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Merge pull request #59 from cosmology-tech/ethersjs
Ethersjs
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| 1. use ganache js to run a ethereum node locally | ||
| ``` | ||
| npx ganache \ | ||
| --account="0x0000000000000000000000000000000000000000000000000000000000000001,1000000000000000000" \ | ||
| --account="0x0000000000000000000000000000000000000000000000000000000000000002,1000000000000000000" | ||
| ``` | ||
| 2. run test： | ||
| ``` | ||
| npx jest --preset ts-jest ganache/__tests__/send.test.ts | ||
| ``` |
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| import { ethers } from 'ethers'; | ||
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| describe('ETH Transfer Test', () => { | ||
| let provider: ethers.JsonRpcProvider; | ||
| let wallet0: ethers.Wallet; | ||
| let wallet1: ethers.Wallet; | ||
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| const privateKey0 = '0x0000000000000000000000000000000000000000000000000000000000000001'; | ||
| const privateKey1 = '0x0000000000000000000000000000000000000000000000000000000000000002'; | ||
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| beforeAll(async () => { | ||
| provider = new ethers.JsonRpcProvider('http://127.0.0.1:8545'); | ||
| // provider = new ethers.BrowserProvider(window.ethereum) // if in browser | ||
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| wallet0 = new ethers.Wallet(privateKey0, provider); | ||
| // wallet0 = await provider.getSigner() // if in browser. like the offline signer in keplr cosmos | ||
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| wallet1 = new ethers.Wallet(privateKey1, provider); // only used to receive token | ||
| }); | ||
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| it('should transfer ETH from wallet0 to wallet1 and check balances', async () => { | ||
| const initialBalance0 = await provider.getBalance(wallet0.address); | ||
| const initialBalance1 = await provider.getBalance(wallet1.address); | ||
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| const amountToSend = ethers.parseEther('0.01'); | ||
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| const tx = await wallet0.sendTransaction({ | ||
| to: wallet1.address, | ||
| value: amountToSend, | ||
| }); | ||
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| await tx.wait(); | ||
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| const finalBalance0 = await provider.getBalance(wallet0.address); | ||
| const finalBalance1 = await provider.getBalance(wallet1.address); | ||
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| expect(finalBalance0).toBeLessThan(initialBalance0); | ||
| expect(finalBalance1).toBeGreaterThan(initialBalance1); | ||
| expect(finalBalance1).toEqual(initialBalance1 + amountToSend); | ||
| }); | ||
| }); |
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