78 lines
1.4 KiB
JavaScript
78 lines
1.4 KiB
JavaScript
// @flow
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import Contract from 'libs/contract';
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import type { ABI } from 'libs/contract';
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import Big from 'bignumber.js';
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import { toChecksumAddress } from 'ethereumjs-util';
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type Transfer = {
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to: string,
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value: string
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};
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const erc20Abi: ABI = [
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{
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constant: true,
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inputs: [
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{
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name: '_owner',
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type: 'address'
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}
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],
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name: 'balanceOf',
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outputs: [
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{
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name: 'balance',
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type: 'uint256'
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}
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],
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payable: false,
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type: 'function'
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},
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{
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constant: false,
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inputs: [
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{
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name: '_to',
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type: 'address'
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},
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{
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name: '_value',
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type: 'uint256'
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}
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],
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name: 'transfer',
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outputs: [
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{
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name: 'success',
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type: 'bool'
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}
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],
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payable: false,
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type: 'function'
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}
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];
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class ERC20 extends Contract {
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constructor() {
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super(erc20Abi);
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}
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balanceOf(address: string): string {
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return this.call('balanceOf', [address]);
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}
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transfer(to: string, value: Big): string {
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return this.call('transfer', [to, value.toString()]);
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}
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$transfer(data: string): Transfer {
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const decodedArgs = this.decodeArgs(this.getMethodAbi('transfer'), data);
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return {
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to: toChecksumAddress(`0x${decodedArgs[0].toString(16)}`),
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value: decodedArgs[1].toString(10)
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};
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}
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}
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export default new ERC20();
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