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dist/konami-card.d.ts

@@ -0,0 +1,12 @@
+/// <reference types="node" />
+declare module 'crypto' {
+    function getRandomValues(buf: Array<number> | Uint8Array | Buffer): Uint8Array;
+}
+export declare const encode: (nfcId: string) => Promise<unknown>;
+export declare const decode: (cardId: string) => Promise<unknown>;
+declare const _default: {
+    encode: (nfcId: string) => Promise<unknown>;
+    decode: (cardId: string) => Promise<unknown>;
+};
+export default _default;
+//# sourceMappingURL=konami-card.d.ts.map

dist/konami-card.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"konami-card.d.ts","sourceRoot":"","sources":["../src/konami-card.ts"],"names":[],"mappings":";AAEA,OAAO,QAAQ,QAAQ,CAAC;IACtB,SAAS,eAAe,CAAC,GAAG,EAAE,KAAK,CAAC,MAAM,CAAC,GAAG,UAAU,GAAG,MAAM,GAAG,UAAU,CAAC;CAChF;AAmBD,eAAO,MAAM,MAAM,qCAOlB,CAAC;AAEF,eAAO,MAAM,MAAM,sCAOlB,CAAC;;;;;AAEF,wBAAkC"}

dist/konami-card.js

@@ -0,0 +1,38 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+const crypto_1 = __importDefault(require("crypto"));
+crypto_1.default['getRandomValues'] = (buf) => {
+    buf = Buffer.from(buf);
+    let bytes = crypto_1.default.randomBytes(buf.length);
+    buf.set(bytes);
+    return buf;
+};
+require('./wasm_exec');
+//@ts-ignore
+const go = new Go();
+const path = require('path').join(__dirname, 'konami-card.wasm');
+const bytes = require('fs').readFileSync(path);
+const wasmModule = new WebAssembly.Module(bytes);
+const wasmInstance = new WebAssembly.Instance(wasmModule, go.importObject);
+go.run(wasmInstance).then();
+exports.encode = function (nfcId) {
+    return new Promise((resolve) => {
+        // @ts-ignore
+        KONAMI_CARD_ENCODE(nfcId, function (result) {
+            resolve(result);
+        });
+    });
+};
+exports.decode = function (cardId) {
+    return new Promise((resolve) => {
+        // @ts-ignore
+        KONAMI_CARD_DECODE(cardId, function (result) {
+            resolve(result);
+        });
+    });
+};
+exports.default = { encode: exports.encode, decode: exports.decode };
+//# sourceMappingURL=konami-card.js.map

dist/konami-card.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"konami-card.js","sourceRoot":"","sources":["../src/konami-card.ts"],"names":[],"mappings":";;;;;AAAA,oDAA4B;AAM5B,gBAAM,CAAC,iBAAiB,CAAC,GAAG,CAAC,GAAwC,EAAc,EAAE;IACnF,GAAG,GAAG,MAAM,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;IACvB,IAAI,KAAK,GAAG,gBAAM,CAAC,WAAW,CAAC,GAAG,CAAC,MAAM,CAAC,CAAC;IAC3C,GAAG,CAAC,GAAG,CAAC,KAAK,CAAC,CAAC;IACf,OAAO,GAAG,CAAC;AACb,CAAC,CAAC;AAEF,OAAO,CAAC,aAAa,CAAC,CAAC;AAEvB,YAAY;AACZ,MAAM,EAAE,GAAG,IAAI,EAAE,EAAE,CAAC;AACpB,MAAM,IAAI,GAAG,OAAO,CAAC,MAAM,CAAC,CAAC,IAAI,CAAC,SAAS,EAAE,kBAAkB,CAAC,CAAC;AACjE,MAAM,KAAK,GAAG,OAAO,CAAC,IAAI,CAAC,CAAC,YAAY,CAAC,IAAI,CAAC,CAAC;AAC/C,MAAM,UAAU,GAAG,IAAI,WAAW,CAAC,MAAM,CAAC,KAAK,CAAC,CAAC;AACjD,MAAM,YAAY,GAAG,IAAI,WAAW,CAAC,QAAQ,CAAC,UAAU,EAAE,EAAE,CAAC,YAAY,CAAC,CAAC;AAC3E,EAAE,CAAC,GAAG,CAAC,YAAY,CAAC,CAAC,IAAI,EAAE,CAAC;AAEf,QAAA,MAAM,GAAG,UAAS,KAAa;IAC1C,OAAO,IAAI,OAAO,CAAC,CAAC,OAAO,EAAE,EAAE;QAC7B,aAAa;QACb,kBAAkB,CAAC,KAAK,EAAE,UAAS,MAAc;YAC/C,OAAO,CAAC,MAAM,CAAC,CAAC;QAClB,CAAC,CAAC,CAAC;IACL,CAAC,CAAC,CAAC;AACL,CAAC,CAAC;AAEW,QAAA,MAAM,GAAG,UAAS,MAAc;IAC3C,OAAO,IAAI,OAAO,CAAC,CAAC,OAAO,EAAE,EAAE;QAC7B,aAAa;QACb,kBAAkB,CAAC,MAAM,EAAE,UAAS,MAAc;YAChD,OAAO,CAAC,MAAM,CAAC,CAAC;QAClB,CAAC,CAAC,CAAC;IACL,CAAC,CAAC,CAAC;AACL,CAAC,CAAC;AAEF,kBAAe,EAAE,MAAM,EAAN,cAAM,EAAE,MAAM,EAAN,cAAM,EAAE,CAAC"}

