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input: add PayToTaprootScript helper func

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In this commit, we add a helper function to take a taproot output key
and turn it into a v1 witness program.
This commit is contained in:
Olaoluwa Osuntokun 2023-01-16 19:57:03 -08:00
parent 9851a6147b
commit 92868cfaa5
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1 changed files with 13 additions and 0 deletions
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13
input/taproot.go
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@ -4,6 +4,7 @@ import (
"fmt"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcd/btcec/v2/schnorr"
"github.com/btcsuite/btcd/txscript"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcwallet/waddrmgr"
@ -135,3 +136,15 @@ func TapscriptFullKeyOnly(taprootKey *btcec.PublicKey) *waddrmgr.Tapscript {
FullOutputKey: taprootKey,
}
}
// PayToTaprootScript creates a new script to pay to a version 1 (taproot)
// witness program. The passed public key will be serialized as an x-only key
// to create the witness program.
func PayToTaprootScript(taprootKey *btcec.PublicKey) ([]byte, error) {
builder := txscript.NewScriptBuilder()
builder.AddOp(txscript.OP_1)
builder.AddData(schnorr.SerializePubKey(taprootKey))
return builder.Script()
}