60 lines
1.4 KiB
TypeScript
60 lines
1.4 KiB
TypeScript
import { Candle, Trade, Coder } from './interfaces';
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export class Base64TradeCoder implements Coder<Trade> {
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constructor() {};
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encode(t: Trade): string {
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const buf = Buffer.alloc(14);
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buf.writeFloatLE(t.price, 0);
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buf.writeFloatLE(t.size, 4);
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buf.writeUIntLE(t.ts, 8, 6);
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const base64 = buf.toString('base64');
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return base64;
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};
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decode(s: string): Trade {
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const buf = Buffer.from(s, 'base64');
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const trade = {
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price: buf.readFloatLE(0),
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size: buf.readFloatLE(4),
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ts: buf.readUIntLE(8, 6)
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};
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return trade;
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};
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};
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export class Base64CandleCoder implements Coder<Candle> {
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constructor() {};
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encode(c: Candle): string {
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const buf = Buffer.alloc(36);
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buf.writeFloatLE(c.open, 0);
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buf.writeFloatLE(c.close, 4);
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buf.writeFloatLE(c.high, 8);
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buf.writeFloatLE(c.low, 12);
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buf.writeFloatLE(c.volume, 16);
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buf.writeFloatLE(c.vwap, 20);
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buf.writeUIntLE(c.start, 24, 6);
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buf.writeUIntLE(c.end, 30, 6);
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const base64 = buf.toString('base64');
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return base64;
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};
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decode(s: string): Candle {
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const buf = Buffer.from(s, 'base64');
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const candle = {
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open: buf.readFloatLE(0),
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close: buf.readFloatLE(4),
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high: buf.readFloatLE(8),
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low: buf.readFloatLE(12),
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volume: buf.readFloatLE(16),
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vwap: buf.readFloatLE(20),
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start: buf.readUIntLE(24, 6),
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end: buf.readUIntLE(30, 6)
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};
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return candle;
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};
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}
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