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-rw-r--r--packages/utils/src/abi_decoder.ts70
-rw-r--r--packages/utils/src/globals.d.ts3
-rw-r--r--packages/utils/src/index.ts1
-rw-r--r--packages/utils/src/transaction_utils.ts52
-rw-r--r--packages/utils/src/types.ts3
5 files changed, 129 insertions, 0 deletions
diff --git a/packages/utils/src/abi_decoder.ts b/packages/utils/src/abi_decoder.ts
new file mode 100644
index 000000000..574902de6
--- /dev/null
+++ b/packages/utils/src/abi_decoder.ts
@@ -0,0 +1,70 @@
+import { AbiType, DecodedLogArgs, LogWithDecodedArgs, RawLog, SolidityTypes } from '@0xproject/types';
+import * as _ from 'lodash';
+import * as Web3 from 'web3';
+import * as SolidityCoder from 'web3/lib/solidity/coder';
+
+import { BigNumber } from './configured_bignumber';
+
+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${formatted}`;
+ }
+ constructor(abiArrays: Web3.AbiDefinition[][]) {
+ _.map(abiArrays, this._addABI.bind(this));
+ }
+ // This method can only decode logs from the 0x & ERC20 smart contracts
+ public tryToDecodeLogOrNoop<ArgsType>(log: Web3.LogEntry): LogWithDecodedArgs<ArgsType> | RawLog {
+ const methodId = log.topics[0];
+ const event = this._methodIds[methodId];
+ if (_.isUndefined(event)) {
+ return log;
+ }
+ const logData = log.data;
+ const decodedParams: DecodedLogArgs = {};
+ let dataIndex = 0;
+ let topicsIndex = 1;
+
+ const nonIndexedInputs = _.filter(event.inputs, input => !input.indexed);
+ const dataTypes = _.map(nonIndexedInputs, input => input.type);
+ const decodedData = SolidityCoder.decodeParams(dataTypes, logData.slice('0x'.length));
+
+ _.map(event.inputs, (param: Web3.EventParameter) => {
+ // Indexed parameters are stored in topics. Non-indexed ones in decodedData
+ let value = param.indexed ? log.topics[topicsIndex++] : decodedData[dataIndex++];
+ if (param.type === SolidityTypes.Address) {
+ value = AbiDecoder._padZeros(new BigNumber(value).toString(16));
+ } else if (
+ param.type === SolidityTypes.Uint256 ||
+ param.type === SolidityTypes.Uint8 ||
+ param.type === SolidityTypes.Uint
+ ) {
+ value = new BigNumber(value);
+ }
+ decodedParams[param.name] = value;
+ });
+
+ return {
+ ...log,
+ event: event.name,
+ args: decodedParams,
+ };
+ }
+ private _addABI(abiArray: Web3.AbiDefinition[]): void {
+ _.map(abiArray, (abi: Web3.AbiDefinition) => {
+ if (abi.type === AbiType.Event) {
+ const signature = `${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);
+ }
+}
diff --git a/packages/utils/src/globals.d.ts b/packages/utils/src/globals.d.ts
new file mode 100644
index 000000000..ade9e59db
--- /dev/null
+++ b/packages/utils/src/globals.d.ts
@@ -0,0 +1,3 @@
+declare module 'web3/lib/solidity/coder' {
+ const decodeParams: (types: string[], data: string) => any[];
+}
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index 2768e49ab..39dede41f 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -3,3 +3,4 @@ export { addressUtils } from './address_utils';
export { classUtils } from './class_utils';
export { intervalUtils } from './interval_utils';
export { BigNumber } from './configured_bignumber';
+export { AbiDecoder } from './abi_decoder';
diff --git a/packages/utils/src/transaction_utils.ts b/packages/utils/src/transaction_utils.ts
new file mode 100644
index 000000000..a1db90817
--- /dev/null
+++ b/packages/utils/src/transaction_utils.ts
@@ -0,0 +1,52 @@
+import { AbiDecoder } from '@0xproject/abi-decoder';
+import { TransactionReceiptWithDecodedLogs } from '@0xproject/types';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as _ from 'lodash';
+
+import { intervalUtils } from './interval_utils';
+import { TransactionError } from './types';
+
+export const awaitTransactionMinedAsync = async (
+ web3Wrapper: Web3Wrapper,
+ abiDecoder: AbiDecoder,
+ txHash: string,
+ pollingIntervalMs = 1000,
+ timeoutMs?: number,
+) => {
+ let timeoutExceeded = false;
+ if (timeoutMs) {
+ setTimeout(() => (timeoutExceeded = true), timeoutMs);
+ }
+
+ const txReceiptPromise = new Promise((resolve: (receipt: TransactionReceiptWithDecodedLogs) => void, reject) => {
+ const intervalId = intervalUtils.setAsyncExcludingInterval(
+ async () => {
+ if (timeoutExceeded) {
+ intervalUtils.clearAsyncExcludingInterval(intervalId);
+ return reject(TransactionError.TransactionMiningTimeout);
+ }
+
+ const transactionReceipt = await web3Wrapper.getTransactionReceiptAsync(txHash);
+ if (!_.isNull(transactionReceipt)) {
+ intervalUtils.clearAsyncExcludingInterval(intervalId);
+ const logsWithDecodedArgs = _.map(
+ transactionReceipt.logs,
+ abiDecoder.tryToDecodeLogOrNoop.bind(abiDecoder),
+ );
+ const transactionReceiptWithDecodedLogArgs: TransactionReceiptWithDecodedLogs = {
+ ...transactionReceipt,
+ logs: logsWithDecodedArgs,
+ };
+ resolve(transactionReceiptWithDecodedLogArgs);
+ }
+ },
+ pollingIntervalMs,
+ (err: Error) => {
+ intervalUtils.clearAsyncExcludingInterval(intervalId);
+ reject(err);
+ },
+ );
+ });
+
+ return txReceiptPromise;
+};
diff --git a/packages/utils/src/types.ts b/packages/utils/src/types.ts
new file mode 100644
index 000000000..936256b61
--- /dev/null
+++ b/packages/utils/src/types.ts
@@ -0,0 +1,3 @@
+export enum TransactionError {
+ TransactionMiningTimeout = 'TRANSACTION_MINING_TIMEOUT',
+}