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authorGreg Hysen <greg.hysen@gmail.com>2018-11-10 08:21:31 +0800
committerGreg Hysen <greg.hysen@gmail.com>2018-11-29 08:38:10 +0800
commit78498b7019e02a9b280cc1ffe9fafbf30bff24ec (patch)
tree091721beace148bba13633acbc170b75debc6988
parent1ca23b35ab067ed59a5d19543ceec646272e77a3 (diff)
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Initial port -- wont compile yet
-rw-r--r--packages/order-utils/test/abi/abi_encoder.ts1
-rw-r--r--packages/order-utils/test/abi/calldata.ts177
-rw-r--r--packages/order-utils/test/abi/config.ts4
-rw-r--r--packages/order-utils/test/abi/data_type.ts278
-rw-r--r--packages/order-utils/test/abi/evm_data_types.ts439
5 files changed, 899 insertions, 0 deletions
diff --git a/packages/order-utils/test/abi/abi_encoder.ts b/packages/order-utils/test/abi/abi_encoder.ts
new file mode 100644
index 000000000..12755209a
--- /dev/null
+++ b/packages/order-utils/test/abi/abi_encoder.ts
@@ -0,0 +1 @@
+export * from './calldata_block'; \ No newline at end of file
diff --git a/packages/order-utils/test/abi/calldata.ts b/packages/order-utils/test/abi/calldata.ts
new file mode 100644
index 000000000..dc0fcfb2b
--- /dev/null
+++ b/packages/order-utils/test/abi/calldata.ts
@@ -0,0 +1,177 @@
+import ethUtil = require('ethereumjs-util');
+var _ = require('lodash');
+
+export abstract class CalldataBlock {
+ private name: string;
+ private signature: string;
+ private offsetInBytes: number;
+ private headerSizeInBytes: number;
+ private bodySizeInBytes: number;
+ private relocatable: boolean;
+
+ constructor(name: string, signature: string, offsetInBytes: number, headerSizeInBytes: number, bodySizeInBytes: number, relocatable: boolean) {
+ this.name = name;
+ this.signature = signature;
+ this.offsetInBytes = offsetInBytes;
+ this.headerSizeInBytes = headerSizeInBytes;
+ this.bodySizeInBytes = bodySizeInBytes;
+ this.relocatable = relocatable;
+ }
+
+ public getName(): string {
+ return this.name;
+ }
+
+ public getSignature(): string {
+ return this.signature;
+ }
+
+ public isRelocatable(): boolean {
+ return this.relocatable;
+ }
+
+ public getHeaderSizeInBytes(): number {
+ return this.headerSizeInBytes;
+ }
+
+ public getBodySizeInBytes(): number {
+ return this.bodySizeInBytes;
+ }
+
+ public getSizeInBytes(): number {
+ return this.headerSizeInBytes + this.bodySizeInBytes;
+ }
+
+ public getOffsetInBytes(): number {
+ return this.offsetInBytes;
+ }
+
+ public abstract toHexString(): string;
+}
+
+export class PayloadCalldataBlock extends CalldataBlock {
+ private payload: Buffer;
+
+ constructor(name: string, signature: string, offsetInBytes: number, relocatable: boolean, payload: Buffer) {
+ const headerSizeInBytes = 0;
+ const bodySizeInBytes = payload.byteLength;
+ super(name, signature, offsetInBytes, headerSizeInBytes, bodySizeInBytes, relocatable);
+ this.payload = payload;
+ }
+
+ public toHexString(): string {
+ const payloadHex = ethUtil.bufferToHex(this.payload);
+ return payloadHex;
+ }
+}
+
+export class DependentCalldataBlock extends CalldataBlock {
+ public static DEPENDENT_PAYLOAD_SIZE_IN_BYTES = 32;
+ private parent: CalldataBlock;
+ private dependency: CalldataBlock;
+
+ constructor(name: string, signature: string, offsetInBytes: number, relocatable: boolean, parent: CalldataBlock, dependency: CalldataBlock) {
+ const headerSizeInBytes = 0;
+ const bodySizeInBytes = DependentCalldataBlock.DEPENDENT_PAYLOAD_SIZE_IN_BYTES;
+ super(name, signature, offsetInBytes, headerSizeInBytes, bodySizeInBytes, relocatable);
