ed3a681950
* we calculate image fees during item creation and update now * function imageFees returns queries which deduct fees from user and mark images as paid + fees * queries need to be run inside same transaction as item creation/update
25 lines
677 B
PL/PgSQL
25 lines
677 B
PL/PgSQL
-- function to manually deduct fees from user, for example for images fees
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CREATE OR REPLACE FUNCTION user_fee(user_id INTEGER, item_id INTEGER, cost_msats BIGINT)
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RETURNS users
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LANGUAGE plpgsql
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AS $$
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DECLARE
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user users;
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user_msats BIGINT;
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BEGIN
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PERFORM ASSERT_SERIALIZED();
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SELECT msats INTO user_msats FROM users WHERE id = user_id;
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IF cost_msats > user_msats THEN
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RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
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END IF;
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UPDATE users SET msats = msats - cost_msats WHERE id = user_id RETURNING * INTO user;
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INSERT INTO "ItemAct" (msats, "itemId", "userId", act)
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VALUES (cost_msats, item_id, user_id, 'FEE');
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RETURN user;
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END;
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$$;
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