dist/wasm_exec.d.ts

@@ -0,0 +1,2 @@
+export {};
+//# sourceMappingURL=wasm_exec.d.ts.map

dist/wasm_exec.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"wasm_exec.d.ts","sourceRoot":"","sources":["../src/wasm_exec.js"],"names":[],"mappings":""}

dist/wasm_exec.js

@@ -0,0 +1,616 @@
+"use strict";
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+(() => {
+    // Map multiple JavaScript environments to a single common API,
+    // preferring web standards over Node.js API.
+    //
+    // Environments considered:
+    // - Browsers
+    // - Node.js
+    // - Electron
+    // - Parcel
+    if (typeof global !== 'undefined') {
+        // global already exists
+    }
+    else if (typeof window !== 'undefined') {
+        window.global = window;
+    }
+    else if (typeof self !== 'undefined') {
+        self.global = self;
+    }
+    else {
+        throw new Error('cannot export Go (neither global, window nor self is defined)');
+    }
+    if (!global.require && typeof require !== 'undefined') {
+        global.require = require;
+    }
+    if (!global.fs && global.require) {
+        global.fs = require('fs');
+    }
+    const enosys = () => {
+        const err = new Error('not implemented');
+        err.code = 'ENOSYS';
+        return err;
+    };
+    if (!global.fs) {
+        let outputBuf = '';
+        global.fs = {
+            constants: {
+                O_WRONLY: -1,
+                O_RDWR: -1,
+                O_CREAT: -1,
+                O_TRUNC: -1,
+                O_APPEND: -1,
+                O_EXCL: -1,
+            },
+            writeSync(fd, buf) {
+                outputBuf += decoder.decode(buf);
+                const nl = outputBuf.lastIndexOf('\n');
+                if (nl !== -1) {
+                    console.log(outputBuf.substr(0, nl));
+                    outputBuf = outputBuf.substr(nl + 1);
+                }
+                return buf.length;
+            },
+            write(fd, buf, offset, length, position, callback) {
+                if (offset !== 0 || length !== buf.length || position !== null) {
+                    callback(enosys());
+                    return;
+                }
+                const n = this.writeSync(fd, buf);
+                callback(null, n);
+            },
+            chmod(path, mode, callback) {
+                callback(enosys());
+            },
+            chown(path, uid, gid, callback) {
+                callback(enosys());
+            },
+            close(fd, callback) {
+                callback(enosys());
+            },
+            fchmod(fd, mode, callback) {
+                callback(enosys());
+            },
+            fchown(fd, uid, gid, callback) {
+                callback(enosys());
