text: CREATE TABLE IF NOT EXISTS watch_list
  (
      id      SERIAL      PRIMARY KEY,
      symbol  VARCHAR(25) NOT NULL,
      name    VARCHAR(25) NOT NULL,
      address VARCHAR(72) NOT NULL UNIQUE
  );
  
  CREATE TABLE IF NOT EXISTS transfers
  (
      id                SERIAL       PRIMARY KEY,
      tx_hash           VARCHAR(100) NOT NULL,
      block_number      INTEGER      NOT NULL,
      receiver_address  VARCHAR(72)  NOT NULL,
      receiver_memo     VARCHAR(72),
      is_token_transfer BOOLEAN      NOT NULL DEFAULT FALSE,
      amount            DECIMAL      NOT NULL,
      chain             VARCHAR(25)  NOT NULL,
      token_address     VARCHAR(72)  DEFAULT NULL
  );
  