RanchiMall/btcmortgage
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Adding fail safe to loan transfer

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fail-safe helps when the loan amount is transfered by details are not added to blockchain. this fail-safe can later be retried to write in blockchain
This commit is contained in:
sairajzero 2023-08-01 22:19:06 +05:30
parent 95c38ce512
commit f202dd7b79
1 changed files with 23 additions and 7 deletions
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30
scripts/btcMortgage.js
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@ -186,7 +186,7 @@
function initDB() {
return new Promise((resolve, reject) => {
let obs = { lastTx: {}, policies: {}, loans: {}, outbox: {}, inbox: {}, owned_collateral_locks: {} }
let obs = { lastTx: {}, policies: {}, loans: {}, outbox: {}, inbox: {}, owned_collateral_locks: {}, fail_safe: {} }
compactIDB.initDB(util.USER_DB, obs).then(result => {
compactIDB.setDefaultDB(util.USER_DB);
resolve(APP_IDENTIFIER + " user DB initiated");
@ -1084,6 +1084,9 @@
let borrower_floID = floCrypto.toFloID(borrower);
let transfer_appendix = stringifyLoanTransferData(borrower_sign, coborrower_sign);
floTokenAPI.sendToken(privKey, loan_amount, borrower_floID, "as loan|" + transfer_appendix, CURRENCY).then(token_txid => {
//add the collateral lock to owned list
owned_collateral_locks[collateral_lock_id] = token_txid;
compactIDB.addData("owned_collateral_locks", token_txid, collateral_lock_id);
//construct the blockchain data
let lender_sign = sign_lender(privKey, coborrower_sign, token_txid);
let loan_blockchain_data = stringifyLoanOpenData(
@ -1093,18 +1096,31 @@
);
let receivers = [borrower, coborrower].map(addr => floCrypto.toFloID(addr));
//write loan details in blockchain
floBlockchainAPI.writeDataMultiple([privKey], loan_blockchain_data, receivers).then(loan_txid => {
//add the collateral lock to owned list
owned_collateral_locks[collateral_lock_id] = loan_txid;
compactIDB.addData("owned_collateral_locks", loan_txid, collateral_lock_id);
resolve(loan_txid);
}).catch(error => reject(error))
floBlockchainAPI.writeDataMultiple([privKey], loan_blockchain_data, receivers)
.then(loan_txid => resolve(loan_txid))
.catch(error => {
compactIDB.writeData("fail_safe", loan_blockchain_data, token_txid); //fail-safe mech if token is transfered but details not added to blockchain. this helps to retry fail-safe
reject({ error, fail_safe: token_txid })
})
}).catch(error => reject(error))
}).catch(error => reject(error))
})
}
btcOperator.retryFailSafe = function (fail_safe_id) {
return new Promise((resolve, reject) => {
compactIDB.readData("fail_safe", fail_safe_id).then(fail_safe_data => {
let { borrower, coborrower } = parseLoanOpenData(fail_safe_data);
let receivers = [borrower, coborrower].map(addr => floCrypto.toFloID(addr));
floBlockchainAPI.writeDataMultiple([privKey], loan_blockchain_data, receivers).then(loan_txid => {
compactIDB.removeData("fail_safe", fail_safe_id); //remove fail safe as data is added to blockchain
resolve(loan_txid)
}).catch(error => reject(error))
}).catch(error => reject(error))
})
}
/*Loan Closing*/
//1. B: sends amount (PA + interest) to L (via USD tokens)