Minor regex optimizations…

utils/destination_types.go

@@ -29,10 +29,10 @@ const ScriptMetanet = "metanet"
 const ScriptTypeTokenStas = "stas"
 
 // p2PKHRegexp OP_DUP OP_HASH160 [pubkey hash] OP_EQUALVERIFY OP_CHECKSIG
-var p2PKHRegexp, _ = regexp.Compile("^76a914[0-9a-f]{40}88ac$")
+var p2PKHRegexp, _ = regexp.Compile("^76a914[\\da-f]{40}88ac$")
 
 // p2SHRegexp OP_HASH160 [hash] OP_EQUAL
-var p2SHRegexp, _ = regexp.Compile("^a914[0-9a-f]{40}87$")
+var p2SHRegexp, _ = regexp.Compile("^a914[\\da-f]{40}87$")
 
 // metanetRegexp OP_FALSE OP_RETURN 1635018093
 var metanetRegexp, _ = regexp.Compile("^006a046d65746142")
@@ -41,7 +41,7 @@ var metanetRegexp, _ = regexp.Compile("^006a046d65746142")
 var opReturnRegexp, _ = regexp.Compile("^006a")
 
 // stasRegexp OP_DUP OP_HASH160 [pubkey hash] OP_EQUALVERIFY OP_CHECKSIG OP_VERIFY ...
-var stasRegexp, _ = regexp.Compile("^76a914[0-9a-f]{40}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[0-9a-fA-F]{40}(0100|0101).*$")
+var stasRegexp, _ = regexp.Compile("^76a914[\\da-f]{40}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[\\da-fA-F]{40}(0100|0101).*$")
 
 // IsP2PKH Check whether the given string is a p2pkh output
 func IsP2PKH(lockingScript string) bool {

utils/keys.go

@@ -17,8 +17,7 @@ func DeriveChildKeyFromHex(hdKey *bip32.ExtendedKey, hexHash string) (*bip32.Ext
 	}
 
 	for _, num := range childNums {
-		childKey, err = childKey.Child(num)
-		if err != nil {
+		if childKey, err = childKey.Child(num); err != nil {
 			return nil, err
 		}
 	}

utils/scripts.go

@@ -21,12 +21,9 @@ func GetUnlockingScript(tx *bt.Tx, inputIndex uint32, privateKey *bec.PrivateKey
 		return nil, err
 	}
 
-	pubKey := privateKey.PubKey().SerialiseCompressed()
-	signature := sig.Serialise()
-
 	var s *bscript.Script
 	if s, err = bscript.NewP2PKHUnlockingScript(
-		pubKey, signature, shf,
+		privateKey.PubKey().SerialiseCompressed(), sig.Serialise(), shf,
 	); err != nil {
 		return nil, err
 	}

utils/scripts_test.go

@@ -0,0 +1,7 @@
+package utils
+
+import "testing"
+
+func TestGetUnlockingScript(t *testing.T) {
+	// todo: finish this test!
+}