+ this.parent = parent;
+ this.dependency = dependency;
+ }
+
+ public toHexString(): string {
+ const dependencyOffset = this.dependency.getOffsetInBytes();
+ const parentOffset = this.parent.getOffsetInBytes();
+ const parentHeaderSize = this.parent.getHeaderSizeInBytes();
+ const pointer = dependencyOffset - parentOffset + parentHeaderSize;
+ const pointerBuf = new Buffer(`0x${pointer.toString(16)}`);
+ const evmWordWidthInBytes = 32;
+ const pointerBufPadded = ethUtil.setLengthLeft(pointerBuf, evmWordWidthInBytes);
+ const pointerHex = ethUtil.bufferToHex(pointerBufPadded);
+ return pointerHex;
+ }
+}
+
+export class MemberCalldataBlock extends CalldataBlock {
+ private static DEPENDENT_PAYLOAD_SIZE_IN_BYTES = 32;
+ private header: Buffer | undefined;
+ private members: CalldataBlock[];
+
+ constructor(name: string, signature: string, offsetInBytes: number, relocatable: boolean, members: CalldataBlock[], header?: Buffer) {
+ const headerSizeInBytes = (header === undefined) ? 0 : header.byteLength;
+ let bodySizeInBytes = 0;
+ _.each(members, (member: Memblock) => {
+ bodySizeInBytes += member.getSizeInBytes();
+ });
+
+ super(name, signature, offsetInBytes, headerSizeInBytes, bodySizeInBytes, relocatable);
+ this.members = members;
+ this.header = header;
+ }
+
+ public toHexString(): string {
+ let valueBuffers: Buffer[] = [];
+ if (this.header !== undefined) valueBuffers.push(this.header);
+ _.each(this.members, (member: CalldataBlock) => {
+ const memberHexString = member.toHexString();
+ const memberBuf = ethUtil.toBuffer(memberHexString);
+ valueBuffers.push(memberBuf);
+ });
+ const combinedValueBufs = Buffer.concat(valueBuffers);
+ const combinedValuesAsHex = ethUtil.bufferToHex(combinedValueBufs);
+ return combinedValuesAsHex;
+ }
+}
+
+export class Calldata {
+ private selector: string;
+ private sizeInBytes: number;
+ private blocks: CalldataBlock[];
+
+ constructor() {
+ this.selector = '0x';
+ this.sizeInBytes = 0;
+ this.blocks = [];
+ }
+
+ public toHexString(): string {
+ let calldataString = `${this.selector}`;
+ _.each(this.blocks, (block: CalldataBlock) => {
+ const blockAsHexString = block.toHexString();
+ const blockAsHexWithoutPrefix = ethUtil.stripHexPrefix(blockAsHexString);
+ calldataString += blockAsHexWithoutPrefix;
+ });
+ return calldataString;
+ }
+
+ public getSelectorHex(): string {
+ return this.selector;
+ }
+
+ public getSizeInBytes(): number {
+ return this.sizeInBytes;
+ }
+
+ public toAnnotatedString(): string {
+ return "";
+ }
+
+ public pushBlock(block: CalldataBlock) {
+ this.blocks.push(block);
+ this.sizeInBytes += block.getSizeInBytes();
+ }
+
+ public setSelector(selector: string) {
+ // Ensure we have a 0x prefix
+ if (selector.startsWith('0x')) {
+ this.selector = selector;
+ } else {
+ this.selector = `$0x${selector}`;
+ }
+
+ // The selector must be 10 characters: '0x' followed by 4 bytes (two hex chars per byte)
+ if (this.selector.length !== 10) {
+ throw new Error(`Invalid selector '${this.selector}'`);
+ }
+ this.sizeInBytes += 8;
+ }
+} \ No newline at end of file
diff --git a/packages/order-utils/test/abi/config.ts b/packages/order-utils/test/abi/config.ts
new file mode 100644
index 000000000..015cee59a
--- /dev/null
+++ b/packages/order-utils/test/abi/config.ts
@@ -0,0 +1,4 @@
+import { DataTypeFactory } from './data_type';
+import { EvmDataTypeFactoryImpl } from './evm_data_types';
+
+DataTypeFactory.setImpl(new EvmDataTypeFactoryImpl()); \ No newline at end of file
diff --git a/packages/order-utils/test/abi/data_type.ts b/packages/order-utils/test/abi/data_type.ts
