kalshi-typescript/dist/esm/auth.js

OpenAPI client for kalshi-typescript

import * as crypto from 'crypto';
export class KalshiAuth {
    constructor(apiKey, privateKeyPem) {
        this.apiKey = apiKey;
        this.privateKeyPem = privateKeyPem;
    }
    signPssText(text) {
        const sign = crypto.createSign('RSA-SHA256');
        sign.update(text);
        sign.end();
        const signature = sign.sign({
            key: this.privateKeyPem,
            padding: crypto.constants.RSA_PKCS1_PSS_PADDING,
            saltLength: crypto.constants.RSA_PSS_SALTLEN_DIGEST,
        });
        return signature.toString('base64');
    }
    generateAuthHeaders(method, path) {
        const currentTimeMilliseconds = Date.now();
        const timestampStr = currentTimeMilliseconds.toString();
        const msgString = timestampStr + method + path;
        const sig = this.signPssText(msgString);
        return {
            'KALSHI-ACCESS-KEY': this.apiKey,
            'KALSHI-ACCESS-SIGNATURE': sig,
            'KALSHI-ACCESS-TIMESTAMP': timestampStr
        };
    }
}