multi: add outpoint field to mint anchor uni commitment

This'll be useful to fix a bug in the next commit, where we weren't
actually able to effectivley look up which pre commitment was being
spent by a new supply commit.

Author: Roasbeef

tapdb/migrations.go

@@ -24,7 +24,7 @@ const (
 	// daemon.
 	//
 	// NOTE: This MUST be updated when a new migration is added.
-	LatestMigrationVersion = 43
+	LatestMigrationVersion = 44
 )
 
 // DatabaseBackend is an interface that contains all methods our different

tapdb/sqlc/assets.sql.go

@@ -0,0 +1,3 @@
+-- Remove the outpoint column and its index
+DROP INDEX IF EXISTS mint_anchor_uni_commitments_outpoint_idx;
+ALTER TABLE mint_anchor_uni_commitments DROP COLUMN outpoint;

tapdb/sqlc/migrations/000044_mint_anchor_outpoint.down.sql

@@ -0,0 +1,9 @@
+-- Add outpoint field to mint_anchor_uni_commitments to track the exact UTXO
+-- This allows precise marking of spent pre-commitments using the transaction inputs
+ALTER TABLE mint_anchor_uni_commitments
+    ADD COLUMN outpoint BLOB;
+
+-- Create an index for efficient lookups by outpoint
+CREATE INDEX mint_anchor_uni_commitments_outpoint_idx 
+    ON mint_anchor_uni_commitments(outpoint)
+    WHERE outpoint IS NOT NULL;

tapdb/sqlc/migrations/000044_mint_anchor_outpoint.up.sql

@@ -1073,16 +1073,17 @@ WITH target_batch AS (
     WHERE keys.raw_key = @batch_key
 )
 INSERT INTO mint_anchor_uni_commitments (
-    batch_id, tx_output_index, taproot_internal_key_id, group_key, spent_by
+    batch_id, tx_output_index, taproot_internal_key_id, group_key, spent_by, outpoint
 )
 VALUES (
     (SELECT batch_id FROM target_batch), @tx_output_index, 
-    @taproot_internal_key_id, @group_key, sqlc.narg('spent_by')
+    @taproot_internal_key_id, @group_key, sqlc.narg('spent_by'), sqlc.narg('outpoint')
 )
 ON CONFLICT(batch_id, tx_output_index) DO UPDATE SET
     -- The following fields are updated if a conflict occurs.
     taproot_internal_key_id = EXCLUDED.taproot_internal_key_id,
-    group_key = EXCLUDED.group_key
+    group_key = EXCLUDED.group_key,
+    outpoint = EXCLUDED.outpoint
 RETURNING id;
 
 -- name: FetchMintAnchorUniCommitment :many

tapdb/sqlc/models.go

@@ -172,6 +172,13 @@ WHERE
     mac.group_key = @group_key AND
     (mac.spent_by IS NULL OR commit_txn.block_hash IS NULL);
 
+-- name: MarkPreCommitmentSpentByOutpoint :exec
+-- Mark a specific pre-commitment output as spent by its outpoint.
+UPDATE mint_anchor_uni_commitments
+SET spent_by = @spent_by_commit_id
+WHERE outpoint = @outpoint
+    AND spent_by IS NULL;
+
 -- name: FetchSupplyCommit :one
 SELECT
     sc.commit_id,

tapdb/sqlc/querier.go

@@ -637,7 +637,11 @@ CREATE TABLE mint_anchor_uni_commitments (
     group_key BLOB
 , taproot_internal_key_id
 BIGINT REFERENCES internal_keys(key_id)
-NOT NULL, spent_by BIGINT REFERENCES supply_commitments(commit_id));
+NOT NULL, spent_by BIGINT REFERENCES supply_commitments(commit_id), outpoint BLOB);
+
+CREATE INDEX mint_anchor_uni_commitments_outpoint_idx 
+    ON mint_anchor_uni_commitments(outpoint)
+    WHERE outpoint IS NOT NULL;
 
 CREATE UNIQUE INDEX mint_anchor_uni_commitments_unique
     ON mint_anchor_uni_commitments (batch_id, tx_output_index);