export const SHRIMPY_API_KEY = '77f83febf27243f68c88b2db2fd19a2991f283803a0e38c061110885b5b6cf6e';

export const shrimpySignatureGenerator = (requestPath: string, method: string, nonce: Number, body?: object): string => {
    // This is base64 encoded
    const secret = '6ace4542baa020b467951f299f628820613983d0c159dff92843ded0835825ab9fa0617e13a0e0bfc066ade8f033cb9ddf008b3a8a3d7a8debb4c709896aa1a5';

    // create the prehash string by concatenating required parts
    const prehashString = requestPath + method + nonce + (body || '');

    // decode the base64 secret
    const key = new Buffer(secret, 'base64');

    // create a sha256 hmac with the secret
    const hmac = crypto.createHmac('sha256', key);

    // hash the prehash string and base64 encode the result
    return hmac.update(prehashString).digest('base64');
}



async getToken()
    {
        Logger.log("ShrimpyMarketDataSource : Getting Token : ");

        let proxyUrl:string = 'http://52.14.231.154:8080/';
        const url: string = `https://dev-api.shrimpy.io/v1/ws/token`;
        const requestUrl = `/v1//ws/token`;
        const nonce = Date.now();
        const shrimpySignature = shrimpySignatureGenerator(requestUrl, 'GET', nonce);
        const headers = {
            'DEV-SHRIMPY-API-KEY': SHRIMPY_API_KEY,
            'DEV-SHRIMPY-API-NONCE': nonce.toString(),
            'DEV-SHRIMPY-API-SIGNATURE': shrimpySignature
        };
        const response: Response = await fetch(proxyUrl + url, {
            method: 'GET',
            headers
        });
        const token = await response.json();

        Logger.log("ShrimpyMarketDataSource : Got Token : " + token);

        this.shrimpySocketToken = token;
    }