+            },
+            fstat(fd, callback) {
+                callback(enosys());
+            },
+            fsync(fd, callback) {
+                callback(null);
+            },
+            ftruncate(fd, length, callback) {
+                callback(enosys());
+            },
+            lchown(path, uid, gid, callback) {
+                callback(enosys());
+            },
+            link(path, link, callback) {
+                callback(enosys());
+            },
+            lstat(path, callback) {
+                callback(enosys());
+            },
+            mkdir(path, perm, callback) {
+                callback(enosys());
+            },
+            open(path, flags, mode, callback) {
+                callback(enosys());
+            },
+            read(fd, buffer, offset, length, position, callback) {
+                callback(enosys());
+            },
+            readdir(path, callback) {
+                callback(enosys());
+            },
+            readlink(path, callback) {
+                callback(enosys());
+            },
+            rename(from, to, callback) {
+                callback(enosys());
+            },
+            rmdir(path, callback) {
+                callback(enosys());
+            },
+            stat(path, callback) {
+                callback(enosys());
+            },
+            symlink(path, link, callback) {
+                callback(enosys());
+            },
+            truncate(path, length, callback) {
+                callback(enosys());
+            },
+            unlink(path, callback) {
+                callback(enosys());
+            },
+            utimes(path, atime, mtime, callback) {
+                callback(enosys());
+            },
+        };
+    }
+    if (!global.process) {
+        global.process = {
+            getuid() {
+                return -1;
+            },
+            getgid() {
+                return -1;
+            },
+            geteuid() {
+                return -1;
+            },
+            getegid() {
+                return -1;
+            },
+            getgroups() {
+                throw enosys();
+            },
+            pid: -1,
+            ppid: -1,
+            umask() {
+                throw enosys();
+            },
+            cwd() {
+                throw enosys();
+            },
+            chdir() {
+                throw enosys();
+            },
+        };
+    }
+    if (!global.crypto) {
+        const nodeCrypto = require('crypto');
+        global.crypto = {
+            getRandomValues(b) {
+                nodeCrypto.randomFillSync(b);
+            },
+        };
+    }
+    if (!global.performance) {
+        global.performance = {
+            now() {
+                const [sec, nsec] = process.hrtime();
+                return sec * 1000 + nsec / 1000000;
+            },
+        };
+    }
+    if (!global.TextEncoder) {
+        global.TextEncoder = require('util').TextEncoder;
+    }
+    if (!global.TextDecoder) {
+        global.TextDecoder = require('util').TextDecoder;
+    }
+    // End of polyfills for common API.
