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@ -0,0 +1,21 @@ |
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MIT License |
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Copyright (c) 2023 Rate-Limiting Nullifier (RLN) |
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Permission is hereby granted, free of charge, to any person obtaining a copy |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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SOFTWARE. |
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@ -0,0 +1,26 @@ |
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<h1 align=center>Rate-Limiting Nullifier circuits in Circom</h1> |
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<p align="center"> |
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<img src="https://github.com/Rate-Limiting-Nullifier/rln-circuits-v2/workflows/Test/badge.svg" width="110"> |
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</p> |
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|
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<div align="center"> |
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|
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*The project was audited by Veridise, yAcademy fellows and internally.* |
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|
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</div> |
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|
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___ |
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|
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## What's RLN? |
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RLN is a zero-knowledge gadget that enables spam |
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prevention in anonymous environments. |
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The core parts of RLN are: |
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* zk-circuits in Circom (this repo); |
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* [registry smart-contract](https://github.com/Rate-Limiting-Nullifier/rln-contract); |
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* set of libraries to build app with RLN ([rlnjs](https://github.com/Rate-Limiting-Nullifier/rlnjs), [zerokit](https://github.com/vacp2p/zerokit)). |
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|
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--- |
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|
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To learn more on RLN and how it works - check out [documentation](https://rate-limiting-nullifier.github.io/rln-docs/). |
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@ -0,0 +1,40 @@ |
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pragma circom 2.1.0; |
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include "./utils.circom"; |
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include "circomlib/poseidon.circom"; |
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template RLN(DEPTH, LIMIT_BIT_SIZE) { |
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// Private signals |
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signal input identitySecret; |
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signal input userMessageLimit; |
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signal input messageId; |
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signal input pathElements[DEPTH]; |
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signal input identityPathIndex[DEPTH]; |
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|
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// Public signals |
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signal input x; |
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signal input externalNullifier; |
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|
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// Outputs |
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signal output y; |
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signal output root; |
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signal output nullifier; |
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|
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signal identityCommitment <== Poseidon(1)([identitySecret]); |
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signal rateCommitment <== Poseidon(2)([identityCommitment, userMessageLimit]); |
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|
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// Membership check |
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root <== MerkleTreeInclusionProof(DEPTH)(rateCommitment, identityPathIndex, pathElements); |
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|
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// messageId range check |
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RangeCheck(LIMIT_BIT_SIZE)(messageId, userMessageLimit); |
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|
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// SSS share calculations |
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signal a1 <== Poseidon(3)([identitySecret, externalNullifier, messageId]); |
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y <== identitySecret + a1 * x; |
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|
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// nullifier calculation |
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nullifier <== Poseidon(1)([a1]); |
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} |
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component main { public [x, externalNullifier] } = RLN(20, 16); |
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@ -0,0 +1,45 @@ |
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pragma circom 2.1.0; |
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|
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include "circomlib/poseidon.circom"; |
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include "circomlib/mux1.circom"; |
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include "circomlib/bitify.circom"; |
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include "circomlib/comparators.circom"; |
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|
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template MerkleTreeInclusionProof(DEPTH) { |
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signal input leaf; |
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signal input pathIndex[DEPTH]; |
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signal input pathElements[DEPTH]; |
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|
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signal output root; |
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|
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signal mux[DEPTH][2]; |
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signal levelHashes[DEPTH + 1]; |
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|
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levelHashes[0] <== leaf; |
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for (var i = 0; i < DEPTH; i++) { |
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pathIndex[i] * (pathIndex[i] - 1) === 0; |
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|
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mux[i] <== MultiMux1(2)( |
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[ |
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[levelHashes[i], pathElements[i]], |
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[pathElements[i], levelHashes[i]] |
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], |
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pathIndex[i] |
