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verify user data onchain #36

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merged 5 commits into from
Oct 14, 2024
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Merged

verify user data onchain #36

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96f4597
verify user data
zkMagus Oct 11, 2024
b974611
add test file
zkMagus Oct 12, 2024
0b84473
update function name
zkMagus Oct 12, 2024
a83815c
add some constant numbers
zkMagus Oct 12, 2024
05a830d
rename block_proof.json, and remove unused parts
zkMagus Oct 14, 2024
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50 changes: 50 additions & 0 deletions gnark_sol_caller.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"encoding/json"
"flag"
"fmt"
"github.com/succinctlabs/gnark-plonky2-verifier/types"
"io"
"log"
"math/big"
Expand Down Expand Up @@ -62,7 +63,10 @@ func generateVerifySol(outputDir string) {
Beta string
Gamma string
Delta string
Digest string
Gamma_abc string
Sigmas string
Len int
}

var config VerifyingKeyConfig
Expand All @@ -83,6 +87,39 @@ func generateVerifySol(outputDir string) {
for k, v := range vk.G1.K {
config.Gamma_abc += fmt.Sprint(" vk.gamma_abc[", k, "] = Pairing.G1Point(uint256(", v.X.String(), "), uint256(", v.Y.String(), "));\n")
}

// constant
file, err := os.Open("testdata/" + circuitName + "/block_proof.json")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer file.Close()

rawBytes, _ := io.ReadAll(file)
var publicInputsOnly types.PublicInputsOnly
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Only public input is needed. And the whole block proof is too large.

err = json.Unmarshal(rawBytes, &publicInputsOnly)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
piData := publicInputsOnly.PublicInputs[48:]
circuitDIgest := combineToBigInt(piData, 0)
config.Digest = circuitDIgest.String()

l := len(piData)/4 - 1
config.Len = l

config.Sigmas = fmt.Sprint("[\n")
for i := 0; i < l; i++ {
v := combineToBigInt(piData, i*4+4)
config.Sigmas += fmt.Sprint("\t\t\t", v)
if i < l-1 {
config.Sigmas += fmt.Sprint(",\n")
}
}
config.Sigmas += fmt.Sprint("\n\t\t]")

var buf bytes.Buffer
err = tmpl.Execute(&buf, config)
if err != nil {
Expand All @@ -97,6 +134,19 @@ func generateVerifySol(outputDir string) {
log.Println("success")
}

func combineToBigInt(data []uint64, idx int) *big.Int {
result := new(big.Int)

for i := 0; i < 4; i++ {
part := new(big.Int).SetUint64(data[idx+i])

part.Lsh(part, uint(64*(3-i)))
result.Add(result, part)
}

return result
}

func callSnarkVerifierContract(addr string, proofPath string) {

flag.Parse()
Expand Down
71 changes: 64 additions & 7 deletions hardhat/contracts/verifier.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -148,6 +148,10 @@ library Pairing {
}

contract Verifier {
uint256 constant MASK = ~(uint256(0x7) << 253);
uint256 constant EMPTY_HASH = 0x3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855;
uint256 constant CIRCUIT_DIGEST = 45802572006337895411019502263650438425956642143046192543872155962071903276348;

event VerifyEvent(address user);
event Value(uint x, uint y);