+    const encoder = new TextEncoder('utf-8');
+    const decoder = new TextDecoder('utf-8');
+    global.Go = class {
+        constructor() {
+            this.argv = ['js'];
+            this.env = {};
+            this.exit = (code) => {
+                if (code !== 0) {
+                    console.warn('exit code:', code);
+                }
+            };
+            this._exitPromise = new Promise((resolve) => {
+                this._resolveExitPromise = resolve;
+            });
+            this._pendingEvent = null;
+            this._scheduledTimeouts = new Map();
+            this._nextCallbackTimeoutID = 1;
+            const setInt64 = (addr, v) => {
+                this.mem.setUint32(addr + 0, v, true);
+                this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
+            };
+            const getInt64 = (addr) => {
+                const low = this.mem.getUint32(addr + 0, true);
+                const high = this.mem.getInt32(addr + 4, true);
+                return low + high * 4294967296;
+            };
+            const loadValue = (addr) => {
+                const f = this.mem.getFloat64(addr, true);
+                if (f === 0) {
+                    return undefined;
+                }
+                if (!isNaN(f)) {
+                    return f;
+                }
+                const id = this.mem.getUint32(addr, true);
+                return this._values[id];
+            };
+            const storeValue = (addr, v) => {
+                const nanHead = 0x7ff80000;
+                if (typeof v === 'number') {
+                    if (isNaN(v)) {
+                        this.mem.setUint32(addr + 4, nanHead, true);
+                        this.mem.setUint32(addr, 0, true);
+                        return;
+                    }
+                    if (v === 0) {
+                        this.mem.setUint32(addr + 4, nanHead, true);
+                        this.mem.setUint32(addr, 1, true);
+                        return;
+                    }
+                    this.mem.setFloat64(addr, v, true);
+                    return;
+                }
+                switch (v) {
+                    case undefined:
+                        this.mem.setFloat64(addr, 0, true);
+                        return;
+                    case null:
+                        this.mem.setUint32(addr + 4, nanHead, true);
+                        this.mem.setUint32(addr, 2, true);
+                        return;
+                    case true:
+                        this.mem.setUint32(addr + 4, nanHead, true);
+                        this.mem.setUint32(addr, 3, true);
+                        return;
+                    case false:
+                        this.mem.setUint32(addr + 4, nanHead, true);
+                        this.mem.setUint32(addr, 4, true);
+                        return;
+                }
+                let id = this._ids.get(v);
+                if (id === undefined) {
+                    id = this._idPool.pop();
+                    if (id === undefined) {
+                        id = this._values.length;
+                    }
+                    this._values[id] = v;
+                    this._goRefCounts[id] = 0;
+                    this._ids.set(v, id);
+                }
+                this._goRefCounts[id]++;
+                let typeFlag = 1;
+                switch (typeof v) {
+                    case 'string':
+                        typeFlag = 2;
+                        break;
+                    case 'symbol':
+                        typeFlag = 3;
+                        break;
+                    case 'function':
+                        typeFlag = 4;
+                        break;
+                }
+                this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
+                this.mem.setUint32(addr, id, true);
+            };
+            const loadSlice = (addr) => {
+                const array = getInt64(addr + 0);
+                const len = getInt64(addr + 8);
+                return new Uint8Array(this._inst.exports.mem.buffer, array, len);
+            };
+            const loadSliceOfValues = (addr) => {
+                const array = getInt64(addr + 0);
+                const len = getInt64(addr + 8);
+                const a = new Array(len);
+                for (let i = 0; i < len; i++) {
+                    a[i] = loadValue(array + i * 8);
+                }
+                return a;
+            };
+            const loadString = (addr) => {
+                const saddr = getInt64(addr + 0);
+                const len = getInt64(addr + 8);
+                return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
+            };
+            const timeOrigin = Date.now() - performance.now();
+            this.importObject = {
+                go: {
+                    // Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
+                    // may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
+                    // function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
+                    // This changes the SP, thus we have to update the SP used by the imported function.
