76 lines
1.3 KiB
TypeScript
76 lines
1.3 KiB
TypeScript
import BN from 'bn.js';
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import { toChecksumAddress } from 'ethereumjs-util';
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import Contract, { ABI } from 'libs/contract';
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interface Transfer {
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to: string;
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value: BN;
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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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public balanceOf(address: string): string {
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return this.call('balanceOf', [address]);
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}
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public transfer(to: string, value: BN): string {
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return this.call('transfer', [to, value.toString()]);
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}
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public $transfer(data: string): Transfer {
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const decodedArgs = this.decodeArgs(this.getMethodAbi('transfer'), data);
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return {
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to: toChecksumAddress(`0x${decodedArgs[0].toString(16)}`),
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value: decodedArgs[1]
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};
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}
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}
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export default new ERC20();
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