Expand All @@ -165,14 +169,14 @@ contract Verifier {
Pairing.G1Point c;
}
function verifyingKey() pure internal returns (VerifyingKey memory vk) {
vk.alpha = Pairing.G1Point(uint256(96873959053013267959748767302056221431208656859811111025931877790053498507), uint256(10441645450927248435366166425158869356306727823150630041189321052465201682647));
vk.beta = Pairing.G2Point([uint256(8803414705328568149634292811747200478686914984162532227708014782701953306575), uint256(9486642809476859975353511129350871495798686944319602556314750964122618047558)], [uint256(21234367189472523975118070661711034422016576232358165574696101766555284876329), uint256(11085532179036765008243130810371787592725890189590910537878271065010442566307)]);
vk.gamma = Pairing.G2Point([uint256(20269753739013305310466109563363320516956255279792905858565666653651783205382), uint256(9314091713854427411849772951224930933338876105176645922973375577777015918668)], [uint256(18628633857345346531910544693192264608552059414116417557756765945841469349865), uint256(3006562916099365596988347109434680502800463617175752648541891904877670284902)]);
vk.delta = Pairing.G2Point([uint256(4232603743518884997648288662797114153250338822102810071933062018211858411471), uint256(7694420283754067541591709166149613559360040456570400134518240105739057135931)], [uint256(14985948820087139155395813517597079457552944217007425322197956203688883565722), uint256(15878645987049236378267584778020271104653058712442483137645254225744086678375)]);
vk.alpha = Pairing.G1Point(uint256(15187755492409924088691730665564173847604754509782536707661645317132725823131), uint256(11244795232631889246072961547194575530139721195431809958273946888828423851249));
vk.beta = Pairing.G2Point([uint256(10989782761384117838551167851742015309811933477453686840433749290290676357037), uint256(438046816773712962043631489207895791770370572190359880682013337364861923505)], [uint256(7108173058035896241198528960286601669235644094825948111432824720591254534484), uint256(12957356768597710320308175563448984453332178670796905176555803210606320730440)]);
vk.gamma = Pairing.G2Point([uint256(8321105962283475193163454959825816477262532258692543237660011715206690953427), uint256(8843108502703865420943980199504959687977966807389974093317093747515988658084)], [uint256(3108487886876575696059459297884074680950482006124642842222727501175892807767), uint256(17419604077663621816813377889604541575663101381648173236273396989866888142033)]);
vk.delta = Pairing.G2Point([uint256(11957476927901407803979333905458629036714551522334638774698445528062073700627), uint256(2378303099270793535197981922428109752565350562029812149826331750284754573004)], [uint256(4037460900930362093814262801804587900421035432689717352912776568966697310378), uint256(13652548886455759172776350249569844942514642601568259198863761875775556329031)]);
vk.gamma_abc = new Pairing.G1Point[](3);
vk.gamma_abc[0] = Pairing.G1Point(uint256(20884214517921629383003290105349625484401800208000607985201923666422490700872), uint256(4120500315429728788278065002540417634437715062570994769852125642113074875925));
vk.gamma_abc[1] = Pairing.G1Point(uint256(18219918118414871196378239452332925748253714300991936375187105734991661966325), uint256(6533332613797508802539245184400316885943852231395015125921302030255857576629));
vk.gamma_abc[2] = Pairing.G1Point(uint256(21431655864403236306272355799302487545310274856444971090513710811704909341141), uint256(15687590263837373289886909763696884721191431689757440379265802598039900955444));
vk.gamma_abc[0] = Pairing.G1Point(uint256(12877663106954766715158711494017191156831126035865136062215759169565259442431), uint256(8470645008543173101839438966774817212527776674167739478698937180812098700873));
vk.gamma_abc[1] = Pairing.G1Point(uint256(8372976737890971086215661176430684693796268284703282804351909348752602883302), uint256(10823071153869376037698173677521545763850985127945610767886220535899033712602));
vk.gamma_abc[2] = Pairing.G1Point(uint256(5695472601163533019036890268047049059069216926502540944899868385455603624278), uint256(11497379498303636587143577692306788587353110476019412144139314447458341532249));

}
function verify(uint[2] memory input, Proof memory proof, uint[2] memory proof_commitment) public view returns (uint) {
Expand Down Expand Up @@ -213,4 +217,57 @@ contract Verifier {
}

}

function verifyUserData(
uint8[32] memory _userData,
uint32[8] memory _memRootBefore,
uint32[8] memory _memRootAfter
) public pure returns (uint256) {
uint256 userData = 0;
for (uint256 i = 0; i < 32; i++) {
userData |= uint256(_userData[i]) << (8 * (31 - i));
}
uint256 memRootBefore = 0;
for (uint256 i = 0; i < 8; i++) {
memRootBefore |= uint256(_memRootBefore[i]) << (32 * (7 - i));
}
uint256 memRootAfter = 0;
for (uint256 i = 0; i < 8; i++) {
memRootAfter |= uint256(_memRootAfter[i]) << (32 * (7 - i));
}

bytes memory dataToHash = abi.encodePacked(
memRootBefore,
memRootAfter,
userData,
CIRCUIT_DIGEST,
getConstantSigmasCap()
);

uint256 hash_o = uint256(sha256(dataToHash)) & MASK;
uint256 hashValue = uint256(sha256(abi.encodePacked(EMPTY_HASH,hash_o))) & MASK;

