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author | Christian Grothoff <christian@grothoff.org> | 2021-12-09 23:17:15 +0100 |
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committer | Christian Grothoff <christian@grothoff.org> | 2021-12-09 23:17:15 +0100 |
commit | 386301d1cf48ad3c87df1733cd7a82957ff6c383 (patch) | |
tree | e67f39ebd8e405fcff2f41cf219abe2667bed599 /src | |
parent | 4c8b99f333064b3c0801aa926a74d155b1e22a5f (diff) | |
download | exchange-386301d1cf48ad3c87df1733cd7a82957ff6c383.tar.xz |
-was integrated
Diffstat (limited to 'src')
-rw-r--r-- | src/exchangedb/melt.sql | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/src/exchangedb/melt.sql b/src/exchangedb/melt.sql deleted file mode 100644 index fc6d24d45..000000000 --- a/src/exchangedb/melt.sql +++ /dev/null @@ -1,171 +0,0 @@ - --- Everything in one big transaction --- BEGIN; - --- Check patch versioning is in place. --- SELECT _v.register_patch('exchange-000x', NULL, NULL); - - -CREATE OR REPLACE FUNCTION exchange_check_coin_balance( - IN denom_val INT8, -- value of the denomination of the coin - IN denom_frac INT4, -- value of the denomination of the coin - IN in_coin_pub BYTEA, -- coin public key - IN check_recoup BOOLEAN, -- do we need to check the recoup table? - IN zombie_required BOOLEAN, -- do we need a zombie coin? - OUT balance_ok BOOLEAN, -- balance satisfied? - OUT zombie_ok BOOLEAN) -- zombie satisfied? -LANGUAGE plpgsql -AS $$ -DECLARE - coin_uuid INT8; -- known_coin_id of coin_pub -DECLARE - tmp_val INT8; -- temporary result -DECLARE - tmp_frac INT8; -- temporary result -DECLARE - spent_val INT8; -- how much of coin was spent? -DECLARE - spent_frac INT8; -- how much of coin was spent? -DECLARE - unspent_val INT8; -- how much of coin was refunded? -DECLARE - unspent_frac INT8; -- how much of coin was refunded? -BEGIN - --- Note: possible future optimization: get the coin_uuid from the previous --- 'ensure_coin_known' and pass that here instead of the coin_pub. Might help --- a tiny bit with performance. -SELECT known_coin_id INTO coin_uuid - FROM known_coins - WHERE coin_pub=in_coin_pub; - -IF NOT FOUND -THEN - -- coin unknown, should be impossible! - balance_ok=FALSE; - zombie_ok=FALSE; - ASSERT false, 'coin unknown'; - RETURN; -END IF; - - -spent_val = 0; -spent_frac = 0; -unspent_val = denom_val; -unspent_frac = denom_frac; - -SELECT - SUM(amount_with_fee_val) -- overflow here is not plausible - ,SUM(CAST(amount_with_fee_frac AS INT8)) -- compute using 64 bits - INTO - tmp_val - ,tmp_frac - FROM deposits - WHERE known_coin_id=coin_uuid; - -spent_val = spent_val + tmp_val; -spent_frac = spent_frac + tmp_frac; - -SELECT - SUM(amount_with_fee_val) -- overflow here is not plausible - ,SUM(CAST(amount_with_fee_frac AS INT8)) -- compute using 64 bits - INTO - tmp_val - ,tmp_frac - FROM refresh_commitments - WHERE old_known_coin_id=coin_uuid; - -spent_val = spent_val + tmp_val; -spent_frac = spent_frac + tmp_frac; - -SELECT - SUM(amount_with_fee_val) -- overflow here is not plausible - ,SUM(CAST(amount_with_fee_frac AS INT8)) -- compute using 64 bits - INTO - tmp_val - ,tmp_frac - FROM refunds - WHERE known_coin_id=coin_uuid; - -unspent_val = unspent_val + tmp_val; -unspent_frac = unspent_frac + tmp_frac; - --- Note: even if 'check_recoup' is true, the tables below --- are in practice likely empty (as they only apply if --- the exchange (ever) had to revoke keys). -IF check_recoup -THEN - - SELECT - SUM(amount_val) -- overflow here is not plausible - ,SUM(CAST(amount_frac AS INT8)) -- compute using 64 bits - INTO - tmp_val - ,tmp_frac - FROM recoup_refresh - WHERE known_coin_id=coin_uuid; - - unspent_val = unspent_val + tmp_val; - unspent_frac = unspent_frac + tmp_frac; - - SELECT - SUM(amount_val) -- overflow here is not plausible - ,SUM(CAST(amount_frac AS INT8)) -- compute using 64 bits - INTO - tmp_val - ,tmp_frac - FROM recoup - WHERE known_coin_id=coin_uuid; - - spent_val = spent_val + tmp_val; - spent_frac = spent_frac + tmp_frac; - - SELECT - SUM(amount_val) -- overflow here is not plausible - ,SUM(CAST(amount_frac AS INT8)) -- compute using 64 bits - INTO - tmp_val - ,tmp_frac - FROM recoup_refresh - JOIN refresh_revealed_coins rrc - USING (rrc_serial) - JOIN refresh_commitments rfc - ON (rrc.melt_serial_id = rfc.melt_serial_id) - WHERE rfc.old_known_coin_id=coin_uuid; - - spent_val = spent_val + tmp_val; - spent_frac = spent_frac + tmp_frac; - - IF ( (0 < tmp_val) OR (0 < tmp_frac) ) - THEN - -- There was a transaction that justifies the zombie - -- status, clear the flag - zombie_required=FALSE; - END IF; - -END IF; - - --- Actually check if the coin balance is sufficient. Verbosely. ;-) -IF (unspent_val > spent_val) -THEN - balance_ok=TRUE; -ELSE - IF (reserve_val == amount_val) AND (reserve_frac >= amount_frac) - THEN - balance_ok=TRUE; - ELSE - balance_ok=FALSE; - END IF; -END IF; - -zombie_ok = NOT zombie_required; - -END $$; - -COMMENT ON FUNCTION exchange_check_coin_balance(INT8, INT4, BYTEA, BOOLEAN, BOOLEAN) - IS 'Checks whether the coin has sufficient balance for all the operations associated with it'; - - --- Complete transaction --- COMMIT; |