db setup and teardown suite

setup/db/tables/transactions/CREATE.sql

@@ -0,0 +1,9 @@
+CREATE TABLE transactions(
+    tx_id INT,
+    address TEXT,
+    value INT,
+    tx_hash TEXT,
+    block_id INT,
+    timestamp TIMESTAMP,
+    PRIMARY KEY (tx_id, address)
+) WITH CLUSTERING ORDER BY (address DESC);

setup/db/tables/transactions/DROP.sql

@@ -0,0 +1 @@
+DROP TABLE transactions