new file mode 100644
index 000000000..f74621085
--- /dev/null
+++ b/packages/order-utils/test/abi/data_type.ts
@@ -0,0 +1,278 @@
+import { Calldata, CalldataBlock, PayloadCalldataBlock, DependentCalldataBlock } from "./calldata";
+import { MethodAbi, DataItem } from 'ethereum-types';
+import { BigNumber } from '@0x/utils';
+import ethUtil = require('ethereumjs-util');
+var _ = require('lodash');
+
+
+
+export abstract class DataType {
+ private dataItem: DataItem;
+
+ constructor(dataItem: DataItem) {
+ this.dataItem = dataItem;
+ }
+
+ public getDataItem(): DataItem {
+ return this.dataItem;
+ }
+
+ protected abstract createCalldataBlock(): CalldataBlock;
+ public abstract encode(value: any, calldata: Calldata): void;
+ public abstract getSignature(): string;
+ public abstract isStatic(): boolean;
+}
+
+export abstract class PayloadDataType extends DataType {
+ protected hasConstantSize: boolean;
+
+ public constructor(dataItem: DataItem, hasConstantSize: boolean) {
+ super(dataItem);
+ this.hasConstantSize = hasConstantSize;
+ }
+
+ protected generateCalldataBlock(payload: Buffer, calldata: Calldata): void {
+ const name = this.getDataItem().name;
+ const signature = this.getSignature();
+ const offsetInBytes = calldata.getSizeInBytes();
+ const relocatable = false;
+ const block = new PayloadCalldataBlock(name, signature, offsetInBytes, relocatable, payload);
+ calldata.pushBlock(block);
+ }
+
+ public isStatic(): boolean {
+ // If a payload has a constant size then it's static
+ return this.hasConstantSize;
+ }
+}
+
+export abstract class DependentDataType extends DataType {
+ protected dependency: DataType;
+ protected parent: DataType;
+
+ public constructor(dataItem: DataItem, dependency: DataType, parent: DataType) {
+ super(dataItem);
+ this.dependency = dependency;
+ this.parent = parent;
+ }
+
+ protected generateCalldataBlock(offsetInBytes: number, calldata: Calldata): CalldataBlock {
+ const name = this.getDataItem().name;
+ const signature = this.getSignature();
+ const relocatable = false;
+ const parentBlock = calldata.lookupBlockByName(this.parent.getDataItem().name);
+ const dependencyBlock = calldata.lookupBlockByName(this.parent.getDataItem().name);
+ const block = new DependentCalldataBlock(name, signature, offsetInBytes, relocatable, dependencyBlock, parentBlock);
+ calldata.pushBlock(block);
+ }
+
+ public encode(value: any, calldata: Calldata = new Calldata()): void {
+ const offsetInBytes = calldata.reserveSpace(DependentCalldataBlock.DEPENDENT_PAYLOAD_SIZE_IN_BYTES);
+ this.dependency.encode(value, calldata);
+ this.generateCalldataBlock(offsetInBytes, calldata);
+ }
+
+ public isStatic(): boolean {
+ return true;
+ }
+}
+
+export interface MemberMap {
+ [key: string]: number;
+}
+
+export abstract class MemberDataType extends DataType {
+ private memberMap: MemberMap;
+ private members: DataType[];
+ private isArray: boolean;
+ protected arrayLength: number | undefined;
+
+
+ public constructor(dataItem: DataItem, isArray: boolean = false, arrayLength?: number) {
+ super(dataItem);
+
+ this.memberMap = {};
+ this.members = [];
+ this.isArray = isArray;
+ this.arrayLength = arrayLength;
+ if (isArray && arrayLength !== undefined) {
+ [this.members, this.memberMap] = MemberDataType.createMembersWithLength(arrayLength);
+ } else if (!isArray) {
+ [this.members, this.memberMap] = MemberDataType.createMembersWithKeys(dataItem);
+ }
+ }
+
+ private static createMembersWithKeys(dataItem: DataItem): [DataType[], MemberMap] {
+ // Sanity check
+ if (dataItem.components === undefined) {
