Adding bonds module

- Added bond closing update
- Added exchangeAPI module

scripts/bonds.js

@@ -0,0 +1,217 @@
+const blockchainBond = (function () {
+    const productStr = "Product: RanchiMall Bitcoin Bond";
+
+    const magnitude = m => {
+        switch (m) {
+            case "thousand": return 1000;
+            case "lakh": case "lakhs": return 100000;
+            case "million": return 1000000;
+            case "crore": case "crores": return 10000000;
+            default: return null;
+        }
+    }
+    const parseNumber = (str) => {
+        let n = 0,
+            g = 0;
+        str.toLowerCase().replace(/,/g, '').split(" ").forEach(s => {
+            if (!isNaN(s))
+                g = parseFloat(s);
+            else {
+                let m = magnitude(s);
+                if (m !== null) {
+                    n += m * g;
+                    g = 0;
+                }
+            }
+        });
+        return n + g;
+    }
+    const parsePeriod = (str) => {
+        let P = '', n = 0;
+        str.toLowerCase().replace(/,/g, '').split(" ").forEach(s => {
+            if (!isNaN(s))
+                n = parseFloat(s);
+            else switch (s) {
+                case "year(s)": case "year": case "years": P += (n + 'Y'); n = 0; break;
+                case "month(s)": case "month": case "months": P += (n + 'M'); n = 0; break;
+                case "day(s)": case "day": case "days": P += (n + 'D'); n = 0; break;
+            }
+        });
+        return P;
+    }
+    const dateFormat = (date = null) => {
+        let d = (date ? new Date(date) : new Date()).toDateString();
+        return [d.substring(8, 10), d.substring(4, 7), d.substring(11, 15)].join(" ");
+    }
+    const yearDiff = (d1 = null, d2 = null) => {
+        d1 = d1 ? new Date(d1) : new Date();
+        d2 = d2 ? new Date(d2) : new Date();
+        let y = d1.getYear() - d2.getYear(),
+            m = d1.getMonth() - d2.getMonth(),
+            d = d1.getDate() - d2.getDate()
+        return y + m / 12 + d / 365;
+    }
+
+    const dateAdder = function (start_date, duration) {
+        let date = new Date(start_date);
+        let y = parseInt(duration.match(/\d+Y/)),
+            m = parseInt(duration.match(/\d+M/)),
+            d = parseInt(duration.match(/\d+D/));
+        if (!isNaN(y))
+            date.setFullYear(date.getFullYear() + y);
+        if (!isNaN(m))
+            date.setMonth(date.getMonth() + m);
+        if (!isNaN(d))
+            date.setDate(date.getDate() + d);
+        return date;
+    }
+
+    function calcNetValue(BTC_base, BTC_net, startDate, minIpa, maxPeriod, cut, amount, USD_base, USD_net) {
+        let gain, duration, interest, net;
+        gain = (BTC_net - BTC_base) / BTC_base;
+        duration = yearDiff(Math.min(Date.now(), dateAdder(startDate, maxPeriod).getTime()), startDate);
+        interest = Math.max(cut * gain, minIpa * duration);
+        net = amount / USD_base;
+        net += net * interest;
+        return net * USD_net;
+    }
+
+    function stringify_main(BTC_base, start_date, guaranteed_interest, guarantee_period, gain_cut, amount, USD_base, lockin_period, floID) {
+        return [
+            `${productStr}`,
+            `Base value: ${BTC_base} USD`,
+            `Date of bond start: ${dateFormat(start_date)}`,
+            `Guaranteed interest: ${guaranteed_interest}% per annum simple for ${guarantee_period}`,
+            `Bond value: guaranteed interest or ${gain_cut}% of the gains whichever is higher`,
+            `Amount invested: Rs ${amount}`,
+            `USD INR rate at start: ${USD_base}`,
+            `Lockin period: ${lockin_period}`,
+            `FLO ID of Bond Holder: ${floID}`
+        ].join("|");
+    }
+
+    function parse_main(data) {
+        //Data (add bond) sent by admin 
+        let details = {};
+        data.split("|").forEach(d => {
+            d = d.split(': ');
+            switch (d[0].toLowerCase()) {
+                case "base value":
+                    details["BTC_base"] = parseNumber(d[1].slice(0, -4)); break;
+                case "date of bond start":
+                    details["startDate"] = new Date(d[1]); break;
+                case "guaranteed interest":
+                    details["minIpa"] = parseFloat(d[1].match(/\d+%/)) / 100;
