25 lines
561 B
PL/PgSQL
25 lines
561 B
PL/PgSQL
CREATE OR REPLACE FUNCTION donate(sats INTEGER, user_id INTEGER)
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RETURNS INTEGER
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LANGUAGE plpgsql
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AS $$
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DECLARE
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user_sats INTEGER;
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BEGIN
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PERFORM ASSERT_SERIALIZED();
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SELECT msats / 1000
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INTO user_sats
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FROM users WHERE id = user_id;
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IF sats > user_sats THEN
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RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
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END IF;
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UPDATE users SET msats = msats - (sats * 1000) WHERE id = user_id;
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INSERT INTO "Donation" (sats, "userId", created_at, updated_at)
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VALUES (sats, user_id, now_utc(), now_utc());
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RETURN sats;
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END;
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$$; |