+ throw new Error(`Expected components`);
+ }
+
+ let members: DataType[] = [];
+ let memberMap: MemberMap = {};
+ _.each(dataItem.components, (dataItem: DataItem) => {
+ const childDataItem = {
+ type: dataItem.type,
+ name: `${dataItem.name}.${dataItem.name}`,
+ } as DataItem;
+ const child = DataTypeFactory.create(childDataItem, this);
+ members.push(child);
+ memberMap[dataItem.name] = members.length;
+ });
+
+ return [members, memberMap];
+ }
+
+ private static createMembersWithLength(dataItem: DataItem, length: number): [DataType[], MemberMap] {
+ let members: DataType[] = [];
+ let memberMap: MemberMap = {};
+ const range = _.range(length);
+ _.each(range, (idx: number) => {
+ const childDataItem = {
+ type: this.type,
+ name: `${dataItem.name}[${idx.toString(10)}]`,
+ } as DataItem;
+ const components = dataItem.components;
+ if (components !== undefined) {
+ childDataItem.components = components;
+ }
+ const child = DataTypeFactory.create(childDataItem, this);
+ members.push(child);
+ memberMap[idx.toString(10)] = members.length;
+ });
+
+ return [members, memberMap];
+ }
+
+ protected encodeFromArray(value: any[], calldata: Calldata) {
+ // Sanity check length
+ const valueLength = new BigNumber(value.length);
+ if (this.length !== SolArray.UNDEFINED_LENGTH && valueLength.equals(this.length) === false) {
+ throw new Error(
+ `Expected array of ${JSON.stringify(
+ this.length,
+ )} elements, but got array of length ${JSON.stringify(valueLength)}`,
+ );
+ }
+
+ // Assign values to children
+ for (let idx = new BigNumber(0); idx.lessThan(this.length); idx = idx.plus(1)) {
+ const idxNumber = idx.toNumber();
+ this.members[idxNumber].assignValue(value[idxNumber]);
+ }
+ }
+
+ protected encodeFromObject(obj: object, calldata: Calldata) {
+ let childMap = _.cloneDeep(this.memberMap);
+ _.forOwn(obj, (value: any, key: string) => {
+ if (key in childMap === false) {
+ throw new Error(`Could not assign tuple to object: unrecognized key '${key}'`);
+ }
+ this.members[this.childMap[key]].assignValue(value);
+ delete childMap[key];
+ });
+
+ if (Object.keys(childMap).length !== 0) {
+ throw new Error(`Could not assign tuple to object: missing keys ${Object.keys(childMap)}`);
+ }
+ }
+
+ public encode(value: any[] | object, calldata = new Calldata()) {
+ if (value instanceof Array) {
+ this.encodeFromArray(value, calldata);
+ } else if (typeof value === 'object') {
+ this.encodeFromObject(value, encodeFromObject);
+ } else {
+ throw new Error(`Unexpected type for ${value}`);
+ }
+ }
+
+ protected generateCalldataBlock(offsetInBytes: number, calldata: Calldata): CalldataBlock {
+ const name = this.getDataItem().name;
+ const signature = this.getSignature();
+ const relocatable = false;
+ const parentBlock = calldata.lookupBlockByName(this.parent.getDataItem().name);
+ const dependencyBlock = calldata.lookupBlockByName(this.parent.getDataItem().name);
+ const block = new DependentCalldataBlock(name, signature, offsetInBytes, relocatable, dependencyBlock, parentBlock);
+ calldata.pushBlock(block);
+ }
+
+ protected computeSignatureOfMembers(): string {
+ // Compute signature of members
+ let signature = `(`;
+ _.each(this.members, (member: DataType, i: number) => {
+ signature += member.getSignature();
+ if (i < this.members.length - 1) {
+ signature += ',';
+ }
+ });
+ signature += ')';
+ return signature;
+ }
+
+ public isStatic(): boolean {
+ /* For Tuple:
+ const isStaticTuple = this.children.length === 0;
+ return isStaticTuple; // @TODO: True in every case or only when dynamic data?
