aboutsummaryrefslogtreecommitdiffstats
path: root/packages/0x.js/src/utils/abi_decoder.ts
diff options
context:
space:
mode:
Diffstat (limited to 'packages/0x.js/src/utils/abi_decoder.ts')
-rw-r--r--packages/0x.js/src/utils/abi_decoder.ts72
1 files changed, 0 insertions, 72 deletions
diff --git a/packages/0x.js/src/utils/abi_decoder.ts b/packages/0x.js/src/utils/abi_decoder.ts
deleted file mode 100644
index bbd2a0b1d..000000000
--- a/packages/0x.js/src/utils/abi_decoder.ts
+++ /dev/null
@@ -1,72 +0,0 @@
-import { BigNumber } from '@0xproject/utils';
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import * as SolidityCoder from 'web3/lib/solidity/coder';
-
-import { AbiType, ContractEventArgs, DecodedLogArgs, LogWithDecodedArgs, RawLog, SolidityTypes } from '../types';
-
-export class AbiDecoder {
- private _savedABIs: Web3.AbiDefinition[] = [];
- private _methodIds: { [signatureHash: string]: Web3.EventAbi } = {};
- private static _padZeros(address: string) {
- let formatted = address;
- if (_.startsWith(formatted, '0x')) {
- formatted = formatted.slice(2);
- }
-
- formatted = _.padStart(formatted, 40, '0');
- return `0x${formatted}`;
- }
- constructor(abiArrays: Web3.AbiDefinition[][]) {
- _.map(abiArrays, this._addABI.bind(this));
- }
- // This method can only decode logs from the 0x & ERC20 smart contracts
- public tryToDecodeLogOrNoop<ArgsType extends ContractEventArgs>(
- log: Web3.LogEntry,
- ): LogWithDecodedArgs<ArgsType> | RawLog {
- const methodId = log.topics[0];
- const event = this._methodIds[methodId];
- if (_.isUndefined(event)) {
- return log;
- }
- const logData = log.data;
- const decodedParams: DecodedLogArgs = {};
- let dataIndex = 0;
- let topicsIndex = 1;
-
- const nonIndexedInputs = _.filter(event.inputs, input => !input.indexed);
- const dataTypes = _.map(nonIndexedInputs, input => input.type);
- const decodedData = SolidityCoder.decodeParams(dataTypes, logData.slice('0x'.length));
-
- _.map(event.inputs, (param: Web3.EventParameter) => {
- // Indexed parameters are stored in topics. Non-indexed ones in decodedData
- let value = param.indexed ? log.topics[topicsIndex++] : decodedData[dataIndex++];
- if (param.type === SolidityTypes.Address) {
- value = AbiDecoder._padZeros(new BigNumber(value).toString(16));
- } else if (
- param.type === SolidityTypes.Uint256 ||
- param.type === SolidityTypes.Uint8 ||
- param.type === SolidityTypes.Uint
- ) {
- value = new BigNumber(value);
- }
- decodedParams[param.name] = value;
- });
-
- return {
- ...log,
- event: event.name,
- args: decodedParams,
- };
- }
- private _addABI(abiArray: Web3.AbiDefinition[]): void {
- _.map(abiArray, (abi: Web3.AbiDefinition) => {
- if (abi.type === AbiType.Event) {
- const signature = `${abi.name}(${_.map(abi.inputs, input => input.type).join(',')})`;
- const signatureHash = new Web3().sha3(signature);
- this._methodIds[signatureHash] = abi;
- }
- });
- this._savedABIs = this._savedABIs.concat(abiArray);
- }
-}