How can I use it in the Solana chain

[008mkcir]

Hi there,

Is this lib could be used for Solana network?

I am trying to use this lib to sign the Solana transaction which build-up from this Solana SDK.

        c := rpc.New("https://api.devnet.solana.com")

	pubKeyByte := base58.Decode(pubKeyBase58)
	t.Logf("sol pub key: %+v", pubKeyByte)
	t.Logf("sol pub key base58: %s", pubKeyBase58)
	accountFrom := solana.MustPublicKeyFromBase58(pubKeyBase58)
	accountTo := solana.MustPublicKeyFromBase58(pubKeyBase58)
	amount := uint64(1)
	sigBase58, err := c.RequestAirdrop(context.Background(), accountFrom, solana.LAMPORTS_PER_SOL, rpc.CommitmentConfirmed)
	t.Logf("airdrop sig base58: %s", sigBase58)

	recentHash, err := c.GetRecentBlockhash(context.Background(), rpc.CommitmentFinalized)
	if err != nil {
		panic(err)
	}
	t.Logf("recent block hash: %s", recentHash.Value.Blockhash)

	tx, err := solana.NewTransaction(
		[]solana.Instruction{
			system.NewTransferInstruction(
				amount,
				accountFrom,
				accountTo,
			).Build(),
		},
		solana.MustHashFromBase58(recentHash.Value.Blockhash.String()),
		solana.TransactionPayer(accountFrom),
	)
	if err != nil {
		panic(err)
	}
	msg, err := tx.Message.MarshalBinary()
	if err != nil {
		panic(err)
	}

        // use it as original message
	msgBigInt := (&big.Int{}).SetBytes(msg)

Then, I pass msgBigInt to signing function (like TestE2EConcurrent test case flow) to get the r, s signature.

...
		case <-endCh:
			atomic.AddInt32(&ended, 1)
			if atomic.LoadInt32(&ended) == int32(len(signPIDs)) {
				t.Logf("Done. Received signature data from %d participants", ended)
				R := parties[0].temp.r

				// BEGIN check s correctness
				sumS := parties[0].temp.si
				for i, p := range parties {
					if i == 0 {
						continue
					}

					var tmpSumS [32]byte
					edwards25519.ScMulAdd(&tmpSumS, sumS, bigIntToEncodedBytes(big.NewInt(1)), p.temp.si)
					sumS = &tmpSumS
				}
				fmt.Printf("S: %s\n", encodedBytesToBigInt(sumS).String())
				fmt.Printf("R: %s\n", R.String())
				// END check s correctness

				// BEGIN EDDSA verify
				pkX, pkY := keys[0].EDDSAPub.X(), keys[0].EDDSAPub.Y()
				pk := edwards.PublicKey{
					Curve: tss.Edwards(),
					X:     pkX,
					Y:     pkY,
				}
				t.Logf("combine pub key: %s", base58.Encode(pk.Serialize()))

                                 newSig, err := edwards.ParseSignature(parties[0].data.Signature)
				if err != nil {
					println("new sig error, ", err.Error())
				}

				ok := edwards.Verify(&pk, msg, newSig.R, newSig.S)
				assert.True(t, ok, "eddsa verify must pass")
				t.Log("EDDSA signing test done.")
				// END EDDSA verify

				signingSigBytes := make([]byte, 64)
				copy(signingSigBytes[:32], newSig.R.Bytes())
				copy(signingSigBytes[32:], newSig.S.Bytes())

				signature := solana.SignatureFromBytes(signingSigBytes)
				t.Logf("sign sig: %s", signature)
				tx.Signatures = append(tx.Signatures, signature)
				err = tx.VerifySignatures()
				if err != nil {
					panic(err)
				}

Test it with VerifySignatures() function, but got the transaction signature failed
panic: invalid signature by FKAAiwGD73AWgW6WhETAqvuoqHjLLbibSwiSJfU1qt5r

How can I fix it?
Thanks.

[trivonhan]

Hi there,

Is this lib could be used for Solana network?

