sending btc transactions with schnorr multi-signature

[robertcc0410]

l2-->l1 sending btc transactions with schnorr multi-signature

[oxf71]

https://github.com/btcsuite/btcd/blob/master/btcec/schnorr/musig2/musig2_test.go

[oxf71]

schnorr musig2 demo:

https://github.com/oxf71/musig2-demo

[oxf71]

taproot transaction use musig2 example:
https://github.com/oxf71/musig2-demo/blob/main/example/taprootmusig/main.go

todo:

• Research the use of schnorr musig2 for transfers: @robertcc0410
• Improve the method of schnorr musig2: @oxf71

[robertcc0410]

schnorr multi-signature done(n-n)
Notice：

	unspentOutputs := make([]*btcapi.UnspentOutput, 0)
	for _, utxo := range utxos {
		txHash, err := chainhash.NewHashFromStr(utxo.Txid)
		if err != nil {
			return nil, err
		}
		pkScript, err := txscript.PayToAddrScript(address)
		if err != nil {
			return nil, err
		}

		unspentOutputs = append(unspentOutputs, &btcapi.UnspentOutput{
			Outpoint: wire.NewOutPoint(txHash, uint32(utxo.Vout)),
			Output:   wire.NewTxOut(utxo.Value, pkScript),
		})
	}
	return unspentOutputs, nil

Need to implement psbt multi-signature transactions(m-n)

[oxf71]

https://github.com/bitcoin/bitcoin/blob/master/doc/descriptors.md#basic-multisig-example