Errors (Swift)

VoltaireError and error handling

Errors

Swift wrappers throw VoltaireError when C calls return non-zero error codes.

VoltaireError

public enum VoltaireError: Error, Equatable {
    case invalidHex
    case invalidLength
    case invalidChecksum
    case outOfMemory
    case invalidInput
    case invalidSignature
    case invalidSelector
    case unsupportedType
    case maxLengthExceeded
    case invalidAccessList
    case invalidAuthorization
    case unknown(Int32)
}

Handling Errors

do {
  let v = try U256(hex: "0xz")
} catch let e as VoltaireError {
  switch e {
  case .invalidHex: print("Bad hex")
  default: print("Other error: \(e)")
  }
}