+                    // func wasmExit(code int32)
+                    'runtime.wasmExit': (sp) => {
+                        const code = this.mem.getInt32(sp + 8, true);
+                        this.exited = true;
+                        delete this._inst;
+                        delete this._values;
+                        delete this._goRefCounts;
+                        delete this._ids;
+                        delete this._idPool;
+                        this.exit(code);
+                    },
+                    // func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
+                    'runtime.wasmWrite': (sp) => {
+                        const fd = getInt64(sp + 8);
+                        const p = getInt64(sp + 16);
+                        const n = this.mem.getInt32(sp + 24, true);
+                        fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
+                    },
+                    // func resetMemoryDataView()
+                    'runtime.resetMemoryDataView': () => {
+                        this.mem = new DataView(this._inst.exports.mem.buffer);
+                    },
+                    // func nanotime1() int64
+                    'runtime.nanotime1': (sp) => {
+                        setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
+                    },
+                    // func walltime1() (sec int64, nsec int32)
+                    'runtime.walltime1': (sp) => {
+                        const msec = new Date().getTime();
+                        setInt64(sp + 8, msec / 1000);
+                        this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
+                    },
+                    // func scheduleTimeoutEvent(delay int64) int32
+                    'runtime.scheduleTimeoutEvent': (sp) => {
+                        const id = this._nextCallbackTimeoutID;
+                        this._nextCallbackTimeoutID++;
+                        this._scheduledTimeouts.set(id, setTimeout(() => {
+                            this._resume();
+                            while (this._scheduledTimeouts.has(id)) {
+                                // for some reason Go failed to register the timeout event, log and try again
+                                // (temporary workaround for https://github.com/golang/go/issues/28975)
+                                console.warn('scheduleTimeoutEvent: missed timeout event');
+                                this._resume();
+                            }
+                        }, getInt64(sp + 8) + 1 // setTimeout has been seen to fire up to 1 millisecond early
+                        ));
+                        this.mem.setInt32(sp + 16, id, true);
+                    },
+                    // func clearTimeoutEvent(id int32)
+                    'runtime.clearTimeoutEvent': (sp) => {
+                        const id = this.mem.getInt32(sp + 8, true);
+                        clearTimeout(this._scheduledTimeouts.get(id));
+                        this._scheduledTimeouts.delete(id);
+                    },
+                    // func getRandomData(r []byte)
+                    'runtime.getRandomData': (sp) => {
+                        crypto.getRandomValues(loadSlice(sp + 8));
+                    },
+                    // func finalizeRef(v ref)
+                    'syscall/js.finalizeRef': (sp) => {
+                        const id = this.mem.getUint32(sp + 8, true);
+                        this._goRefCounts[id]--;
+                        if (this._goRefCounts[id] === 0) {
+                            const v = this._values[id];
+                            this._values[id] = null;
+                            this._ids.delete(v);
+                            this._idPool.push(id);
+                        }
+                    },
+                    // func stringVal(value string) ref
+                    'syscall/js.stringVal': (sp) => {
+                        storeValue(sp + 24, loadString(sp + 8));
+                    },
+                    // func valueGet(v ref, p string) ref
+                    'syscall/js.valueGet': (sp) => {
+                        const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
+                        sp = this._inst.exports.getsp(); // see comment above
+                        storeValue(sp + 32, result);
+                    },
+                    // func valueSet(v ref, p string, x ref)
+                    'syscall/js.valueSet': (sp) => {
+                        Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
+                    },
+                    // func valueDelete(v ref, p string)
+                    'syscall/js.valueDelete': (sp) => {
+                        Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
+                    },
+                    // func valueIndex(v ref, i int) ref
+                    'syscall/js.valueIndex': (sp) => {
+                        storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
+                    },
+                    // valueSetIndex(v ref, i int, x ref)
+                    'syscall/js.valueSetIndex': (sp) => {
+                        Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
