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Getting Started (Swift)

Use Voltaire’s Swift wrappers to access Ethereum primitives from iOS and macOS.

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Prerequisites

  • macOS 12+ / iOS 15+
  • Swift 5.9+
  • Zig 0.15+ (builds the native library)

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Build

From the repository root: 
zig build build-ts-native
cd swift
swift build
swift test

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Add to Your App

Use the swift directory as a SwiftPM package in Xcode or add as a local dependency. 
// Package.swift (example)
dependencies: [
  .package(path: "../voltaire/swift")
],
targets: [
  .target(name: "YourApp", dependencies: [
    .product(name: "Voltaire", package: "swift")
  ])
]

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Usage

import Voltaire

// Address
let addr = try Address(hex: "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045")
print(addr.checksumHex)

// Keccak-256
let h = Keccak256.hash("hello world")
print(h.hex)

// U256
let v = try U256(hex: "0x01")
print(v.hex) // 0x00..01

// Signature parsing and normalization
let r = [UInt8](repeating: 0, count: 31) + [0x01]
let s = [UInt8](repeating: 0, count: 31) + [0x02]
let sig = try Signature(compact: r + s)
print(sig.isCanonical)
let compact = sig.normalized().serialize(includeV: false)