Pustaka API JavaScript

1// A BrowserProvider wraps a standard Web3 provider, which is // BrowserProvider membungkus penyedia Web3 standar, yaitu
2// what MetaMask injects as window.ethereum into each page // apa yang disuntikkan MetaMask sebagai window.ethereum ke setiap halaman
3const provider = new ethers.BrowserProvider(window.ethereum)
4
5// The MetaMask plugin also allows signing transactions to // Plugin MetaMask juga memungkinkan penandatanganan transaksi untuk
6// send ether and pay to change state within the blockchain. // mengirim ether dan membayar untuk mengubah status di dalam blockchain.
7// For this, we need the account signer... // Untuk ini, kita memerlukan penandatangan akun...
8const signer = provider.getSigner()
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1var web3 = new Web3("http://localhost:8545")
2// or // atau
3var web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"))
4
5// change provider // ubah penyedia
6web3.setProvider("ws://localhost:8546")
7// or // atau
8web3.setProvider(new Web3.providers.WebsocketProvider("ws://localhost:8546"))
9
10// Using the IPC provider in node.js // Menggunakan penyedia IPC di node.js
11var net = require("net")
12var web3 = new Web3("/Users/myuser/Library/Ethereum/geth.ipc", net) // mac os path // jalur mac os
13// or // atau
14var web3 = new Web3(
15  new Web3.providers.IpcProvider("/Users/myuser/Library/Ethereum/geth.ipc", net)
16) // mac os path // jalur mac os
17// on windows the path is: "\\\\.\\pipe\\geth.ipc" // di windows jalurnya adalah: "\\\\.\\pipe\\geth.ipc"
18// on linux the path is: "/users/myuser/.ethereum/geth.ipc" // di linux jalurnya adalah: "/users/myuser/.ethereum/geth.ipc"
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1// Create a wallet instance from a mnemonic... // Buat instans dompet dari mnemonik...
2mnemonic =
3  "announce room limb pattern dry unit scale effort smooth jazz weasel alcohol"
4walletMnemonic = Wallet.fromPhrase(mnemonic)
5
6// ...or from a private key // ...atau dari kunci privat
7walletPrivateKey = new Wallet(walletMnemonic.privateKey)
8
9walletMnemonic.address === walletPrivateKey.address
10// true // true
11
12// The address as a Promise per the Signer API // Alamat sebagai Promise sesuai dengan API Signer
13walletMnemonic.getAddress()
14// { Promise: '0x71CB05EE1b1F506fF321Da3dac38f25c0c9ce6E1' } // { Promise: '0x71CB05EE1b1F506fF321Da3dac38f25c0c9ce6E1' }
15
16// A Wallet address is also available synchronously // Alamat dompet juga tersedia secara sinkron
17walletMnemonic.address
18// '0x71CB05EE1b1F506fF321Da3dac38f25c0c9ce6E1' // '0x71CB05EE1b1F506fF321Da3dac38f25c0c9ce6E1'
19
20// The internal cryptographic components // Komponen kriptografi internal
21walletMnemonic.privateKey
22// '0x1da6847600b0ee25e9ad9a52abbd786dd2502fa4005dd5af9310b7cc7a3b25db' // '0x1da6847600b0ee25e9ad9a52abbd786dd2502fa4005dd5af9310b7cc7a3b25db'
23walletMnemonic.publicKey
24// '0x04b9e72dfd423bcf95b3801ac93f4392be5ff22143f9980eb78b3a860c4843bfd04829ae61cdba4b3b1978ac5fc64f5cc2f4350e35a108a9c9a92a81200a60cd64' // '0x04b9e72dfd423bcf95b3801ac93f4392be5ff22143f9980eb78b3a860c4843bfd04829ae61cdba4b3b1978ac5fc64f5cc2f4350e35a108a9c9a92a81200a60cd64'
25
26// The wallet mnemonic // Mnemonik dompet
27walletMnemonic.mnemonic
28// { // {
29//   locale: 'en', // locale: 'en',
30//   path: 'm/44\'/60\'/0\'/0/0', // path: 'm/44\'/60\'/0\'/0/0',
31//   phrase: 'announce room limb pattern dry unit scale effort smooth jazz weasel alcohol' // phrase: 'announce room limb pattern dry unit scale effort smooth jazz weasel alcohol'
32// } // }
33
34// Note: A wallet created with a private key does not // Catatan: Sebuah dompet yang dibuat dengan kunci privat tidak
