feat(db): update indexes and add nbtc_withdrawal

packages/btcindexer/db/migrations/0001_initial_schema.sql

@@ -5,6 +5,8 @@ CREATE TABLE processed_blocks (
     processed_at INTEGER DEFAULT unixepoch('subsec')
 ) STRICT;
 
+---------- NBTC Minting and Withdrawal ----------
+
 -- This table tracks the nBTC deposit txs
 CREATE TABLE nbtc_txs (
     tx_id TEXT PRIMARY KEY,
@@ -18,7 +20,27 @@ CREATE TABLE nbtc_txs (
     updated_at INTEGER DEFAULT unixepoch('subsec')
 ) STRICT;
 
--- Indexes
 CREATE INDEX nbtc_txs_status ON nbtc_txs (status);
-CREATE INDEX nbtc_txs_sui_recipient ON nbtc_txs (sui_recipient);
-CREATE INDEX processed_blocks_height ON processed_blocks (height);
+CREATE INDEX nbtc_txs_sui_recipient ON nbtc_txs (sui_recipient, created_at);
+
+-- nbtc_withdrawal table tracks nBTC withdraw transactions from SUI
+CREATE TABLE nbtc_withdrawal (
+	sui_tx_id TEXT PRIMARY KEY,
+	sender TEXT NOT NULL, -- sui sender
+	amount INTEGER NOT NULL, -- amount of nBTC to be burn and withdraw on BTC,
+	recipient TEXT NOT NULL, -- the bitcoin address or script that will recive the BTC,
+	note TEXT, -- additional note that we can include for the user. eg. you are sending funds to a collegue, this note will be included (maybe op_return?)
+	sent_at INTEGER NOT NULL,
+	btc_tx_id TEXT, -- will be set once Bitcoin tx will be broadcasted
+	status INTEGER NOT NULL
+) STRICT;
+
+CREATE INDEX nbtc_withdraw_sender ON nbtc_withdrawal (sender, recipient, sent_at);
+
+-- nbtc_withdrawal.status:
+-- 1 = requested
+-- 2 = burn
+-- 3 = signing -- ika signature
+-- 4 = signed
+-- 5 = broadcasted to bitcoin
+-- 6 = confirmations (here user technically already has the funds)