signEd25519WithScalar()
SIP Protocol API Reference v0.12.0
SIP Protocol API Reference / signEd25519WithScalar
Function: signEd25519WithScalar()
Section titled “Function: signEd25519WithScalar()”signEd25519WithScalar(
message,scalar):Uint8Array
Defined in: @sip-protocol/sdk/dist/index-rqQpCeVM.d.ts:17601
Produce an RFC 8032 Ed25519 signature from a raw little-endian scalar.
Unlike Keypair/tweetnacl signing (which expects a 32-byte seed and re-derives the
scalar via SHA-512 + clamp), this signs directly with the provided scalar a whose
public key is A = a·G. The per-signature nonce is derived deterministically from a
hash of the scalar and the message (RFC 8032 structure): unique per message, never
reused across distinct messages.
Parameters
Section titled “Parameters”message
Section titled “message”Uint8Array
Exact bytes to sign (e.g. a compiled transaction message)
scalar
Section titled “scalar”Uint8Array
32-byte little-endian ed25519 scalar (the stealth private key)
Returns
Section titled “Returns”Uint8Array
64-byte signature (R ‖ S)
Throws
Section titled “Throws”If the scalar reduces to zero