darkfi/example/simple.zk

k = 13;

constant "Simple" {
	EcFixedPointShort VALUE_COMMIT_VALUE,
	EcFixedPoint VALUE_COMMIT_RANDOM,
}

witness "Simple" {
	Base value,
	Scalar value_blind,
}

circuit "Simple" {
	# Pedersen commitment for coin's value
	vcv = ec_mul_short(value, VALUE_COMMIT_VALUE);
	vcr = ec_mul(value_blind, VALUE_COMMIT_RANDOM);
	value_commit = ec_add(vcv, vcr);
	# Since the value commit is a curve point, we fetch its coordinates
	# and constrain them:
	value_commit_x = ec_get_x(value_commit);
	value_commit_y = ec_get_y(value_commit);
	constrain_instance(value_commit_x);
	constrain_instance(value_commit_y);
}