Move utils dir into src

1 files changed, 43 insertions, 0 deletions

diff --git a/packages/contracts/src/utils/multi_sig_wrapper.ts b/packages/contracts/src/utils/multi_sig_wrapper.ts
new file mode 100644
index 000000000..84fed7944
--- /dev/null
+++ b/packages/contracts/src/utils/multi_sig_wrapper.ts
@@ -0,0 +1,43 @@
+import { AbiDefinition, MethodAbi } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+import ABI = require('ethereumjs-abi');
+import ethUtil = require('ethereumjs-util');
+import * as _ from 'lodash';
+import * as Web3 from 'web3';
+
+import { MultiSigWalletContract } from '../contract_wrappers/generated/multi_sig_wallet';
+
+import { TransactionDataParams } from './types';
+
+export class MultiSigWrapper {
+    private _multiSig: MultiSigWalletContract;
+    public static encodeFnArgs(name: string, abi: AbiDefinition[], args: any[]) {
+        const abiEntity = _.find(abi, { name }) as MethodAbi;
+        if (_.isUndefined(abiEntity)) {
+            throw new Error(`Did not find abi entry for name: ${name}`);
+        }
+        const types = _.map(abiEntity.inputs, input => input.type);
+        const funcSig = ethUtil.bufferToHex(ABI.methodID(name, types));
+        const argsData = _.map(args, arg => {
+            const target = _.isBoolean(arg) ? +arg : arg;
+            const targetBuff = ethUtil.toBuffer(target);
+            return ethUtil.setLengthLeft(targetBuff, 32).toString('hex');
+        });
+        return funcSig + argsData.join('');
+    }
+    constructor(multiSigContract: MultiSigWalletContract) {
+        this._multiSig = multiSigContract;
+    }
+    public async submitTransactionAsync(
+        destination: string,
+        from: string,
+        dataParams: TransactionDataParams,
+        value: BigNumber = new BigNumber(0),
+    ) {
+        const { name, abi, args = [] } = dataParams;
+        const encoded = MultiSigWrapper.encodeFnArgs(name, abi, args);
+        return this._multiSig.submitTransaction.sendTransactionAsync(destination, value, encoded, {
+            from,
+        });
+    }
+}