+
+ For Array:
+ if isLengthDefined = false then this is false
+
+ Otherwise if the first element is a Pointer then false
+ */
+
+ if (this.isArray && this.arrayLength === undefined) {
+ return true;
+ }
+
+ // Search for dependent members
+ const dependentMember = _.find(this.members, (member: DataType) => {
+ return (member instanceof DependentDataType);
+ });
+ const isStatic = (dependentMember === undefined); // static if we couldn't find a dependent member
+ return isStatic;
+ }
+}
+
+export interface DataTypeFactoryImpl {
+ create: (dataItem: DataItem, parentDataType: DataType) => DataType;
+ mapDataItemToDataType: (dataItem: DataItem) => DataType;
+}
+
+export class DataTypeFactory {
+ private static instance: DataTypeFactory;
+ private provider: DataTypeFactoryImpl | undefined;
+
+ private constructor() { }
+
+ private static getInstance(): DataTypeFactory {
+ if (!DataTypeFactory.instance) {
+ DataTypeFactory.instance = new DataTypeFactory();
+ }
+ return DataTypeFactory.instance;
+ }
+
+ public static setImpl(provider: DataTypeFactoryImpl) {
+ const instance = DataTypeFactory.getInstance();
+ if (instance.provider !== undefined) {
+ throw new Error(`Tried to set implementation more than once`);
+ }
+ DataTypeFactory.getInstance().provider = provider;
+ }
+
+ public static create(dataItem: DataItem, parentDataType: DataType): DataType {
+ const instance = DataTypeFactory.getInstance();
+ if (instance.provider === undefined) {
+ throw new Error(`Tried to create before implementation is set`);
+ }
+ return instance.provider.create(dataItem, parentDataType);
+ }
+
+ public static mapDataItemToDataType(dataItem: DataItem): DataType {
+ const instance = DataTypeFactory.getInstance();
+ if (instance.provider === undefined) {
+ throw new Error(`Tried to create before implementation is set`);
+ }
+ return instance.provider.mapDataItemToDataType(dataItem);
+ }
+} \ No newline at end of file
diff --git a/packages/order-utils/test/abi/evm_data_types.ts b/packages/order-utils/test/abi/evm_data_types.ts
new file mode 100644
index 000000000..4e42a992a
--- /dev/null
+++ b/packages/order-utils/test/abi/evm_data_types.ts
@@ -0,0 +1,439 @@
+import { DataType, DataTypeFactory, DataTypeFactoryImpl, PayloadDataType, DependentDataType, MemberDataType } from './data_type';
+
+import { MethodAbi, DataItem } from 'ethereum-types';
+
+import ethUtil = require('ethereumjs-util');
+
+import { BigNumber } from '@0x/utils';
+
+export interface DataTypeStaticInterface {
+ matchGrammar: (type: string) => boolean;
+ encodeValue: (value: any) => Buffer;
+}
+
+export class Address extends PayloadDataType {
+ private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+
+ constructor(dataItem: DataItem) {
+ super(dataItem, Address.SIZE_KNOWN_AT_COMPILE_TIME);
+ if (!Address.matchGrammar(dataItem.type)) {
+ throw new Error(`Tried to instantiate Address with bad input: ${dataItem}`);
+ }
+ }
+
+ public getSignature(): string {
+ return 'address';
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return type === 'address';
+ }
+
+ public static encodeValue(value: boolean): Buffer {
+ const evmWordWidth = 32;
+ const encodedValueBuf = ethUtil.setLengthLeft(ethUtil.toBuffer(value), evmWordWidth);
+ return encodedValueBuf;
+ }
+}
+
+export class Bool extends PayloadDataType {
+ private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+
+ constructor(dataItem: DataItem) {
+ super(dataItem, Bool.SIZE_KNOWN_AT_COMPILE_TIME);
+ if (!Bool.matchGrammar(dataItem.type)) {
+ throw new Error(`Tried to instantiate Bool with bad input: ${dataItem}`);
+ }
+ }
+
+ public getSignature(): string {
+ return 'bool';
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return type === 'bool';
+ }
+
+ public static encodeValue(value: boolean): Buffer {
+ const evmWordWidth = 32;
+ const encodedValue = value === true ? '0x1' : '0x0';
+ const encodedValueBuf = ethUtil.setLengthLeft(ethUtil.toBuffer(encodedValue), evmWordWidth);
+ return encodedValueBuf;
+ }
+}
+
+abstract class Number extends PayloadDataType {
+ private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+ static MAX_WIDTH: number = 256;
+ static DEFAULT_WIDTH: number = Number.MAX_WIDTH;
+ width: number = Number.DEFAULT_WIDTH;
+
+ constructor(dataItem: DataItem, matcher: RegExp) {
+ super(dataItem, Number.SIZE_KNOWN_AT_COMPILE_TIME);
+ const matches = matcher.exec(dataItem.type);
+ if (matches === null) {
+ throw new Error(`Tried to instantiate Number with bad input: ${dataItem}`);
+ }
+ if (matches !== null && matches.length === 2 && matches[1] !== undefined) {
+ this.width = parseInt(matches[1]);
+ } else {
+ this.width = 256;
+ }
+ }
+
+ public static encodeValue(value: BigNumber): Buffer {
+ if (value.greaterThan(this.getMaxValue())) {
+ throw `tried to assign value of ${value}, which exceeds max value of ${this.getMaxValue()}`;
+ } else if (value.lessThan(this.getMinValue())) {
+ throw `tried to assign value of ${value}, which exceeds min value of ${this.getMinValue()}`;
+ }
+
+ const hexBase = 16;
+ const evmWordWidth = 32;
+ let valueBuf: Buffer;
+ if (value.greaterThanOrEqualTo(0)) {
+ valueBuf = ethUtil.setLengthLeft(ethUtil.toBuffer(`0x${value.toString(hexBase)}`), evmWordWidth);
+ } else {
+ // BigNumber can't write a negative hex value, so we use twos-complement conversion to do it ourselves.
