iOS区块链钱包之web3swift（四）

ETH（ropsten）测试币领取地址：http://faucet.ropsten.be:3001/

ETH（ropsten）测试区块查询地址：https://ropsten.etherscan.io/

ETH(Rinkeby)测试币领取地址：https://faucet.rinkeby.io/

ETH（Rinkeby）测试区块查询地址：https://rinkeby.etherscan.io

1. 生成助记词

let mmemonics = BIP39.generateMnemonics(bitsOfEntropy: 128)

2. 转换成种子

// 助记词转换为随机种子
let seed = BIP39.seedFromMmemonics(mnemonic)

3. 创建账号

let keystore = try! BIP32Keystore(seed: seed!, password: "123456")
kLog(keystore?.addresses?.first?.address)

let keystoreManager = KeystoreManager([keystore!])

let account = keystoreManager.addresses![0]

kLog(account)

let privateKey = try! keystore?.UNSAFE_getPrivateKeyData(password: "123456", account: account)
kLog(privateKey?.hex)

4. 网络配置

// 申请测试链 https://infura.io/
let url = URL(string: "https://rinkeby.infura.io/v3/xxxxxxxxxxxxxxxxxxx")
let web3 = Web3.new(url!)
web3?.provider.network = nil
web3?.addKeystoreManager(keystoreManager)

5. 获取余额

// 3. 查询余额
let balanceResult = web3?.eth.getBalance(address: account)
guard case .success(let balance)? = balanceResult else {return}
kLog(Web3.Utils.formatToEthereumUnits(balance) ?? "")

6. 转账

let sendToAddress = EthereumAddress("0x000000000000000000000000")
let contract = web3?.contract(Web3.Utils.coldWalletABI, at: sendToAddress, abiVersion: 2)

let amount = "0.0001"
var options = Web3Options.defaultOptions()
options.value = Web3.Utils.parseToBigUInt(amount, units: .eth)
options.from = account

let intermediate = contract?.method("fallback", options: options)
guard let result = intermediate?.send(password: "123456") else {return print("result error")}
switch result {
case .success(let res):
    print(res)
    return
case .failure(let error):
    print(error)
}

7. 绘制收款二维码

var eip67Data = Web3.EIP67Code(address: account)
eip67Data.gasLimit = BigUInt(21000)
eip67Data.amount = BigUInt("1000000000000000000")
let encoding = eip67Data.toImage(scale: 10.0)
//self.imageView.image = UIImage(ciImage: encoding)
//self.imageView.contentMode = .scaleAspectFit

好了，记录到此结束，更多知识请期待后续的整理，另外IMtoken开源了，近期我会整理一份源码解析，当然你们有好的建议或者问题也可以在下方留言，我会一一解答的。