+                    },
+                    // func valueCall(v ref, m string, args []ref) (ref, bool)
+                    'syscall/js.valueCall': (sp) => {
+                        try {
+                            const v = loadValue(sp + 8);
+                            const m = Reflect.get(v, loadString(sp + 16));
+                            const args = loadSliceOfValues(sp + 32);
+                            const result = Reflect.apply(m, v, args);
+                            sp = this._inst.exports.getsp(); // see comment above
+                            storeValue(sp + 56, result);
+                            this.mem.setUint8(sp + 64, 1);
+                        }
+                        catch (err) {
+                            storeValue(sp + 56, err);
+                            this.mem.setUint8(sp + 64, 0);
+                        }
+                    },
+                    // func valueInvoke(v ref, args []ref) (ref, bool)
+                    'syscall/js.valueInvoke': (sp) => {
+                        try {
+                            const v = loadValue(sp + 8);
+                            const args = loadSliceOfValues(sp + 16);
+                            const result = Reflect.apply(v, undefined, args);
+                            sp = this._inst.exports.getsp(); // see comment above
+                            storeValue(sp + 40, result);
+                            this.mem.setUint8(sp + 48, 1);
+                        }
+                        catch (err) {
+                            storeValue(sp + 40, err);
+                            this.mem.setUint8(sp + 48, 0);
+                        }
+                    },
+                    // func valueNew(v ref, args []ref) (ref, bool)
+                    'syscall/js.valueNew': (sp) => {
+                        try {
+                            const v = loadValue(sp + 8);
+                            const args = loadSliceOfValues(sp + 16);
+                            const result = Reflect.construct(v, args);
+                            sp = this._inst.exports.getsp(); // see comment above
+                            storeValue(sp + 40, result);
+                            this.mem.setUint8(sp + 48, 1);
+                        }
+                        catch (err) {
+                            storeValue(sp + 40, err);
+                            this.mem.setUint8(sp + 48, 0);
+                        }
+                    },
+                    // func valueLength(v ref) int
+                    'syscall/js.valueLength': (sp) => {
+                        setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
+                    },
+                    // valuePrepareString(v ref) (ref, int)
+                    'syscall/js.valuePrepareString': (sp) => {
+                        const str = encoder.encode(String(loadValue(sp + 8)));
+                        storeValue(sp + 16, str);
+                        setInt64(sp + 24, str.length);
+                    },
+                    // valueLoadString(v ref, b []byte)
+                    'syscall/js.valueLoadString': (sp) => {
+                        const str = loadValue(sp + 8);
+                        loadSlice(sp + 16).set(str);
+                    },
+                    // func valueInstanceOf(v ref, t ref) bool
+                    'syscall/js.valueInstanceOf': (sp) => {
+                        this.mem.setUint8(sp + 24, loadValue(sp + 8) instanceof loadValue(sp + 16));
+                    },
+                    // func copyBytesToGo(dst []byte, src ref) (int, bool)
+                    'syscall/js.copyBytesToGo': (sp) => {
+                        const dst = loadSlice(sp + 8);
+                        const src = loadValue(sp + 32);
+                        if (!(src instanceof Uint8Array)) {
+                            this.mem.setUint8(sp + 48, 0);
+                            return;
+                        }
+                        const toCopy = src.subarray(0, dst.length);
+                        dst.set(toCopy);
+                        setInt64(sp + 40, toCopy.length);
+                        this.mem.setUint8(sp + 48, 1);
+                    },
+                    // func copyBytesToJS(dst ref, src []byte) (int, bool)
+                    'syscall/js.copyBytesToJS': (sp) => {
+                        const dst = loadValue(sp + 8);
+                        const src = loadSlice(sp + 16);
+                        if (!(dst instanceof Uint8Array)) {
+                            this.mem.setUint8(sp + 48, 0);
+                            return;
+                        }
+                        const toCopy = src.subarray(0, dst.length);
+                        dst.set(toCopy);
+                        setInt64(sp + 40, toCopy.length);
+                        this.mem.setUint8(sp + 48, 1);
+                    },
+                    debug: (value) => {
+                        console.log(value);
+                    },
+                },
+            };
+        }
+        run(instance) {
+            return __awaiter(this, void 0, void 0, function* () {
+                this._inst = instance;