35//       have a mnemonic (the derivation prevents it) // memiliki mnemonik (derivasi mencegahnya)
36walletPrivateKey.mnemonic
37// null // null
38
39// Signing a message // Menandatangani pesan
40walletMnemonic.signMessage("Hello World")
41// { Promise: '0x14280e5885a19f60e536de50097e96e3738c7acae4e9e62d67272d794b8127d31c03d9cd59781d4ee31fb4e1b893bd9b020ec67dfa65cfb51e2bdadbb1de26d91c' } // { Promise: '0x14280e5885a19f60e536de50097e96e3738c7acae4e9e62d67272d794b8127d31c03d9cd59781d4ee31fb4e1b893bd9b020ec67dfa65cfb51e2bdadbb1de26d91c' }
42
43tx = {
44  to: "0x8ba1f109551bD432803012645Ac136ddd64DBA72",
45  value: utils.parseEther("1.0"),
46}
47
48// Signing a transaction // Menandatangani transaksi
49walletMnemonic.signTransaction(tx)
50// { Promise: '0xf865808080948ba1f109551bd432803012645ac136ddd64dba72880de0b6b3a7640000801ca0918e294306d177ab7bd664f5e141436563854ebe0a3e523b9690b4922bbb52b8a01181612cec9c431c4257a79b8c9f0c980a2c49bb5a0e6ac52949163eeb565dfc' } // { Promise: '0xf865808080948ba1f109551bd432803012645ac136ddd64dba72880de0b6b3a7640000801ca0918e294306d177ab7bd664f5e141436563854ebe0a3e523b9690b4922bbb52b8a01181612cec9c431c4257a79b8c9f0c980a2c49bb5a0e6ac52949163eeb565dfc' }
51
52// The connect method returns a new instance of the // Metode connect mengembalikan instans baru dari
53// Wallet connected to a provider // Dompet yang terhubung ke penyedia
54wallet = walletMnemonic.connect(provider)
55
56// Querying the network // Melakukan kueri jaringan
57wallet.getBalance()
58// { Promise: { BigNumber: "42" } } // { Promise: { BigNumber: "42" } }
59wallet.getTransactionCount()
60// { Promise: 0 } // { Promise: 0 }
61
62// Sending ether // Mengirim ether
63wallet.sendTransaction(tx)
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1contract Test {
2    uint a;
3    address d = 0x12345678901234567890123456789012;
4
5    constructor(uint testInt)  { a = testInt;}
6
7    event Event(uint indexed b, bytes32 c);
8
9    event Event2(uint indexed b, bytes32 c);
10
11    function foo(uint b, bytes32 c) returns(address) {
12        Event(b, c);
13        return d;
14    }
15}
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1[{
2    "type":"constructor",
3    "payable":false,
4    "stateMutability":"nonpayable"
5    "inputs":[{"name":"testInt","type":"uint256"}],
6  },{
7    "type":"function",
8    "name":"foo",
9    "constant":false,
10    "payable":false,
11    "stateMutability":"nonpayable",
12    "inputs":[{"name":"b","type":"uint256"}, {"name":"c","type":"bytes32"}],
13    "outputs":[{"name":"","type":"address"}]
14  },{
15    "type":"event",
16    "name":"Event",
17    "inputs":[{"indexed":true,"name":"b","type":"uint256"}, {"indexed":false,"name":"c","type":"bytes32"}],
18    "anonymous":false
19  },{
20    "type":"event",
21    "name":"Event2",
22    "inputs":[{"indexed":true,"name":"b","type":"uint256"},{"indexed":false,"name":"c","type":"bytes32"}],
23    "anonymous":false
24}]
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1// Get the balance of an account (by address or ENS name) // Dapatkan saldo akun (berdasarkan alamat atau nama ENS)
2balance = await provider.getBalance("ethers.eth")
3// { BigNumber: "2337132817842795605" } // { BigNumber: "2337132817842795605" }
4
5// Often you will need to format the output for the user // Seringkali Anda perlu memformat output untuk pengguna
6// which prefer to see values in ether (instead of wei) // yang lebih suka melihat nilai dalam ether (bukan wei)
7ethers.utils.formatEther(balance)
8// '2.337132817842795605' // '2.337132817842795605'
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