| 1 | "use strict";
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| 2 | Object.defineProperty(exports, "__esModule", { value: true });
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| 3 | const bignumber_js_1 = require("bignumber.js");
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| 4 | const log_1 = require("../common/log");
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| 5 | const log = log_1.create('randomizer-backend');
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| 6 | class RandomizerBackend {
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| 7 | constructor(opts, api) {
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| 8 | this.spread = opts.spread || 0;
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| 9 | this.variation = opts.variation || 0.1;
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| 10 | this.getInfo = api.getInfo;
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| 11 | this.variation = Math.min(Math.abs(this.variation), 1);
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| 12 | log.warn('(!!!) using the randomizer backend. variation=%s', this.variation);
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| 13 | }
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| 14 | async connect() {
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| 15 | }
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| 16 | async getRate(sourceAccount, destinationAccount) {
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| 17 | const sourceInfo = this.getInfo(sourceAccount);
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| 18 | const destinationInfo = this.getInfo(destinationAccount);
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| 19 | if (!sourceInfo) {
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| 20 | log.error('unable to fetch account info for source account. accountId=%s', sourceAccount);
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| 21 | throw new Error('unable to fetch account info for source account. accountId=' + sourceAccount);
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| 22 | }
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| 23 | if (!destinationInfo) {
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| 24 | log.error('unable to fetch account info for destination account. accountId=%s', destinationAccount);
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| 25 | throw new Error('unable to fetch account info for destination account. accountId=' + destinationAccount);
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| 26 | }
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| 27 | const scaleDiff = destinationInfo.assetScale - sourceInfo.assetScale;
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| 28 | const randomness = Math.max((0.5 - Math.random()) * this.variation * 2, -1).toFixed(5);
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| 29 | const rate = new bignumber_js_1.default(1).plus(randomness).minus(this.spread).shiftedBy(scaleDiff).toPrecision(15);
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| 30 | return Number(rate);
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| 31 | }
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| 32 | submitPayment() {
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| 33 | return Promise.resolve();
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| 34 | }
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| 35 | }
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| 36 | exports.default = RandomizerBackend;
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| 37 | |
| \ | No newline at end of file |