Los desarrolladores de Swift pueden usar varias bibliotecas para el desarrollo en Ethereum, siendo web3.swift la opción más popular para aplicaciones iOS y macOS.
Implementación nativa en Swift para Ethereum.
import Web3
import BigInt
class EthereumClient {
private let web3 = Web3(rpcURL: "YOUR_ETHEREUM_NODE_URL")
func getBalance(address: String) async throws -> Double {
let address = try EthereumAddress(hex: address, eip55: true)
let balance = try await web3.eth.getBalance(address: address)
return balance.converted(to: .ether).value
}
func sendTransaction(
from: EthereumPrivateKey,
to: String,
amount: Double
) async throws -> String {
let toAddress = try EthereumAddress(hex: to, eip55: true)
let amount = EthereumAmount(value: amount, unit: .ether)
let transaction = try await web3.eth.prepareTransaction(
to: toAddress,
value: amount,
from: from.address
)
let signed = try transaction.sign(with: from)
return try await web3.eth.send(transaction: signed)
}
}
Ejemplo moderno de SwiftUI para interacciones con Ethereum:
import SwiftUI
import Web3
struct WalletView: View {
@StateObject private var viewModel = WalletViewModel()
var body: some View {
VStack {
Text("Balance: \(viewModel.balance) ETH")
Button("Refresh") {
Task {
await viewModel.updateBalance()
}
}
}
}
}
class WalletViewModel: ObservableObject {
private let client = EthereumClient()
@Published var balance: Double = 0
func updateBalance() async {
do {
balance = try await client.getBalance(address: "YOUR_ADDRESS")
} catch {
print("Error: \(error)")
}
}
}
Interactúa con contratos inteligentes usando Swift:
struct Contract {
let web3 = Web3(rpcURL: "YOUR_ETHEREUM_NODE_URL")
let contractAddress: EthereumAddress
func callMethod() async throws -> String {
let contract = try await web3.eth.Contract(
json: contractABI,
address: contractAddress
)
return try await contract.method(
"methodName",
parameters: [param1, param2],
extraData: Data()
).call()
}
}
Manejo adecuado de errores en Swift para operaciones Ethereum:
enum EthereumError: Error {
case invalidAddress
case insufficientFunds
case networkError(String)
}
extension EthereumClient {
func safeGetBalance(address: String) async throws -> Double {
guard address.hasPrefix("0x") else {
throw EthereumError.invalidAddress
}
do {
return try await getBalance(address: address)
} catch {
throw EthereumError.networkError(error.localizedDescription)
}
}
}