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Adding sign and verification for loan-opening

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This commit is contained in:
sairajzero 2023-07-21 05:24:17 +05:30
parent 5853b13c49
commit 8032aee802
1 changed files with 127 additions and 1 deletions
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128
scripts/btcMortgage.js
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@ -190,7 +190,133 @@
return details;
}
/*Loan taking*/
/*Signature and verification */
function sign_borrower(privKey, loan_amount, policy_id, coborrower, lender) {
let borrower_floID = floCrypto.toFloID(floDapps.user.id),
coborrower_floID = floCrypto.toFloID(coborrower),
lender_floID = floCrypto.toFloID(lender);
//validate values before signing
if (!floCrypto.verifyPrivKey(privKey, borrower_floID))
throw "Invalid Private key for borrower";
if (typeof loan_amount !== "number" || !VALUE_REGEX.test(loan_amount))
throw "Invalid loan amount";
if (!(policy_id in POLICIES))
throw "Invalid Policy";
if (!floCrypto.validateFloID(coborrower_floID, true))
throw "Invalid coborrower floID";
if (!floCrypto.validateFloID(lender_floID, true))
throw "Invalid lender floID";
//sign the value-data
let timestamp = Date.now();
let doc_array = [timestamp, borrower_floID, coborrower_floID, lender_floID, loan_amount, policy_id];
let sign_part = floCrypto.signData(doc_array.join("|"));
let pubKey = floCrypto.getPubKeyHex(privKey);
let borrower_sign = [pubKey, sign_part, timestamp].join(".")
return borrower_sign;
}
function verify_borrowerSign(borrower_sign, borrower, loan_amount, policy_id, coborrower, lender) {
//split the signature part
let sign_splits = borrower_sign.split('.');
let borrower_pubKey = sign_splits[0],
sign_part = sign_splits[1],
timestamp = sign_splits[2];
let borrower_floID = floCrypto.getFloID(borrower_pubKey),
coborrower_floID = floCrypto.toFloID(coborrower),
lender_floID = floCrypto.toFloID(lender);
//validate values
if (!floCrypto.verifyPubKey(borrower_pubKey, borrower))
throw "Invalid public key";
if (typeof loan_amount !== "number" || !VALUE_REGEX.test(loan_amount))
throw "Invalid loan amount";
if (!(policy_id in POLICIES))
throw "Invalid Policy";
if (!floCrypto.validateFloID(borrower_floID, true))
throw "Invalid borrower floID";
if (!floCrypto.validateFloID(coborrower_floID, true))
throw "Invalid coborrower floID";
if (!floCrypto.validateFloID(lender_floID, true))
throw "Invalid lender floID";
//verify the signature
let doc_array = [timestamp, borrower_floID, coborrower_floID, lender_floID, loan_amount, policy_id];
if (floCrypto.verifySign(doc_array.join("|"), sign_part, borrower_pubKey))
return timestamp;
else return false;
}
function sign_coborrower(privKey, borrower_sign, collateral_value, collateral_lock_id) {
let coborrower_floID = floCrypto.toFloID(floDapps.user.id);
//validate values before signing
if (!floCrypto.verifyPrivKey(privKey, coborrower_floID))
throw "Invalid Private key for coborrower";
if (typeof collateral_value !== "number" || !VALUE_REGEX.test(collateral_value))
throw "Invalid collateral amount";
if (typeof collateral_lock_id !== 'string' || !TXID_REGEX.test(collateral_lock_id))
throw "Invalid collateral lock id";
//sign the value-data
let timestamp = Date.now();
let doc_array = [timestamp, borrower_sign, collateral_value, collateral_lock_id];
let sign_part = floCrypto.signData(doc_array.join("|"));
let pubKey = floCrypto.getPubKeyHex(privKey);
let coborrower_sign = [pubKey, sign_part, timestamp].join(".")
return coborrower_sign;
}
function verify_coborrowerSign(coborrower_sign, coborrower, borrower_sign, collateral_value, collateral_lock_id) {
//split the signature part
let sign_splits = coborrower_sign.split('.');
let coborrower_pubKey = sign_splits[0],
sign_part = sign_splits[1],
timestamp = sign_splits[2];
//validate values
if (!floCrypto.verifyPubKey(coborrower_pubKey, coborrower))
throw "Invalid public key";
if (typeof collateral_value !== "number" || !VALUE_REGEX.test(collateral_value))
throw "Invalid collateral amount";
if (typeof collateral_lock_id !== 'string' || !TXID_REGEX.test(collateral_lock_id))
throw "Invalid collateral lock id";
//verify the signature
let doc_array = [timestamp, borrower_sign, collateral_value, collateral_lock_id];
if (floCrypto.verifySign(doc_array.join("|"), sign_part, coborrower_pubKey))
return timestamp;
else return false;
}
function sign_lender(privKey, coborrower_sign, loan_transfer_id) {
let lender_floID = floCrypto.toFloID(floDapps.user.id);
//validate values before signing
if (!floCrypto.verifyPrivKey(privKey, lender_floID))
throw "Invalid Private key for lender";
if (typeof loan_transfer_id !== 'string' || !TXID_REGEX.test(loan_transfer_id))
throw "Invalid token transfer id";
//sign the value-data
let timestamp = Date.now();
let doc_array = [timestamp, coborrower_sign, loan_transfer_id];
let sign_part = floCrypto.signData(doc_array.join("|"));
let pubKey = floCrypto.getPubKeyHex(privKey);
let lender_sign = [pubKey, sign_part, timestamp].join(".")
return lender_sign;
}
function verify_lenderSign(lender_sign, lender, coborrower_sign, loan_transfer_id) {
//split the signature part
let sign_splits = lender_sign.split('.');
let lender_pubKey = sign_splits[0],
sign_part = sign_splits[1],
timestamp = sign_splits[2];
//validate values
if (!floCrypto.verifyPubKey(lender_pubKey, lender))
throw "Invalid public key";
if (typeof loan_transfer_id !== 'string' || !TXID_REGEX.test(loan_transfer_id))
throw "Invalid token transfer id";
//verify the signature
let doc_array = [timestamp, coborrower_sign, loan_transfer_id];
if (floCrypto.verifySign(doc_array.join("|"), sign_part, lender_pubKey))
return timestamp;
else return false;
}
/*Loan Opening*/
//1. B: requests collateral from coborrower
btcMortgage.requestLoanCollateral = function (loan_amount, policy_id, coborrower) {