lnd+signrescuefunding: use DeriveNonStandard to be compatible with lnd

cmd/chantools/signrescuefunding.go

@@ -45,7 +45,7 @@ broadcast by any Bitcoin node.`,
 	)
 
 	cc.rootKey = newRootKey(cc.cmd, "deriving keys")
-	
+
 	return cc.cmd
 }
 
@@ -158,7 +158,7 @@ func findLocalMultisigKey(multisigBranch *hdkeychain.ExtendedKey,
 
 	// Loop through the local multisig keys to find the target key.
 	for index := uint32(0); index < MaxChannelLookup; index++ {
-		currentKey, err := multisigBranch.Derive(index)
+		currentKey, err := multisigBranch.DeriveNonStandard(index)
 		if err != nil {
 			return nil, fmt.Errorf("error deriving child key: %v",
 				err)

lnd/hdkeychain.go

@@ -32,7 +32,7 @@ func DeriveChildren(key *hdkeychain.ExtendedKey, path []uint32) (
 		err        error
 	)
 	for _, pathPart := range path {
-		currentKey, err = currentKey.Derive(pathPart)
+		currentKey, err = currentKey.DeriveNonStandard(pathPart)
 		if err != nil {
 			return nil, err
 		}