def to_public_key(self, secp) -> PublicKey:
assert isinstance(secp, Secp256k1)
obj = PublicKey(secp)
res = lib.secp256k1_pedersen_commitment_to_pubkey(
secp.ctx, obj.key, self.commitment)
assert res, "Unable to convert to public key"
return obj
def bullet_proof_multisig_1(
self, value: int, blind: SecretKey, commit: Commitment,
common_nonce: SecretKey, nonce: SecretKey,
extra_data: bytearray) -> (PublicKey, PublicKey):
scratch = lib.secp256k1_scratch_space_create(self.ctx, 256 * MAX_WIDTH)
t_1 = PublicKey(self)
t_2 = PublicKey(self)
blind_key = ffi.new("char []", bytes(blind.key))
res = lib.secp256k1_bulletproof_rangeproof_prove(
self.ctx, scratch, self.gens, ffi.NULL, ffi.NULL, ffi.NULL,
t_1.key, t_2.key, [value], ffi.NULL, [blind_key],
[commit.commitment], 1, self.GENERATOR_H, 64,
bytes(common_nonce.key), bytes(nonce.key), bytes(extra_data),
len(extra_data), ffi.NULL)
lib.secp256k1_scratch_space_destroy(scratch)
assert res, "Unable to generate multisig bulletproof"
return t_1, t_2