 16, 10) returns [2, 5, 5].
-     */
-    function toBaseOut( str, baseIn, baseOut ) {
-        var j,
-            arr = [0],
-            arrL,
-            i = 0,
-            len = str.length;
-
-        for ( ; i < len; ) {
-            for ( arrL = arr.length; arrL--; arr[arrL] *= baseIn );
-            arr[ j = 0 ] += ALPHABET.indexOf( str.charAt( i++ ) );
-
-            for ( ; j < arr.length; j++ ) {
-
-                if ( arr[j] > baseOut - 1 ) {
-                    if ( arr[j + 1] == null ) arr[j + 1] = 0;
-                    arr[j + 1] += arr[j] / baseOut | 0;
-                    arr[j] %= baseOut;
-                }
-            }
-        }
-
-        return arr.reverse();
-    }
-
-
-    function toExponential( str, e ) {
-        return ( str.length > 1 ? str.charAt(0) + '.' + str.slice(1) : str ) +
-          ( e < 0 ? 'e' : 'e+' ) + e;
-    }
-
-
-    function toFixedPoint( str, e ) {
-        var len, z;
-
-        // Negative exponent?
-        if ( e < 0 ) {
-
-            // Prepend zeros.
-            for ( z = '0.'; ++e; z += '0' );
-            str = z + str;
-
-        // Positive exponent
-        } else {
-            len = str.length;
-
-            // Append zeros.
-            if ( ++e > len ) {
-                for ( z = '0', e -= len; --e; z += '0' );
-                str += z;
-            } else if ( e < len ) {
-                str = str.slice( 0, e ) + '.' + str.slice(e);
-            }
-        }
-
-        return str;
-    }
-
-
-    function truncate(n) {
-        n = parseFloat(n);
-        return n < 0 ? mathceil(n) : mathfloor(n);
-    }
-
-
-    // EXPORT
-
-
-    BigNumber = another();
-
-    // AMD.
-    if ( typeof define == 'function' && define.amd ) {
-        define( function () { return BigNumber; } );
+'use strict';
 
-    // Node and other environments that support module.exports.
-    } else if ( typeof module != 'undefined' && module.exports ) {
-        module.exports = BigNumber;
-        if ( !crypto ) try { crypto = require('crypto'); } catch (e) {}
+module.exports = BigNumber; // jshint ignore:line
 
-    // Browser.
-    } else {
-        global.BigNumber = BigNumber;
-    }
-})(this);
 
-},{"crypto":31}],"web3":[function(require,module,exports){
+},{}],"web3":[function(require,module,exports){
 var web3 = require('./lib/web3');
 web3.providers.HttpProvider = require('./lib/web3/httpprovider');
 web3.providers.QtSyncProvider = require('./lib/web3/qtsync');
@@ -8286,5 +5687,5 @@ module.exports = web3;
 },{"./lib/web3":9,"./lib/web3/contract":11,"./lib/web3/httpprovider":19,"./lib/web3/namereg":23,"./lib/web3/qtsync":26,"./lib/web3/transfer":29}]},{},["web3"])
 
 
-//# sourceMappingURL=web3.js.map
+//# sourceMappingURL=web3-light.js.map
 `
\ No newline at end of file
diff --git a/rpc/api/admin_js.go b/rpc/api/admin_js.go
index 02a0e93e1..6255a6c7b 100644
--- a/rpc/api/admin_js.go
+++ b/rpc/api/admin_js.go
@@ -1,66 +1,66 @@
 package api
 
 const Admin_JS = `
-web3.extend({
+web3._extend({
 	property: 'admin',
 	methods:
 	[
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'addPeer',
 			call: 'admin_addPeer',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.utils.formatInputString],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'peers',
 			call: 'admin_peers',
 			params: 0,
 			inputFormatter: [],
 			outputFormatter: function(obj) { return obj; }
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'exportChain',
 			call: 'admin_exportChain',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
+			inputFormatter: [web3._extend.utils.formatInputString],
 			outputFormatter: function(obj) { return obj; }
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'importChain',
 			call: 'admin_importChain',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
+			inputFormatter: [web3._extend.utils.formatInputString],
 			outputFormatter: function(obj) { return obj; }
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'verbosity',
 			call: 'admin_verbosity',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.utils.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'syncStatus',
 			call: 'admin_syncStatus',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputInt],
+			inputFormatter: [web3._extend.utils.formatInputInt],
 			outputFormatter: function(obj) { return obj; }
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'setSolc',
 			call: 'admin_setSolc',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			inputFormatter: [web3._extend.utils.formatInputString],
+			outputFormatter: web3._extend.formatters.formatOutputString
 		})
 	],
 	properties:
 	[
-		new web3.extend.Property({
+		new web3._extend.Property({
 			name: 'nodeInfo',
 			getter: 'admin_nodeInfo',
-			outputFormatter: web3.extend.formatters.formatOutputString
+			outputFormatter: web3._extend.formatters.formatOutputString
 		})
 	]
 });
diff --git a/rpc/api/debug_js.go b/rpc/api/debug_js.go
index 43c545b2a..fe19a077d 100644
--- a/rpc/api/debug_js.go
+++ b/rpc/api/debug_js.go
@@ -1,44 +1,44 @@
 package api
 
