🚀 Developed / Developing by Cosmostation
Cosmostation wallet apps are non-custodial tendermint-based wallet that supports Cosmos Network. We will add more tendermint-based blockchain projects in the coming updates, such as IRISnet, IOV, Kava.
for generate signature with swift you have to midify BicoinKey library after pod intalled. please check below code for get correct signature in tendermint /Pods/BitcoinKet/Source/Crypro.swift (line ~59)
public static func sign(_ data: Data, privateKey: PrivateKey) throws -> Data {
let ctx = secp256k1_context_create(UInt32(SECP256K1_CONTEXT_SIGN))!
defer { secp256k1_context_destroy(ctx) }
let signature = UnsafeMutablePointer<secp256k1_ecdsa_signature>.allocate(capacity: 1)
defer { signature.deallocate() }
var paddingKey = Data()
let value: UInt8 = 0
for i in privateKey.raw.count..<32 {
paddingKey.append(value)
}
paddingKey.append(privateKey.raw)
let status = data.withUnsafeBytes { (ptr: UnsafePointer<UInt8>) in
paddingKey.withUnsafeBytes { secp256k1_ecdsa_sign(ctx, signature, ptr, $0, nil, nil) }
}
guard status == 1 else { throw CryptoError.signFailed }
let normalizedsig = UnsafeMutablePointer<secp256k1_ecdsa_signature>.allocate(capacity: 1)
defer { normalizedsig.deallocate() }
secp256k1_ecdsa_signature_normalize(ctx, normalizedsig, signature)
var length: size_t = 128
var der = Data(count: length)
guard der.withUnsafeMutableBytes({ return secp256k1_ecdsa_signature_serialize_der(ctx, $0, &length, normalizedsig) }) == 1 else { throw CryptoError.noEnoughSpace }
der.count = length
return der
}Copyright © Cosmostation, Inc. All rights reserved.
Licensed under the MIT.