walletrpc: Add Taproot witness types to rpc.

lnrpc/walletrpc/walletkit.proto

@@ -976,6 +976,91 @@ enum WitnessType {
     to an output which is under complete control of the backing wallet.
     */
     TAPROOT_PUB_KEY_SPEND = 22;
+
+    /*
+    A witness type that allows us to spend our settled local commitment after a
+    CSV delay when we force close the channel.
+    */
+    TAPROOT_LOCAL_COMMIT_SPEND = 23;
+
+    /*
+    A witness type that allows us to spend our settled local commitment after
+    a CSV delay when the remote party has force closed the channel.
+    */
+    TAPROOT_REMOTE_COMMIT_SPEND = 24;
+
+    /*
+    A witness type that we'll use for spending our own anchor output.
+    */
+    TAPROOT_ANCHOR_SWEEP_SPEND = 25;
+
+    /*
+    A witness that allows us to timeout an HTLC we offered to the remote party
+    on our commitment transaction. We use this when we need to go on chain to
+    time out an HTLC.
+    */
+    TAPROOT_HTLC_OFFERED_TIMEOUT_SECOND_LEVEL = 26;
+
+    /*
+    A witness type that allows us to sweep an HTLC we accepted on our commitment
+    transaction after we go to the second level on chain.
+    */
+    TAPROOT_HTLC_ACCEPTED_SUCCESS_SECOND_LEVEL = 27;
+
+    /*
+    A witness that allows us to sweep an HTLC on the revoked transaction of the
+    remote party that goes to the second level.
+    */
+    TAPROOT_HTLC_SECOND_LEVEL_REVOKE = 28;
+
+    /*
+    A witness that allows us to sweep an HTLC sent to us by the remote party
+    in the event that they broadcast a revoked state.
+    */
+    TAPROOT_HTLC_ACCEPTED_REVOKE = 29;
+
+    /*
+    A witness that allows us to sweep an HTLC we offered to the remote party if
+    they broadcast a revoked commitment.
+    */
+    TAPROOT_HTLC_OFFERED_REVOKE = 30;
+
+    /*
+    A witness that allows us to sweep an HTLC we offered to the remote party
+    that lies on the commitment transaction for the remote party. We can spend
+    this output after the absolute CLTV timeout of the HTLC as passed.
+    */
+    TAPROOT_HTLC_OFFERED_REMOTE_TIMEOUT = 31;
+
+    /*
+    A witness type that allows us to sign the second level HTLC timeout
+    transaction when spending from an HTLC residing on our local commitment
+    transaction.
+    This is used by the sweeper to re-sign inputs if it needs to aggregate
+    several second level HTLCs.
+    */
+    TAPROOT_HTLC_LOCAL_OFFERED_TIMEOUT = 32;
+
+    /*
+    A witness that allows us to sweep an HTLC that was offered to us by the
+    remote party for a taproot channels. We use this witness in the case that
+    the remote party goes to chain, and we know the pre-image to the HTLC. We
+    can sweep this without any additional timeout.
+    */
+    TAPROOT_HTLC_ACCEPTED_REMOTE_SUCCESS = 33;
+
+    /*
+    A witness type that allows us to sweep the HTLC offered to us on our local
+    commitment transaction. We'll use this when we need to go on chain to sweep
+    the HTLC. In this case, this is the second level HTLC success transaction.
+    */
+    TAPROOT_HTLC_ACCEPTED_LOCAL_SUCCESS = 34;
+
+    /*
+    A witness that allows us to sweep the settled output of a malicious
+    counterparty's who broadcasts a revoked taproot commitment transaction.
+    */
+    TAPROOT_COMMITMENT_REVOKE = 35;
 }
 
 message PendingSweep {