deno

Space and Time (SxT) Proof of SQL SDK - Deno Example

Introduction

This is a simple example showing how to use the Deno runtime to query SXTChain and verify the results. See README for an overview of the SDK.

Install Deno

Follow instructions here: https://docs.deno.com/runtime/getting_started/installation/. Or just run curl -fsSL https://deno.land/install.sh | sh

Getting an API Key

An API key is required to interact with SxT services. To obtain an API key, please refer to the Space and Time docs.

Running Deno Example

The PoSQL SDK supports features JavaScript support. You can setup a deno environment in the following manner:

// Import the package
const SxTSDK = await import("npm:sxt-proof-of-sql-sdk");

// Define test parameters
const queryString = "SELECT SUM(TRANSACTION_COUNT) as t_count, COUNT(*) as b_count FROM ETHEREUM.BLOCKS";
const table = "ETHEREUM.BLOCKS";


// Initialize the SxTClient instance
const proof = new SxTSDK.SxTClient(
    "https://api.spaceandtime.dev/v1/prove",
    "https://proxy.api.spaceandtime.dev/auth/apikey",
    "https://rpc.testnet.sxt.network/",
    Deno.env.get("SXT_API"),
);

try {
    // Kick off the proof and await execution
    const result = await proof.queryAndVerify(
        queryString,
        table
    );

    let t_count = result.table.t_count.Int[0];
    let b_count = result.table.b_count.BigInt[0];
    console.log("Average eth transactions per block: ", t_count / b_count);

    console.log("Workflow completed successfully:", result);
} catch (error) {
    console.log("Workflow failed: ", error);
}

Then export your API key, and run with the following:

export SXT_API="your api key here"
deno run --allow-net --allow-env examples/deno/query.js