test/specs/generic/consensus/base/transaction/SignatureProof.spec.js

describe('SignatureProof', () => {

    it('can create and verify a signature proof', () => {
        const data = BufferUtils.fromAscii('test message');
        const keyPair = KeyPair.generate();
        const publicKeys = [keyPair.publicKey];
        for (let i = 0; i < 6; ++i) {
            publicKeys.push(KeyPair.generate().publicKey);
        }

        for (let i = 1; i < 6; ++i) {
            const address = Address.fromHash(MerkleTree.computeRoot(publicKeys.slice(0, i)));
            const relevantKeys = publicKeys.slice(0, i);

            const sig = Signature.create(keyPair.privateKey, keyPair.publicKey, data);
            const proof = SignatureProof.multiSig(keyPair.publicKey, relevantKeys, sig);

            expect(proof.verify(address, data)).toBe(true, `Verification failed ${i}`);
            expect(SignatureProof.unserialize(proof.serialize()).equals(proof)).toBe(true, `Serialization failed ${i}`);
        }
    });
});