wallet: Add function to retrieve transactions from the wallet

Signed-off-by: Christian Decker <decker.christian@gmail.com>

wallet/wallet.c

@@ -2806,3 +2806,27 @@ void wallet_clean_utxos(struct wallet *w, struct bitcoind *bitcoind)
 	} else
 		tal_free(utxos);
 }
+
+struct wallet_transaction *wallet_transactions_get(struct wallet *w, const tal_t *ctx)
+{
+	sqlite3_stmt *stmt;
+	size_t count;
+	struct wallet_transaction *cur, *txs = tal_arr(ctx, struct wallet_transaction, 0);
+
+	stmt = db_select_prepare(w->db,
+				 "id, id, rawtx, blockheight, txindex, type, channel_id "
+				 "FROM transactions");
+	for (count = 0; db_select_step(w->db, stmt); count++) {
+		tal_resize(&txs, count + 1);
+		cur = &txs[count];
+		sqlite3_column_sha256_double(stmt, 1, &cur->id.shad);
+		cur->rawtx = tal_dup_arr(txs, u8, sqlite3_column_blob(stmt, 2),
+					 sqlite3_column_bytes(stmt, 2), 0);
+		cur->blockheight = sqlite3_column_int(stmt, 3);
+		cur->txindex = sqlite3_column_int(stmt, 4);
+		cur->type = sqlite3_column_int(stmt, 5);
+		cur->channel_id = sqlite3_column_int(stmt, 6);
+	}
+
+	return txs;
+}

wallet/wallet.h

@@ -289,6 +289,15 @@ struct channeltx {
 	u32 depth;
 };
 
+struct wallet_transaction {
+	struct bitcoin_txid id;
+	u32 blockheight;
+	u32 txindex;
+	u8 *rawtx;
+	txtypes type;
+	u64 channel_id;
+};
+
 /**
  * wallet_new - Constructor for a new sqlite3 based wallet
  *
@@ -1131,4 +1140,14 @@ void add_unreleased_tx(struct wallet *w, struct unreleased_tx *utx);
 
 /* These will touch the db, so need to be explicitly freed. */
 void free_unreleased_txs(struct wallet *w);
+
+/**
+ * Get a list of transactions that we track in the wallet.
+ *
+ * @param ctx: allocation context for the returned list
+ * @param wallet: Wallet to load from.
+ * @return A tal_arr of wallet transactions
+ */
+struct wallet_transaction *wallet_transactions_get(struct wallet *w, const tal_t *ctx);
+
 #endif /* LIGHTNING_WALLET_WALLET_H */