return hashValue;
}

function getConstantSigmasCap() public pure returns (uint256[16] memory) {
return [
42905320495155533179082755361525614325799445168925125785520592621410769352512,
40078934974875561790840582028025922525310666074919062055994874012712229657404,
48181723683446589551781603050917093533327364296458478200249081053309743675626,
99953223481667200655812553572439281563286381599314132096871865509610804217665,
109976962389214609528728036349885587261382008740664018743942175315900816601495,
45002151756787366800725477445890122391395894449045491326488730875219630474492,
13366150267946903582680610511751610450430555921694164662767573859069146871709,
35495266795011058349886422884892499506028127882115395472725033785822651924583,
48516677340987805603385710414196743664581917040034799309341175822603164556408,
4981796824908419741724131952728916950483829617510358485422131334958243440084,
29185831484148079300482854105720602754275423569354835712070430352016016774970,
81487854324520445386760939795986949580452963945517706094780241643990487145101,
106049498744970972966451878009886156178028840027451684744092103451702538944479,
104544792628330935133977881082262650161316212447422073986520113019692857983265,
63088502389400783777410965540653553472978441645603353216113707762512042227231,
67298202005889430393471077453600150679872617990748460277890517723148728589859
];
}
}
73 changes: 45 additions & 28 deletions hardhat/test/Verifier.js
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Original file line number Diff line number Diff line change
@@ -1,50 +1,67 @@
const fs = require('fs');
const { expect } = require("chai");
const { ethers } = require('hardhat');
const assert = require("node:assert");

describe('Verifier', function () {
describe('Verifier', function () {
let verifier;
let signer;
before(async function () {
const VerifierFactory = await ethers.getContractFactory('Verifier');

before(async function () {
const VerifierFactory = await ethers.getContractFactory('Verifier');
verifier = await VerifierFactory.deploy();
// console.log(verifier);
// await verifier.deployed();
[signer] = await ethers.getSigners();
});
it('Should submit a proof', async function () {
const data = JSON.parse(fs.readFileSync('./test/snark_proof_with_public_inputs.json', 'utf8'));
const commitmentX = ethers.getBigInt(data['Proof']['Commitments'][0]['X']);
const commitmentY = ethers.getBigInt(data['Proof']['Commitments'][0]['Y']);

it('Should submit a proof', async function () {
const data = JSON.parse(fs.readFileSync('./test/snark_proof_with_public_inputs.json', 'utf8'));
const commitmentX = ethers.getBigInt(data['Proof']['Commitments'][0]['X']);
const commitmentY = ethers.getBigInt(data['Proof']['Commitments'][0]['Y']);
const commitments = [commitmentX, commitmentY];
const uint256input = data['PublicWitness'].map((numStr) => ethers.getBigInt(numStr));
const aPoint = {
X: ethers.getBigInt(data['Proof']['Ar']['X']),
Y: ethers.getBigInt(data['Proof']['Ar']['Y'])
const uint256input = data['PublicWitness'].map((numStr) => ethers.getBigInt(numStr));
const aPoint = {
X: ethers.getBigInt(data['Proof']['Ar']['X']),
Y: ethers.getBigInt(data['Proof']['Ar']['Y'])
};

const bPoint = {
X: [ethers.getBigInt(data['Proof']['Bs']['X']['A0']), ethers.getBigInt(data['Proof']['Bs']['X']['A1'])],
Y: [ethers.getBigInt(data['Proof']['Bs']['Y']['A0']), ethers.getBigInt(data['Proof']['Bs']['Y']['A1'])]
X: [ethers.getBigInt(data['Proof']['Bs']['X']['A0']), ethers.getBigInt(data['Proof']['Bs']['X']['A1'])],
Y: [ethers.getBigInt(data['Proof']['Bs']['Y']['A0']), ethers.getBigInt(data['Proof']['Bs']['Y']['A1'])]
};
const cPoint = {
X: ethers.getBigInt(data['Proof']['Krs']['X']),
Y: ethers.getBigInt(data['Proof']['Krs']['Y'])

const cPoint = {
X: ethers.getBigInt(data['Proof']['Krs']['X']),
Y: ethers.getBigInt(data['Proof']['Krs']['Y'])
};

const proof = {
a: { ...aPoint },
b: { ...bPoint },
c: { ...cPoint }
};
a: {...aPoint},
b: {...bPoint},
c: {...cPoint}
};

const result = await verifier.verify(uint256input, proof, commitments);
expect(result).to.equal(0);

// const tx = await verifier.connect(signer).verifyTx(proof, uint256input, commitments);
// console.log(tx);
});
});
});


it('Verify user data', async function () {
const rawData = JSON.parse(fs.readFileSync('./test/block_proof.json', 'utf8'));
const data = rawData['public_inputs'];

const memBefore = data.slice(0, 8);
const memAfter = data.slice(8, 16);
const userData = data.slice(16, 48);
const result = await verifier.verifyUserData(userData, memBefore, memAfter);

const snarkProofData = JSON.parse(fs.readFileSync('./test/snark_proof_with_public_inputs.json', 'utf8'));
const expectedPublicInput = ethers.getBigInt(snarkProofData['PublicWitness'][0]);

assert(result === expectedPublicInput);
});
})
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