114 lines
3.6 KiB
JavaScript
114 lines
3.6 KiB
JavaScript
(function (EXPORTS) {
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const btcMortgage = EXPORTS;
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//USERS: B: Borrower, L: Lender, C: Collateral provider, T: Trusted banker (us)
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var BankerPubKey = "0257a9c47462fe89b159daa204ddb964c9b098a020641cc8090a9cad4f6dd2172a";
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const CURRENCY = "USD";
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const PERIOD_REGEX = /^\d{1,5}(Y|M|D)$/,
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TXID_REGEX = /^[0-9a-f]{64}$/i,
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VALUE_REGEX = /^\d+(.\d{1,8})?$/;
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const POLICIES = {}
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const toFixedDecimal = value => parseFloat((value).toFixed(8));
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function encodePeriod(str) {
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if (typeof str != 'string')
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throw "passed value must be string";
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if (PERIOD_REGEX.test(str)) //already in format
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return str;
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let P = '', n = 0;
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str.toLowerCase().replace(/,/g, '').split(" ").forEach(s => {
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if (!isNaN(s))
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n = parseInt(s);
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else switch (s) {
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case "year(s)": case "year": case "years": P += (n + 'Y'); n = 0; break;
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case "month(s)": case "month": case "months": P += (n + 'M'); n = 0; break;
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case "day(s)": case "day": case "days": P += (n + 'D'); n = 0; break;
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}
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});
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if (!PERIOD_REGEX.test(P)) {//not in format: something wrong
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console.error(`encodePeriod('${str}') failed`, P)
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throw "Invalid period";
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}
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return P;
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}
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function decodePeriod(str) {
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if (typeof str != 'string')
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throw "passed value must be string";
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else if (!PERIOD_REGEX.test(str)) //not in format
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throw "Invalid period";
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let n = parseInt(str);
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let v = str[str.length - 1];
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switch (v) {
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case 'Y': return n + (n == 1 ? "year" : "years");
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case 'M': return n + (n == 1 ? "month" : "months");
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case "D": return n + (n == 1 ? "day" : "days");
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}
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}
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const dateFormat = (date = null) => {
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let d = (date ? new Date(date) : new Date()).toDateString();
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return [d.substring(8, 10), d.substring(4, 7), d.substring(11, 15)].join(" ");
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}
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const yearDiff = (d1 = null, d2 = null) => {
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d1 = d1 ? new Date(d1) : new Date();
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d2 = d2 ? new Date(d2) : new Date();
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let y = d1.getYear() - d2.getYear(),
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m = d1.getMonth() - d2.getMonth(),
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d = d1.getDate() - d2.getDate()
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return y + m / 12 + d / 365;
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}
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const dateAdder = function (start_date, duration) {
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let date = new Date(start_date);
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let y = parseInt(duration.match(/\d+Y/)),
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m = parseInt(duration.match(/\d+M/)),
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d = parseInt(duration.match(/\d+D/));
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if (!isNaN(y))
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date.setFullYear(date.getFullYear() + y);
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if (!isNaN(m))
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date.setMonth(date.getMonth() + m);
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if (!isNaN(d))
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date.setDate(date.getDate() + d);
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return date;
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}
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function calcAllowedLoan(collateralQuantity, security_percent) {
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return collateralQuantity * security_percent;
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}
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function calcRequiredCollateral(loanEquivalent, security_percent) {
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let inverse_security_percent = 1 / security_percent;
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return loanEquivalent * inverse_security_percent;
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}
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function findLocker(coborrower_pubKey, lender_pubKey) {
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return btcOperator.multiSigAddress([coborrower_pubKey, lender_pubKey, BankerPubKey], 2);
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}
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function extractPubKeyFromSign(sign) {
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return sign.split('.')[0];
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}
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btcMortgage.util = {
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toFixedDecimal,
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encodePeriod, decodePeriod,
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calcAllowedLoan, calcRequiredCollateral,
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findLocker, extractPubKeyFromSign
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}
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})(window.btcMortgage = {}) |