+                this.mem = new DataView(this._inst.exports.mem.buffer);
+                this._values = [
+                    // JS values that Go currently has references to, indexed by reference id
+                    NaN,
+                    0,
+                    null,
+                    true,
+                    false,
+                    global,
+                    this,
+                ];
+                this._goRefCounts = []; // number of references that Go has to a JS value, indexed by reference id
+                this._ids = new Map(); // mapping from JS values to reference ids
+                this._idPool = []; // unused ids that have been garbage collected
+                this.exited = false; // whether the Go program has exited
+                // Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
+                let offset = 4096;
+                const strPtr = (str) => {
+                    const ptr = offset;
+                    const bytes = encoder.encode(str + '\0');
+                    new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
+                    offset += bytes.length;
+                    if (offset % 8 !== 0) {
+                        offset += 8 - (offset % 8);
+                    }
+                    return ptr;
+                };
+                const argc = this.argv.length;
+                const argvPtrs = [];
+                this.argv.forEach((arg) => {
+                    argvPtrs.push(strPtr(arg));
+                });
+                argvPtrs.push(0);
+                const keys = Object.keys(this.env).sort();
+                keys.forEach((key) => {
+                    argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
+                });
+                argvPtrs.push(0);
+                const argv = offset;
+                argvPtrs.forEach((ptr) => {
+                    this.mem.setUint32(offset, ptr, true);
+                    this.mem.setUint32(offset + 4, 0, true);
+                    offset += 8;
+                });
+                this._inst.exports.run(argc, argv);
+                if (this.exited) {
+                    this._resolveExitPromise();
+                }
+                yield this._exitPromise;
+            });
+        }
+        _resume() {
+            if (this.exited) {
+                throw new Error('Go program has already exited');
+            }
+            this._inst.exports.resume();
+            if (this.exited) {
+                this._resolveExitPromise();
+            }
+        }
+        _makeFuncWrapper(id) {
+            const go = this;
+            return function () {
+                const event = { id: id, this: this, args: arguments };
+                go._pendingEvent = event;
+                go._resume();
+                return event.result;
+            };
+        }
+    };
+    if (global.require &&
+        global.require.main === module &&
+        global.process &&
+        global.process.versions &&
+        !global.process.versions.electron) {
+        if (process.argv.length < 3) {
+            console.error('usage: go_js_wasm_exec [wasm binary] [arguments]');
+            process.exit(1);
+        }
+        const go = new Go();
+        go.argv = process.argv.slice(2);
+        go.env = Object.assign({ TMPDIR: require('os').tmpdir() }, process.env);
+        go.exit = process.exit;
+        WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject)
+            .then((result) => {
+            process.on('exit', (code) => {
+                // Node.js exits if no event handler is pending
+                if (code === 0 && !go.exited) {
+                    // deadlock, make Go print error and stack traces
+                    go._pendingEvent = { id: 0 };
+                    go._resume();
+                }
+            });
+            return go.run(result.instance);
+        })
+            .catch((err) => {
+            console.error(err);
+            process.exit(1);
+        });
+    }
+})();
+//# sourceMappingURL=wasm_exec.js.map

src/konami-card.ts

@@ -0,0 +1,42 @@
+import crypto from 'crypto';
+
+declare module 'crypto' {
+  function getRandomValues(buf: Array<number> | Uint8Array | Buffer): Uint8Array;
+}
+
+crypto['getRandomValues'] = (buf: Array<number> | Uint8Array | Buffer): Uint8Array => {
+  buf = Buffer.from(buf);
+  let bytes = crypto.randomBytes(buf.length);
+  buf.set(bytes);
+  return buf;
+};
+
+require('./wasm_exec');
+
+//@ts-ignore
+const go = new Go();
+const path = require('path').join(__dirname, 'konami-card.wasm');
+const bytes = require('fs').readFileSync(path);
+const wasmModule = new WebAssembly.Module(bytes);
+const wasmInstance = new WebAssembly.Instance(wasmModule, go.importObject);
+go.run(wasmInstance).then();
+
+export const encode = function(nfcId: string) {
+  return new Promise((resolve) => {
+    // @ts-ignore
+    KONAMI_CARD_ENCODE(nfcId, function(result: string) {
+      resolve(result);
+    });
+  });
+};
+
+export const decode = function(cardId: string) {
+  return new Promise((resolve) => {
+    // @ts-ignore
+    KONAMI_CARD_DECODE(cardId, function(result: string) {
+      resolve(result);
+    });
+  });
+};
+
+export default { encode, decode };