Merge pull request #15 from 0xProject/rm-ts

Remove typescript folder

1 files changed, 134 insertions, 0 deletions

diff --git a/src/0x.js.ts b/src/0x.js.ts
new file mode 100644
index 000000000..1ebafc604
--- /dev/null
+++ b/src/0x.js.ts
@@ -0,0 +1,134 @@
+import * as _ from 'lodash';
+import * as BigNumber from 'bignumber.js';
+import * as ethUtil from 'ethereumjs-util';
+import contract = require('truffle-contract');
+import * as Web3 from 'web3';
+import * as ethABI from 'ethereumjs-abi';
+import {Web3Wrapper} from './web3_wrapper';
+import {constants} from './utils/constants';
+import {utils} from './utils/utils';
+import {assert} from './utils/assert';
+import {ExchangeWrapper} from './contract_wrappers/exchange_wrapper';
+import {ECSignatureSchema} from './schemas/ec_signature_schema';
+import {SolidityTypes, ECSignature} from './types';
+
+const MAX_DIGITS_IN_UNSIGNED_256_INT = 78;
+
+export class ZeroEx {
+    public web3Wrapper: Web3Wrapper;
+    public exchange: ExchangeWrapper;
+    /**
+     * Computes the orderHash given the order parameters and returns it as a hex encoded string.
+     */
+    public static getOrderHashHex(exchangeContractAddr: string, makerAddr: string, takerAddr: string,
+                                  tokenMAddress: string, tokenTAddress: string, feeRecipient: string,
+                                  valueM: BigNumber.BigNumber, valueT: BigNumber.BigNumber,
+                                  makerFee: BigNumber.BigNumber, takerFee: BigNumber.BigNumber,
+                                  expiration: BigNumber.BigNumber, salt: BigNumber.BigNumber): string {
+        takerAddr = _.isEmpty(takerAddr) ? constants.NULL_ADDRESS : takerAddr ;
+        assert.isETHAddressHex('exchangeContractAddr', exchangeContractAddr);
+        assert.isETHAddressHex('makerAddr', makerAddr);
+        assert.isETHAddressHex('takerAddr', takerAddr);
+        assert.isETHAddressHex('tokenMAddress', tokenMAddress);
+        assert.isETHAddressHex('tokenTAddress', tokenTAddress);
+        assert.isETHAddressHex('feeRecipient', feeRecipient);
+        assert.isBigNumber('valueM', valueM);
+        assert.isBigNumber('valueT', valueT);
+        assert.isBigNumber('makerFee', makerFee);
+        assert.isBigNumber('takerFee', takerFee);
+        assert.isBigNumber('expiration', expiration);
+        assert.isBigNumber('salt', salt);
+
+        const orderParts = [
+            {value: exchangeContractAddr, type: SolidityTypes.address},
+            {value: makerAddr, type: SolidityTypes.address},
+            {value: takerAddr, type: SolidityTypes.address},
+            {value: tokenMAddress, type: SolidityTypes.address},
+            {value: tokenTAddress, type: SolidityTypes.address},
+            {value: feeRecipient, type: SolidityTypes.address},
+            {value: utils.bigNumberToBN(valueM), type: SolidityTypes.uint256},
+            {value: utils.bigNumberToBN(valueT), type: SolidityTypes.uint256},
+            {value: utils.bigNumberToBN(makerFee), type: SolidityTypes.uint256},
+            {value: utils.bigNumberToBN(takerFee), type: SolidityTypes.uint256},
+            {value: utils.bigNumberToBN(expiration), type: SolidityTypes.uint256},
+            {value: utils.bigNumberToBN(salt), type: SolidityTypes.uint256},
+        ];
+        const types = _.map(orderParts, o => o.type);
+        const values = _.map(orderParts, o => o.value);
+        const hashBuff = ethABI.soliditySHA3(types, values);
+        const hashHex = ethUtil.bufferToHex(hashBuff);
+        return hashHex;
+    }
+    /**
+     * Verifies that the elliptic curve signature `signature` was generated
+     * by signing `data` with the private key corresponding to the `signerAddressHex` address.
+     */
+    public static isValidSignature(dataHex: string, signature: ECSignature, signerAddressHex: string): boolean {
+        assert.isHexString('dataHex', dataHex);
+        assert.doesConformToSchema('signature', signature, ECSignatureSchema);
+        assert.isETHAddressHex('signerAddressHex', signerAddressHex);
+
+        const dataBuff = ethUtil.toBuffer(dataHex);
+        const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
+        try {
+            const pubKey = ethUtil.ecrecover(
+                msgHashBuff,
+                signature.v,
+                ethUtil.toBuffer(signature.r),
+                ethUtil.toBuffer(signature.s));
+            const retrievedAddress = ethUtil.bufferToHex(ethUtil.pubToAddress(pubKey));
+            return retrievedAddress === signerAddressHex;
+        } catch (err) {
+            return false;
+        }
+    }
+    /**
+     * Generates pseudo-random 256 bit salt.
+     * The salt is used to ensure that the 0x order generated has a unique orderHash that does
+     * not collide with any other outstanding orders.
+     */
+    public static generatePseudoRandomSalt(): BigNumber.BigNumber {
+        // BigNumber.random returns a pseudo-random number between 0 & 1 with a passed in number of decimal places.
+        // Source: https://mikemcl.github.io/bignumber.js/#random
+        const randomNumber = BigNumber.random(MAX_DIGITS_IN_UNSIGNED_256_INT);
+        const factor = new BigNumber(10).pow(MAX_DIGITS_IN_UNSIGNED_256_INT - 1);
+        const salt = randomNumber.times(factor).round();
+        return salt;
+    }
+    /** Checks if order hash is valid */
+    public static isValidOrderHash(orderHash: string): boolean {
+        assert.isString('orderHash', orderHash);
+        const isValid = /^0x[0-9A-F]{64}$/i.test(orderHash);
+        return isValid;
+    }
+    /*
+     * A unit amount is defined as the amount of a token above the specified decimal places (integer part).
+     * E.g: If a currency has 18 decimal places, 1e18 or one quintillion of the currency is equivalent
+     * to 1 unit.
+    */
+    public static toUnitAmount(amount: BigNumber.BigNumber, decimals: number): BigNumber.BigNumber {
+        assert.isBigNumber('amount', amount);
+        assert.isNumber('decimals', decimals);
+
+        const aUnit = new BigNumber(10).pow(decimals);
+        const unit = amount.div(aUnit);
+        return unit;
+    }
+    /*
+     * A baseUnit is defined as the smallest denomination of a token. An amount expressed in baseUnits
+     * is the amount expressed in the smallest denomination.
+     * E.g: 1 unit of a token with 18 decimal places is expressed in baseUnits as 1000000000000000000
+    */
+    public static toBaseUnitAmount(amount: BigNumber.BigNumber, decimals: number): BigNumber.BigNumber {
+        assert.isBigNumber('amount', amount);
+        assert.isNumber('decimals', decimals);
+
+        const unit = new BigNumber(10).pow(decimals);
+        const baseUnitAmount = amount.times(unit);
+        return baseUnitAmount;
+    }
+    constructor(web3: Web3) {
+        this.web3Wrapper = new Web3Wrapper(web3);
+        this.exchange = new ExchangeWrapper(this.web3Wrapper);
+    }
+}