CREATE TABLE deposits (
  id          BIGSERIAL PRIMARY KEY,
  event_id    BIGINT NOT NULL REFERENCES events(id) UNIQUE,
  occurred_at TIMESTAMPTZ NOT NULL,
  exchange    TEXT NOT NULL,
  fiat_amount NUMERIC(18,2) NOT NULL,
  fiat_currency TEXT NOT NULL,
  amount_eur  NUMERIC(18,2),
  amount_dkk  NUMERIC(18,2),
  amount_usd  NUMERIC(18,2),
  note        TEXT
);