fundsdb-zkpengine/src/database/sql_engine.js

A Zero-Knowledge Proof Engine using SnarkJS and PostgreSQL

const crypto = require("crypto"); // ✅ Correct import

/**
 * 🔹 Transforms SQL queries into a structured proof-ready format
 * @param {string} sqlQuery - The raw SQL query
 * @returns {object} - ZK-compatible structured query proof
 */
function compileQueryProof(input) {
    if (!input || typeof input !== "string") {
        throw new Error("Invalid input: Expected a non-empty string");
    }

    return {
        original: input,
        hashed: crypto.createHash("sha256").update(input).digest("hex"), // Hashing input
        zkSafe: Buffer.from(input).toString("base64"), // Base64 encoding for safety
        FastFile: "default_fastfile_value" // Ensure FastFile exists
    };
}

/**
 * 🔹 Converts a SQL query into a hash (Mock Implementation)
 * @param {string} query - SQL query
 * @returns {string} - Hashed version of the query
 */
function hashSQL(query) {
    return require("crypto").createHash("sha256").update(query).digest("hex");
}

/**
 * 🔹 Encodes a SQL query for Zero-Knowledge processing
 * @param {string} query - SQL query
 * @returns {string} - ZK-Safe encoded query
 */
function encodeForZK(query) {
    return Buffer.from(query).toString("base64"); // Simple Base64 encoding (replace with real ZKP encoding)
}

module.exports = { compileQueryProof };