 const Debug_JS = `
-web3.extend({
+web3._extend({
 	property: 'debug',
 	methods:
 	[
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'printBlock',
 			call: 'debug_printBlock',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			inputFormatter: [web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputString
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'getBlockRlp',
 			call: 'debug_getBlockRlp',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			inputFormatter: [web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputString
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'setHead',
 			call: 'debug_setHead',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'processBlock',
 			call: 'debug_processBlock',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
+			inputFormatter: [web3._extend.formatters.formatInputInt],
 			outputFormatter: function(obj) { return obj; }
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'seedHash',
 			call: 'debug_seedHash',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			inputFormatter: [web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputString
 		})
 	],
 	properties:
diff --git a/rpc/api/miner_js.go b/rpc/api/miner_js.go
index f1c64c5e8..bcf92f6a7 100644
--- a/rpc/api/miner_js.go
+++ b/rpc/api/miner_js.go
@@ -1,73 +1,73 @@
 package api
 
 const Miner_JS = `
-web3.extend({
+web3._extend({
 	property: 'miner',
 	methods:
 	[
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'start',
 			call: 'miner_start',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'stop',
 			call: 'miner_stop',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'getHashrate',
 			call: 'miner_hashrate',
 			params: 0,
 			inputFormatter: [],
-			outputFormatter: web3.extend.utils.toDecimal
+			outputFormatter: web3._extend.utils.toDecimal
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'setExtra',
 			call: 'miner_setExtra',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.utils.formatInputString],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'setGasPrice',
 			call: 'miner_setGasPrice',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.utils.formatInputString],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'startAutoDAG',
 			call: 'miner_startAutoDAG',
 			params: 0,
 			inputFormatter: [],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'stopAutoDAG',
 			call: 'miner_stopAutoDAG',
 			params: 0,
 			inputFormatter: [],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'makeDAG',
 			call: 'miner_makeDAG',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.inputDefaultBlockNumberFormatter],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.formatters.inputDefaultBlockNumberFormatter],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		})
 	],
 	properties:
 	[
-		new web3.extend.Property({
+		new web3._extend.Property({
 			name: 'hashrate',
 			getter: 'miner_hashrate',
-			outputFormatter: web3.extend.utils.toDecimal
+			outputFormatter: web3._extend.utils.toDecimal
 		})
 	]
 });
diff --git a/rpc/api/net_js.go b/rpc/api/net_js.go
index 2fae69c58..75f6c89f3 100644
--- a/rpc/api/net_js.go
+++ b/rpc/api/net_js.go
@@ -1,32 +1,32 @@
 package api
 
 const Net_JS = `
-web3.extend({
+web3._extend({
 	property: 'network',
 	methods:
 	[
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'addPeer',
 			call: 'net_addPeer',
 			params: 1,
-			inputFormatter: [web3.extend.utils.formatInputString],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.utils.formatInputString],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'id',
 			call: 'net_id',
 			params: 0,
 			inputFormatter: [],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			outputFormatter: web3._extend.formatters.formatOutputString
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'getPeerCount',
 			call: 'net_peerCount',
 			params: 0,
 			inputFormatter: [],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			outputFormatter: web3._extend.formatters.formatOutputString
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'peers',
 			call: 'net_peers',
 			params: 0,
@@ -36,15 +36,15 @@ web3.extend({
 	],
 	properties:
 	[
-		new web3.extend.Property({
+		new web3._extend.Property({
 			name: 'listening',
 			getter: 'net_listening',
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		}),
-		new web3.extend.Property({
+		new web3._extend.Property({
 			name: 'peerCount',
 			getter: 'net_peerCount',
-			outputFormatter: web3.extend.utils.toDecimal
+			outputFormatter: web3._extend.utils.toDecimal
 		})
 	]
 });
diff --git a/rpc/api/personal_js.go b/rpc/api/personal_js.go
index 7fd9a2dea..f9fa60e78 100644
--- a/rpc/api/personal_js.go
+++ b/rpc/api/personal_js.go
@@ -1,30 +1,30 @@
 package api
 
 const Personal_JS = `
-web3.extend({
+web3._extend({
 	property: 'personal',
 	methods:
 	[
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'listAccounts',
 			call: 'personal_listAccounts',
 			params: 0,
 			inputFormatter: [],
 			outputFormatter: function(obj) { return obj; }
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'newAccount',
 			call: 'personal_newAccount',
 			params: 1,
-			inputFormatter: [web3.extend.formatters.formatInputString],
-			outputFormatter: web3.extend.formatters.formatOutputString
+			inputFormatter: [web3._extend.formatters.formatInputString],
+			outputFormatter: web3._extend.formatters.formatOutputString
 		}),
-		new web3.extend.Method({
+		new web3._extend.Method({
 			name: 'unlockAccount',
 			call: 'personal_unlockAccount',
 			params: 3,
-			inputFormatter: [web3.extend.formatters.formatInputString,web3.extend.formatters.formatInputString,web3.extend.formatters.formatInputInt],
-			outputFormatter: web3.extend.formatters.formatOutputBool
+			inputFormatter: [web3._extend.formatters.formatInputString,web3._extend.formatters.formatInputString,web3._extend.formatters.formatInputInt],
+			outputFormatter: web3._extend.formatters.formatOutputBool
 		})
 	],
 	properties: