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Audit Transaction

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Store the following values upon successful transaction
- Timestamp
- Quanity, unit value, total cost
- Old/New Balance of Rupee and FLO for both seller and buyer
This commit is contained in:
sairajzero 2021-12-06 22:13:37 +05:30
parent 946087481a
commit f1e9658007
2 changed files with 68 additions and 7 deletions
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19
args/schema.sql
View File

@ -137,6 +137,25 @@ CREATE TABLE priceHistory (
rec_time DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE auditTransaction(
rec_time DATETIME DEFAULT CURRENT_TIMESTAMP,
unit_price FLOAT NOT NULL,
quantity FLOAT NOT NULL,
total_cost FLOAT NOT NULL,
sellerID CHAR(34) NOT NULL,
FLO_seller_old FLOAT NOT NULL,
FLO_seller_new FLOAT NOT NULL,
Rupee_seller_old FLOAT NOT NULL,
Rupee_seller_new FLOAT NOT NULL,
buyerID CHAR(34) NOT NULL,
FLO_buyer_old FLOAT NOT NULL,
FLO_buyer_new FLOAT NOT NULL,
Rupee_buyer_old FLOAT NOT NULL,
Rupee_buyer_new FLOAT NOT NULL,
FOREIGN KEY (sellerID) REFERENCES Users(floID),
FOREIGN KEY (buyerID) REFERENCES Users(floID)
);
/* Backup feature (Table and Triggers) */
CREATE TABLE _backup (

56
src/coupling.js
View File

@ -25,13 +25,17 @@ function processCoupling(bestPairQueue) {
clear_sell = spend_result.incomplete && !spend_result.flag_baseNull; //clear_sell can be true only if an order is placed without enough FLO
processOrders(seller_best, buyer_best, txQueries, tx_quantity, clear_sell);
updateBalance(seller_best, buyer_best, txQueries, bestPairQueue.cur_rate, tx_quantity);
//process txn query in SQL
DB.transaction(txQueries).then(_ => {
bestPairQueue.next(tx_quantity, spend_result.incomplete, spend_result.flag_baseNull);
console.log(`Transaction was successful! BuyOrder:${buyer_best.id}| SellOrder:${seller_best.id}`);
price.updateLastTime();
//Since a tx was successful, match again
processCoupling(bestPairQueue);
//begin audit
beginAudit(seller_best.floID, buyer_best.floID, bestPairQueue.cur_rate, tx_quantity).then(audit => {
//process txn query in SQL
DB.transaction(txQueries).then(_ => {
bestPairQueue.next(tx_quantity, spend_result.incomplete, spend_result.flag_baseNull);
console.log(`Transaction was successful! BuyOrder:${buyer_best.id}| SellOrder:${seller_best.id}`);
audit.end();
price.updateLastTime();
//Since a tx was successful, match again
processCoupling(bestPairQueue);
}).catch(error => console.error(error));
}).catch(error => console.error(error));
}).catch(error => console.error(error));
}).catch(error => {
@ -111,6 +115,44 @@ function updateBalance(seller_best, buyer_best, txQueries, cur_price, quantity)
txQueries.push(["INSERT INTO Transactions (seller, buyer, quantity, unitValue) VALUES (?, ?, ?, ?)", [seller_best.floID, buyer_best.floID, quantity, cur_price]]);
}
function beginAudit(sellerID, buyerID, unit_price, quantity) {
return new Promise((resolve, reject) => {
auditBalance(sellerID, buyerID).then(old_bal => resolve({
end: () => endAudit(sellerID, buyerID, old_bal, unit_price, quantity)
})).catch(error => reject(error))
})
}
function endAudit(sellerID, buyerID, old_bal, unit_price, quantity) {
auditBalance(sellerID, buyerID).then(new_bal => {
DB.query("INSERT INTO auditTransaction (sellerID, buyerID, quantity, unit_price, total_cost, " +
" Rupee_seller_old, Rupee_seller_new, Rupee_buyer_old, Rupee_buyer_new," +
" FLO_seller_old, FLO_seller_new, FLO_buyer_old, FLO_buyer_new) " +
" Value (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)", [sellerID, buyerID, quantity, unit_price, quantity * unit_price,
old_bal[sellerID].Rupee, new_bal[sellerID].Rupee, old_bal[buyerID].Rupee, new_bal[buyerID].Rupee,
old_bal[sellerID].FLO, new_bal[sellerID].FLO, old_bal[buyerID].FLO, new_bal[buyerID].FLO,
]).then(_ => null).catch(error => console.error(error))
}).catch(error => console.error(error));
}
function auditBalance(sellerID, buyerID) {
return new Promise((resolve, reject) => {
let balance = {
[sellerID]: {},
[buyerID]: {}
};
DB.query("SELECT floID, rupeeBalance FROM Cash WHERE floID IN (?, ?)", [sellerID, buyerID]).then(result => {
for (let i in result)
balance[result[i].floID].Rupee = result[i].rupeeBalance;
DB.query("SELECT floID, SUM(quantity) as floBal FROM Vault WHERE floID IN (?, ?) GROUP BY floID", [sellerID, buyerID]).then(result => {
for (let i in result)
balance[result[i].floID].FLO = result[i].floBal;
resolve(balance);
}).catch(error => reject(error))
}).catch(error => reject(error))
})
}
module.exports = {
initiate,
group,