private const uint hpCLM = 0x434C4D00u; // CLM
public static byte[] Authorize(KeyPair keyPair, Hash256 channelId, XrpAmount amount)
{
Span <byte> buffer = stackalloc byte[44];
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer, hpCLM);
channelId.CopyTo(buffer.Slice(4));
System.Buffers.Binary.BinaryPrimitives.WriteUInt64BigEndian(buffer.Slice(36), amount.Drops);
return(keyPair.Sign(buffer));
}
private protected Transaction(JsonElement json)
{
JsonElement element;
Account = new AccountId(json.GetProperty("Account").GetString());
Fee = XrpAmount.ReadJson(json.GetProperty("Fee"));
Sequence = json.GetProperty("Sequence").GetUInt32();
if (json.TryGetProperty("AccountTxnID", out element))
{
AccountTxnID = new Hash256(element.GetString());
}
if (json.TryGetProperty("Flags", out element))
{
Flags = element.GetUInt32();
}
if (json.TryGetProperty("LastLedgerSequence", out element))
{
LastLedgerSequence = element.GetUInt32();
}
if (json.TryGetProperty("Memos", out element))
{
var MemosArray = new Memo[element.GetArrayLength()];
for (int i = 0; i < MemosArray.Length; ++i)
{
MemosArray[i] = new Memo(element[i]);
}
Memos = Array.AsReadOnly(MemosArray);
}
if (json.TryGetProperty("Signers", out element))
{
var SignersArray = new Signer[element.GetArrayLength()];
for (int i = 0; i < SignersArray.Length; ++i)
{
SignersArray[i] = new Signer(element[i]);
}
Signers = Array.AsReadOnly(SignersArray);
}
if (json.TryGetProperty("SourceTag", out element))
{
SourceTag = element.GetUInt32();
}
if (json.TryGetProperty("SigningPubKey", out element))
{
SigningPubKey = element.GetBytesFromBase16();
}
if (json.TryGetProperty("TicketSequence", out element))
{
TicketSequence = element.GetUInt32();
}
if (json.TryGetProperty("TxnSignature", out element))
{
TxnSignature = element.GetBytesFromBase16();
}
}
public static bool Verify(PublicKey publicKey, ReadOnlySpan <byte> signature, Hash256 channelId, XrpAmount amount)
{
Span <byte> buffer = stackalloc byte[44];
System.Buffers.Binary.BinaryPrimitives.WriteUInt32BigEndian(buffer, hpCLM);
channelId.CopyTo(buffer.Slice(4));
System.Buffers.Binary.BinaryPrimitives.WriteUInt64BigEndian(buffer.Slice(36), amount.Drops);
return(publicKey.Verify(buffer, signature));
}
