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-rw-r--r--packages/utils/CHANGELOG.md4
-rw-r--r--packages/utils/package.json4
-rw-r--r--packages/utils/src/abi_decoder.ts27
-rw-r--r--packages/utils/src/globals.d.ts3
-rw-r--r--packages/utils/tsconfig.json6
5 files changed, 26 insertions, 18 deletions
diff --git a/packages/utils/CHANGELOG.md b/packages/utils/CHANGELOG.md
index 19ee80e4f..81792bee8 100644
--- a/packages/utils/CHANGELOG.md
+++ b/packages/utils/CHANGELOG.md
@@ -1,5 +1,9 @@
# CHANGELOG
+## v0.4.0 - _TBD, 2018_
+
+ * Use `ethers-contracts` as a backend to decode event args (#413)
+
## v0.3.2 - _February 9, 2018_
* Fix publishing issue where .npmignore was not properly excluding undesired content (#389)
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 750ecaa2f..4f63aa4ce 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -21,16 +21,18 @@
"homepage": "https://github.com/0xProject/0x.js/packages/utils/README.md",
"devDependencies": {
"@0xproject/tslint-config": "^0.4.9",
- "@0xproject/types": "^0.2.3",
"@types/lodash": "^4.14.86",
"npm-run-all": "^4.1.2",
"shx": "^0.2.2",
"tslint": "5.8.0",
"typescript": "2.7.1",
+ "ethers-typescript-typings": "^0.0.1",
"web3-typescript-typings": "^0.9.11"
},
"dependencies": {
+ "@0xproject/types": "^0.2.3",
"bignumber.js": "~4.1.0",
+ "ethers-contracts": "^2.2.1",
"js-sha3": "^0.7.0",
"lodash": "^4.17.4",
"web3": "^0.20.0"
diff --git a/packages/utils/src/abi_decoder.ts b/packages/utils/src/abi_decoder.ts
index 368973b1b..2b496eb17 100644
--- a/packages/utils/src/abi_decoder.ts
+++ b/packages/utils/src/abi_decoder.ts
@@ -1,7 +1,7 @@
import { AbiType, DecodedLogArgs, LogWithDecodedArgs, RawLog, SolidityTypes } from '@0xproject/types';
+import * as ethersContracts from 'ethers-contracts';
import * as _ from 'lodash';
import * as Web3 from 'web3';
-import * as SolidityCoder from 'web3/lib/solidity/coder';
import { BigNumber } from './configured_bignumber';
@@ -27,31 +27,29 @@ export class AbiDecoder {
if (_.isUndefined(event)) {
return log;
}
+ const ethersInterface = new ethersContracts.Interface([event]);
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));
+ const decodedData = ethersInterface.events[event.name].parse(log.data);
let failedToDecode = false;
- _.forEach(event.inputs, (param: Web3.EventParameter) => {
+ _.forEach(event.inputs, (param: Web3.EventParameter, i: number) => {
// Indexed parameters are stored in topics. Non-indexed ones in decodedData
- let value: BigNumber | string = param.indexed ? log.topics[topicsIndex++] : decodedData[dataIndex++];
+ let value: BigNumber | string | number = param.indexed ? log.topics[topicsIndex++] : decodedData[i];
if (_.isUndefined(value)) {
failedToDecode = true;
return;
}
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
- ) {
+ } else if (param.type === SolidityTypes.Uint256 || param.type === SolidityTypes.Uint) {
value = new BigNumber(value);
+ } else if (param.type === SolidityTypes.Uint8) {
+ value = new BigNumber(value).toNumber();
}
decodedParams[param.name] = value;
});
@@ -67,11 +65,14 @@ export class AbiDecoder {
}
}
private _addABI(abiArray: Web3.AbiDefinition[]): void {
+ if (_.isUndefined(abiArray)) {
+ return;
+ }
+ const ethersInterface = new ethersContracts.Interface(abiArray);
_.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;
+ const topic = ethersInterface.events[abi.name].topic;
+ this._methodIds[topic] = abi;
}
});
this._savedABIs = this._savedABIs.concat(abiArray);
diff --git a/packages/utils/src/globals.d.ts b/packages/utils/src/globals.d.ts
deleted file mode 100644
index ade9e59db..000000000
--- a/packages/utils/src/globals.d.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-declare module 'web3/lib/solidity/coder' {
- const decodeParams: (types: string[], data: string) => any[];
-}
diff --git a/packages/utils/tsconfig.json b/packages/utils/tsconfig.json
index 3d967d05f..8114d99cd 100644
--- a/packages/utils/tsconfig.json
+++ b/packages/utils/tsconfig.json
@@ -3,5 +3,9 @@
"compilerOptions": {
"outDir": "lib"
},
- "include": ["./src/**/*", "../../node_modules/web3-typescript-typings/index.d.ts"]
+ "include": [
+ "./src/**/*",
+ "../../node_modules/web3-typescript-typings/index.d.ts",
+ "../../node_modules/ethers-typescript-typings/index.d.ts"
+ ]
}