+ // Step 1/3: Convert value to positive binary string
+ const binBase = 2;
+ const valueBin = value.times(-1).toString(binBase);
+
+ // Step 2/3: Invert binary value
+ const bitsInEvmWord = 256;
+ let invertedValueBin = '1'.repeat(bitsInEvmWord - valueBin.length);
+ _.each(valueBin, (bit: string) => {
+ invertedValueBin += bit === '1' ? '0' : '1';
+ });
+ const invertedValue = new BigNumber(invertedValueBin, binBase);
+
+ // Step 3/3: Add 1 to inverted value
+ // The result is the two's-complement represent of the input value.
+ const negativeValue = invertedValue.plus(1);
+
+ // Convert the negated value to a hex string
+ valueBuf = ethUtil.setLengthLeft(
+ ethUtil.toBuffer(`0x${negativeValue.toString(hexBase)}`),
+ evmWordWidth,
+ );
+ }
+
+ return valueBuf;
+ }
+
+ public abstract getMaxValue(): BigNumber;
+ public abstract getMinValue(): BigNumber;
+}
+
+export class Int extends Number {
+ static matcher = RegExp(
+ '^int(8|16|24|32|40|48|56|64|72|88|96|104|112|120|128|136|144|152|160|168|176|184|192|200|208|216|224|232|240|248|256){0,1}$',
+ );
+
+ constructor(dataItem: DataItem) {
+ super(dataItem, Int.matcher);
+ }
+
+ public getMaxValue(): BigNumber {
+ return new BigNumber(2).toPower(this.width - 1).sub(1);
+ }
+
+ public getMinValue(): BigNumber {
+ return new BigNumber(2).toPower(this.width - 1).times(-1);
+ }
+
+ public getSignature(): string {
+ return `int${this.width}`;
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return this.matcher.test(type);
+ }
+}
+
+export class UInt extends Number {
+ static matcher = RegExp(
+ '^uint(8|16|24|32|40|48|56|64|72|88|96|104|112|120|128|136|144|152|160|168|176|184|192|200|208|216|224|232|240|248|256){0,1}$',
+ );
+
+ constructor(dataItem: DataItem) {
+ super(dataItem, UInt.matcher);
+ }
+
+ public getMaxValue(): BigNumber {
+ return new BigNumber(2).toPower(this.width).sub(1);
+ }
+
+ public getMinValue(): BigNumber {
+ return new BigNumber(0);
+ }
+
+ public getSignature(): string {
+ return `uint${this.width}`;
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return this.matcher.test(type);
+ }
+}
+
+export class Byte extends PayloadDataType {
+ private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+ static matcher = RegExp(
+ '^(byte|bytes(1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31|32))$',
+ );
+
+ static DEFAULT_WIDTH = 1;
+ width: number = Byte.DEFAULT_WIDTH;
+
+ constructor(dataItem: DataItem) {
+ super(dataItem, Byte.SIZE_KNOWN_AT_COMPILE_TIME);
+ const matches = Byte.matcher.exec(dataItem.type);
+ if (!Byte.matchGrammar(dataItem.type)) {
+ throw new Error(`Tried to instantiate Byte with bad input: ${dataItem}`);
+ }
+ if (matches !== null && matches.length === 3 && matches[2] !== undefined) {
+ this.width = parseInt(matches[2]);
+ } else {
+ this.width = Byte.DEFAULT_WIDTH;
+ }
+ }
+
+ public getSignature(): string {
+ // Note that `byte` reduces to `bytes1`
+ return `bytes${this.width}`;
+ }
+
+ public static encodeValue(value: string | Buffer): Buffer {
+ // Convert value into a buffer and do bounds checking
+ const valueBuf = ethUtil.toBuffer(value);
+ if (valueBuf.byteLength > this.width) {
+ throw new Error(
+ `Tried to assign ${value} (${
+ valueBuf.byteLength
+ } bytes), which exceeds max bytes that can be stored in a ${this.getSignature()}`,
+ );
+ } else if (value.length % 2 !== 0) {
+ throw new Error(`Tried to assign ${value}, which is contains a half-byte. Use full bytes only.`);
+ }
+
+ // Store value as hex
+ const evmWordWidth = 32;