I am trying to use this lib to sign the Solana transaction which build-up from this Solana SDK.

        c := rpc.New("https://api.devnet.solana.com")

	pubKeyByte := base58.Decode(pubKeyBase58)
	t.Logf("sol pub key: %+v", pubKeyByte)
	t.Logf("sol pub key base58: %s", pubKeyBase58)
	accountFrom := solana.MustPublicKeyFromBase58(pubKeyBase58)
	accountTo := solana.MustPublicKeyFromBase58(pubKeyBase58)
	amount := uint64(1)
	sigBase58, err := c.RequestAirdrop(context.Background(), accountFrom, solana.LAMPORTS_PER_SOL, rpc.CommitmentConfirmed)
	t.Logf("airdrop sig base58: %s", sigBase58)

	recentHash, err := c.GetRecentBlockhash(context.Background(), rpc.CommitmentFinalized)
	if err != nil {
		panic(err)
	}
	t.Logf("recent block hash: %s", recentHash.Value.Blockhash)

	tx, err := solana.NewTransaction(
		[]solana.Instruction{
			system.NewTransferInstruction(
				amount,
				accountFrom,
				accountTo,
			).Build(),
		},
		solana.MustHashFromBase58(recentHash.Value.Blockhash.String()),
		solana.TransactionPayer(accountFrom),
	)
	if err != nil {
		panic(err)
	}
	msg, err := tx.Message.MarshalBinary()
	if err != nil {
		panic(err)
	}

        // use it as original message
	msgBigInt := (&big.Int{}).SetBytes(msg)

Then, I pass msgBigInt to signing function (like TestE2EConcurrent test case flow) to get the r, s signature.

...
		case <-endCh:
			atomic.AddInt32(&ended, 1)
			if atomic.LoadInt32(&ended) == int32(len(signPIDs)) {
				t.Logf("Done. Received signature data from %d participants", ended)
				R := parties[0].temp.r

				// BEGIN check s correctness
				sumS := parties[0].temp.si
				for i, p := range parties {
					if i == 0 {
						continue
					}

					var tmpSumS [32]byte
					edwards25519.ScMulAdd(&tmpSumS, sumS, bigIntToEncodedBytes(big.NewInt(1)), p.temp.si)
					sumS = &tmpSumS
				}
				fmt.Printf("S: %s\n", encodedBytesToBigInt(sumS).String())
				fmt.Printf("R: %s\n", R.String())
				// END check s correctness

				// BEGIN EDDSA verify
				pkX, pkY := keys[0].EDDSAPub.X(), keys[0].EDDSAPub.Y()
				pk := edwards.PublicKey{
					Curve: tss.Edwards(),
					X:     pkX,
					Y:     pkY,
				}
				t.Logf("combine pub key: %s", base58.Encode(pk.Serialize()))

                                 newSig, err := edwards.ParseSignature(parties[0].data.Signature)
				if err != nil {
					println("new sig error, ", err.Error())
				}

				ok := edwards.Verify(&pk, msg, newSig.R, newSig.S)
				assert.True(t, ok, "eddsa verify must pass")
				t.Log("EDDSA signing test done.")
				// END EDDSA verify

				signingSigBytes := make([]byte, 64)
				copy(signingSigBytes[:32], newSig.R.Bytes())
				copy(signingSigBytes[32:], newSig.S.Bytes())

				signature := solana.SignatureFromBytes(signingSigBytes)
				t.Logf("sign sig: %s", signature)
				tx.Signatures = append(tx.Signatures, signature)
				err = tx.VerifySignatures()
				if err != nil {
					panic(err)
				}

Test it with VerifySignatures() function, but got the transaction signature failed panic: invalid signature by FKAAiwGD73AWgW6WhETAqvuoqHjLLbibSwiSJfU1qt5r

How can I fix it? Thanks.

Did you solve this?

[web3rover]

You should pass Signature from SignatureData end channel to solana. SignatureFromBytes directly. No need of signingSigBytes