hollowdb-prover/lib/index.cjs

Zero-knowledge proof generator utiity for HollowDB

var $kVTRK$crypto = require("crypto");
var $kVTRK$poseidonliteposeidon1 = require("poseidon-lite/poseidon1");
var $kVTRK$snarkjs = require("snarkjs");

function $parcel$export(e, n, v, s) {
  Object.defineProperty(e, n, {get: v, set: s, enumerable: true, configurable: true});
}

$parcel$export(module.exports, "Prover", () => $122091b78650b7d0$export$4d1acfc984b63c8f);
$parcel$export(module.exports, "hashToGroup", () => $122091b78650b7d0$export$a9a26ae1d12155c4);
$parcel$export(module.exports, "computeKey", () => $122091b78650b7d0$export$fb80376c49a099f2);



const $122091b78650b7d0$var$bn254Prime = BigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617");
const $122091b78650b7d0$var$TooLargeError = new Error("Preimage is larger than the order of scalar field of BN254.");
class $122091b78650b7d0$export$4d1acfc984b63c8f {
    /** Generate a zero-knowledge proof.
     *
     * Calls {@link hashToGroup} on inputs, and then generates
     * a proof with {@link proveHashed}.
     */ async prove(preimage, curValue, nextValue) {
        return await this.proveHashed(preimage, $122091b78650b7d0$export$a9a26ae1d12155c4(curValue), $122091b78650b7d0$export$a9a26ae1d12155c4(nextValue));
    }
    /** Generate a zero-knowledge proof.
     *
     * Value inputs are expected to be results of {@link hashToGroup}. The
     * incentive of using this function instead of {@link prove} is that the
     * hash may be stored somewhere, and there is no need to hash the entire value
     * again at a later time instead of using the existing hash.
     */ async proveHashed(preimage, curValueHash, nextValueHash) {
        if (preimage >= $122091b78650b7d0$var$bn254Prime) throw $122091b78650b7d0$var$TooLargeError;
        return await (this.protocol === "groth16" ? (0, $kVTRK$snarkjs.groth16) : (0, $kVTRK$snarkjs.plonk)).fullProve({
            preimage: preimage,
            curValueHash: curValueHash,
            nextValueHash: nextValueHash
        }, this.wasmPath, this.proverKeyPath);
    }
    constructor(wasmPath, proverKeyPath, protocol = "groth16"){
        this.wasmPath = wasmPath;
        this.proverKeyPath = proverKeyPath;
        this.protocol = protocol;
    }
}
function $122091b78650b7d0$export$a9a26ae1d12155c4(value) {
    if (value) return BigInt("0x" + (0, $kVTRK$crypto.createHash)("ripemd160").update(Buffer.from(JSON.stringify(value))).digest("hex"));
    else return BigInt(0);
}
function $122091b78650b7d0$export$fb80376c49a099f2(preimage) {
    if (preimage >= $122091b78650b7d0$var$bn254Prime) throw $122091b78650b7d0$var$TooLargeError;
    return "0x" + (0, $kVTRK$poseidonliteposeidon1.poseidon1)([
        preimage
    ]).toString(16);
}


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