+ const paddedValue = ethUtil.setLengthRight(valueBuf, evmWordWidth);
+ return paddedValue;
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return this.matcher.test(type);
+ }
+}
+
+export class Bytes extends PayloadDataType {
+ private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = false;
+ static UNDEFINED_LENGTH = new BigNumber(-1);
+ length: BigNumber = Bytes.UNDEFINED_LENGTH;
+
+ constructor(dataItem: DataItem) {
+ super(dataItem, Bytes.SIZE_KNOWN_AT_COMPILE_TIME);
+ if (!Bytes.matchGrammar(dataItem.type)) {
+ throw new Error(`Tried to instantiate Bytes with bad input: ${dataItem}`);
+ }
+ }
+
+ public encodeValue(value: string | Buffer): Buffer {
+ if (typeof value === 'string' && !value.startsWith('0x')) {
+ throw new Error(`Input value must be hex (prefixed with 0x). Actual value is '${value}'`);
+ }
+ const valueBuf = ethUtil.toBuffer(value);
+ if (value.length % 2 !== 0) {
+ throw new Error(`Tried to assign ${value}, which is contains a half-byte. Use full bytes only.`);
+ }
+
+ const wordsForValue = Math.ceil(valueBuf.byteLength / 32);
+ const paddedBytesForValue = wordsForValue * 32;
+ const paddedValueBuf = ethUtil.setLengthRight(valueBuf, paddedBytesForValue);
+ const paddedLengthBuf = ethUtil.setLengthLeft(ethUtil.toBuffer(valueBuf.byteLength), 32);
+ const encodedValueBuf = Buffer.concat([paddedLengthBuf, paddedValueBuf]);
+ return encodedValueBuf;
+ }
+
+ public getSignature(): string {
+ return 'bytes';
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return type === 'bytes';
+ }
+}
+
+export class SolString extends PayloadDataType {
+ private static SIZE_KNOWN_AT_COMPILE_TIME: boolean = false;
+ constructor(dataItem: DataItem) {
+ super(dataItem, SolString.SIZE_KNOWN_AT_COMPILE_TIME);
+ if (!SolString.matchGrammar(dataItem.type)) {
+ throw new Error(`Tried to instantiate String with bad input: ${dataItem}`);
+ }
+ }
+
+ public static encodeValue(value: string): Buffer {
+ const wordsForValue = Math.ceil(value.length / 32);
+ const paddedBytesForValue = wordsForValue * 32;
+ const valueBuf = ethUtil.setLengthRight(ethUtil.toBuffer(value), paddedBytesForValue);
+ const lengthBuf = ethUtil.setLengthLeft(ethUtil.toBuffer(value.length), 32);
+ const encodedValueBuf = Buffer.concat([lengthBuf, valueBuf]);
+ return encodedValueBuf;
+ }
+
+ public getSignature(): string {
+ return 'string';
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return type === 'string';
+ }
+}
+
+export class Pointer extends DependentDataType {
+
+ constructor(destDataType: DataType, parentDataType: DataType) {
+ const destDataItem = destDataType.getDataItem();
+ const dataItem = { name: `ptr<${destDataItem.name}>`, type: `ptr<${destDataItem.type}>` } as DataItem;
+ super(dataItem, destDataType, parentDataType);
+ }
+
+ public getSignature(): string {
+ return this.dependency.getSignature();
+ }
+}
+
+export class Tuple extends MemberDataType {
+ private tupleSignature: string;
+
+ constructor(dataItem: DataItem) {
+ super(dataItem);
+ if (!Tuple.matchGrammar(dataItem.type)) {
+ throw new Error(`Tried to instantiate Tuple with bad input: ${dataItem}`);
+ }
+ this.tupleSignature = this.computeSignatureOfMembers();
+ }
+
+ public getSignature(): string {
+ return this.tupleSignature;
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return type === 'tuple';
+ }
+}
+
+export class SolArray extends MemberDataType {
+ static matcher = RegExp('^(.+)\\[([0-9]*)\\]$');
+ private arraySignature: string;
+ private elementType: string;