+                    details["maxPeriod"] = parsePeriod(d[1].match(/for .+/).toString()); break;
+                case "bond value":
+                    details["cut"] = parseFloat(d[1].match(/\d+%/)) / 100; break;
+                case "amount invested":
+                    details["amount"] = parseNumber(d[1].substring(3)); break;
+                case "usd inr rate at start":
+                    details["USD_base"] = parseFloat(d[1]); break;
+                case "lockin period":
+                    details["lockinPeriod"] = parsePeriod(d[1]); break;
+                case "flo id of bond holder":
+                    details["floID"] = d[1]; break;
+            }
+        });
+        return details;
+    }
+
+    function stringify_end(bond_id, end_date, BTC_net, USD_net, amount, ref_sign, payment_ref) {
+        return [
+            `${productStr}`,
+            `Bond: ${bond_id}`,
+            `End value: ${BTC_net} USD`,
+            `Date of bond end: ${dateFormat(end_date)}`,
+            `USD INR rate at end: ${USD_net}`,
+            `Amount withdrawn: Rs ${amount} via ${payment_ref}`,
+            `Reference: ${ref_sign}`
+        ].join("|");
+    }
+
+    function parse_end(data) {
+        //Data (end bond) send by market nodes
+        let details = {};
+        data.split("|").forEach(d => {
+            d = d.split(': ');
+            switch (d[0].toLowerCase()) {
+                case "bond":
+                    details["bondID"] = d[1]; break;
+                case "end value":
+                    details["BTC_net"] = parseNumber(d[1].slice(0, -4)); break;
+                case "date of bond end":
+                    details["endDate"] = new Date(d[1]); break;
+                case "amount withdrawn":
+                    details["amountFinal"] = parseNumber(d[1].match(/\d.+ via/).toString());
+                    details["payment_refRef"] = d[1].match(/via .+/).toString().substring(4); break;
+                case "usd inr rate at end":
+                    details["USD_net"] = parseFloat(d[1]); break;
+                case "reference":
+                    details["refSign"] = d[1]; break;
+            }
+        });
+        return details;
+    }
+
+    return {
+        productStr,
+        dateAdder,
+        dateFormat,
+        calcNetValue,
+        parse: {
+            main: parse_main,
+            end: parse_end
+        },
+        stringify: {
+            main: stringify_main,
+            end: stringify_end
+        }
+    }
+})();
+
+function refreshBlockchainData() {
+    return new Promise((resolve, reject) => {
+        compactIDB.readData("appendix", "lastTx" + floGlobals.adminID).then(lastTx => {
+            floBlockchainAPI.readData(floGlobals.adminID, {
+                ignoreOld: lastTx,
+                senders: floExchangeAPI.nodeList.concat(floGlobals.adminID), //sentOnly: true,
+                tx: true,
+                filter: d => d.startsWith(blockchainBond.productStr)
+            }).then(result => {
+                result.data.reverse().forEach(d => {
+                    if (d.senders.has(floGlobals.adminID) && /bond start/i.test(d.data))
+                        compactIDB.addData('bonds', d.data, d.txid);
+                    else
+                        compactIDB.addData('closings', d.data, d.txid);
+                });
+                compactIDB.writeData('appendix', result.totalTxs, "lastTx" + floGlobals.adminID);
+                resolve(true);
+            }).catch(error => reject(error))
+        }).catch(error => reject(error))
+    })
+}
+
+function getCurrentRates() {
+    let fetchData = api => new Promise((resolve, reject) => {
+        fetch(api).then(response => {
+            if (response.ok)
+                response.json().then(data => resolve(data))
+            else
+                reject(response)
+        }).catch(error => reject(error))
+    })
+    return new Promise((resolve, reject) => {
+        fetchData(`https://bitpay.com/api/rates`).then(result => {
+            let BTC_USD, BTC_INR, USD_INR
+            for (let i of result)
+                i.code == "USD" ? BTC_USD = i.rate : i.code == "INR" ? BTC_INR = i.rate : null;
+            USD_INR = BTC_INR / BTC_USD;
+            resolve({
+                BTC_USD,
+                BTC_INR,
+                USD_INR
+            })
+        }).catch(error => reject(error))
+    })
+}