swift的异常处理：本质是错误信息的传递方式
Posted feng9exe
tags:
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func response(from resultObject: Any) throws -> Response {
guard
let dict = resultObject as? [String: AnyObject],
let transaction = PendingTransaction.from(dict)
else {
throw CastError(actualValue: resultObject, expectedType: Response.self)
}
return transaction
}
func convertPrivateKeyToKeystoreFile(privateKey: String, passphrase: String) -> Result<[String: Any], KeystoreError> {
guard let data = Data(hexString: privateKey) else {
return .failure(KeystoreError.failedToImportPrivateKey)
}
do {
let key = try KeystoreKey(password: passphrase, key: data)
let data = try JSONEncoder().encode(key)
let dict = try JSONSerialization.jsonObject(with: data, options: []) as! [String: Any]
return .success(dict)
} catch {
return .failure(KeystoreError.failedToImportPrivateKey)
}
}
var asDictionary: [String: Any]? {
if let data = self.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
return [:]
}
}
return [:]
}
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