+
+ constructor(dataItem: DataItem) {
+ // Sanity check
+ const matches = SolArray.matcher.exec(dataItem.type);
+ if (matches === null || matches.length !== 3) {
+ throw new Error(`Could not parse array: ${dataItem.type}`);
+ } else if (matches[1] === undefined) {
+ throw new Error(`Could not parse array type: ${dataItem.type}`);
+ } else if (matches[2] === undefined) {
+ throw new Error(`Could not parse array length: ${dataItem.type}`);
+ }
+
+ const isArray = true;
+ const arrayLength = (matches[2] === '') ? undefined : parseInt(matches[2], 10);
+ super(dataItem, isArray, arrayLength);
+ this.elementType = matches[1];
+ this.arraySignature = this.computeSignature();
+ }
+
+ private computeSignature(): string {
+ let dataItem = {
+ type: this.elementType,
+ name: 'N/A',
+ } as DataItem;
+ const components = this.getDataItem().components;
+ if (components !== undefined) {
+ dataItem.components = components;
+ }
+ const elementDataType = DataTypeFactory.mapDataItemToDataType(dataItem);
+ const type = elementDataType.getSignature();
+ if (this.arrayLength === undefined) {
+ return `${type}[]`;
+ } else {
+ return `${type}[${this.arrayLength}]`;
+ }
+ }
+
+ public getSignature(): string {
+ return this.arraySignature;
+ }
+
+ public static matchGrammar(type: string): boolean {
+ return this.matcher.test(type);
+ }
+}
+
+export class Method extends MemberDataType {
+ private methodSignature: string;
+ private methodSelector: string;
+
+ constructor(abi: MethodAbi) {
+ super({ type: 'method', name: abi.name });
+ this.methodSignature = this.computeSignature();
+ this.methodSelector = this.computeSelector();
+ }
+
+ private computeSignature(): string {
+ const memberSignature = this.computeSignatureOfMembers();
+ const methodSignature = `${this.getDataItem().name}${memberSignature}`;
+ return methodSignature;
+ }
+
+ private computeSelector(): string {
+ const signature = this.computeSignature();
+ const selector = ethUtil.bufferToHex(ethUtil.toBuffer(ethUtil.sha3(signature).slice(0, 4)));
+ return selector;
+ }
+
+ public getSignature(): string {
+ return this.methodSignature;
+ }
+
+ public getSelector(): string {
+ return this.methodSelector;
+ }
+}
+
+export class EvmDataTypeFactoryImpl implements DataTypeFactoryImpl {
+
+ public mapDataItemToDataType(dataItem: DataItem): DataType {
+ console.log(`Type: ${dataItem.type}`);
+
+ if (SolArray.matchGrammar(dataItem.type)) return new SolArray(dataItem);
+ if (Address.matchGrammar(dataItem.type)) return new Address(dataItem);
+ if (Bool.matchGrammar(dataItem.type)) return new Bool(dataItem);
+ if (Int.matchGrammar(dataItem.type)) return new Int(dataItem);
+ if (UInt.matchGrammar(dataItem.type)) return new UInt(dataItem);
+ if (Byte.matchGrammar(dataItem.type)) return new Byte(dataItem);
+ if (Tuple.matchGrammar(dataItem.type)) return new Tuple(dataItem);
+ if (Bytes.matchGrammar(dataItem.type)) return new Bytes(dataItem);
+ if (SolString.matchGrammar(dataItem.type)) return new SolString(dataItem);
+ //if (Fixed.matchGrammar(dataItem.type)) return Fixed(dataItem);
+ //if (UFixed.matchGrammar(dataItem.type)) return UFixed(dataItem);
+
+ throw new Error(`Unrecognized data type: '${dataItem.type}'`);
+ }
+
+ public create(dataItem: DataItem, parentDataType: DataType): DataType {
+ const dataType = this.mapDataItemToDataType(dataItem);
+ if (dataType.isStatic()) {
+ return dataType;
+ }
+
+ const pointer = new Pointer(dataType, parentDataType);
+ return pointer;
+ }
+} \ No newline at end of file