Delegate NonceFunction

Namespace

Secp256k1Net

Assembly

Secp256k1.Net.dll

A pointer to a function to deterministically generate a nonce.

public delegate int NonceFunction(Span<byte> nonce32, ReadOnlySpan<byte> msg32, ReadOnlySpan<byte> key32, ReadOnlySpan<byte> algo16, nint data, uint attempt)

Parameters

nonce32 Span<byte>

pointer to a 32-byte array to be filled by the function.

msg32 ReadOnlySpan<byte>

the 32-byte message hash being verified (will not be NULL)

key32 ReadOnlySpan<byte>

pointer to a 32-byte secret key (will not be NULL)

algo16 ReadOnlySpan<byte>

pointer to a 16-byte array describing the signature algorithm (will be NULL for ECDSA for compatibility).

data nint

Arbitrary data pointer that is passed through.

attempt uint

how many iterations we have tried to find a nonce. This will almost always be 0, but different attempt values are required to result in a different nonce.

Except for test cases, this function should compute some cryptographic hash of the message, the algorithm, the key and the attempt.

Returns

int

1 on success, 0 on failure.