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); |
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|
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levelHashes[i + 1] <== Poseidon(2)([mux[i][0], mux[i][1]]); |
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} |
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|
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root <== levelHashes[DEPTH]; |
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} |
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|
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template RangeCheck(LIMIT_BIT_SIZE) { |
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assert(LIMIT_BIT_SIZE < 253); |
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|
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signal input messageId; |
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signal input limit; |
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|
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signal bitCheck[LIMIT_BIT_SIZE] <== Num2Bits(LIMIT_BIT_SIZE)(messageId); |
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signal rangeCheck <== LessThan(LIMIT_BIT_SIZE)([messageId, limit]); |
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rangeCheck === 1; |
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} |
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@ -0,0 +1,15 @@ |
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pragma circom 2.1.0; |
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|
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include "circomlib/poseidon.circom"; |
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|
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template Withdraw() { |
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signal input identitySecret; |
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signal input address; |
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signal output identityCommitment <== Poseidon(1)([identitySecret]); |
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|
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// Dummy constraint to prevent compiler optimizing it |
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signal addressSquared <== address * address; |
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} |
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component main { public [address] } = Withdraw(); |
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@ -0,0 +1,20 @@ |
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export default async () => { |
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return { |
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// @ts-ignore
|
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'circuits/rln.circom': (await import('raw-loader!./circuits/rln.circom')).default, |
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// @ts-ignore
|
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'circuits/utils.circom': (await import('!!raw-loader!./circuits/utils.circom')).default, |
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// @ts-ignore
|
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'circuits/withdraw.circom': (await import('!!raw-loader!./circuits/withdraw.circom')).default, |
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// @ts-ignore
|
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'scripts/run_setup.ts': (await import('!!raw-loader!./scripts/run_setup.ts')).default, |
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// @ts-ignore
|
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'templates/groth16_verifier.sol.ejs': (await import('!!raw-loader!./templates/groth16_verifier.sol.ejs')).default, |
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// @ts-ignore
|
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'LICENSE-APACHE': (await import('!!raw-loader!./LICENSE-APACHE')).default, |
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// @ts-ignore
|
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'LICENSE-MIT': (await import('!!raw-loader!./LICENSE-MIT')).default, |
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// @ts-ignore
|
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'README.md': (await import('raw-loader!./README.md')).default |
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} |
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} |
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@ -0,0 +1,59 @@ |
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// eslint-disable-next-line @typescript-eslint/no-var-requires
|
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const snarkjs = require('snarkjs'); |
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|
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const logger = { |
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info: (...args) => console.log(...args), |
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debug: (...args) => console.log(...args) |
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}; |
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|
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(async () => { |
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try { |
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// @ts-ignore
|
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await remix.call('circuit-compiler', 'generateR1cs', 'circuits/rln.circom'); |
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|
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const ptau_final = "https://ipfs-cluster.ethdevops.io/ipfs/QmTiT4eiYz5KF7gQrDsgfCSTRv3wBPYJ4bRN1MmTRshpnW"; |
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// @ts-ignore
|
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const r1csBuffer = await remix.call('fileManager', 'readFile', 'circuits/.bin/rln.r1cs', true); |
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// @ts-ignore
|
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const r1cs = new Uint8Array(r1csBuffer); |
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const zkey_0 = { type: "mem" }; |
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const zkey_1 = { type: "mem" }; |
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const zkey_final = { type: "mem" }; |
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|
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console.log('newZkey') |
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await snarkjs.zKey.newZKey(r1cs, ptau_final, zkey_0); |
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|
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console.log('contribute') |
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await snarkjs.zKey.contribute(zkey_0, zkey_1, "p2_C1", "pa_Entropy1"); |
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|
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console.log('beacon') |
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await snarkjs.zKey.beacon(zkey_1, zkey_final, "B3", "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20", 10); |
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|
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console.log('verifyFromR1cs') |
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const verifyFromR1csResult = await snarkjs.zKey.verifyFromR1cs(r1cs, ptau_final, zkey_final); |
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console.assert(verifyFromR1csResult); |
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|
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console.log('verifyFromInit') |
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const verifyFromInit = await snarkjs.zKey.verifyFromInit(zkey_0, ptau_final, zkey_final); |
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console.assert(verifyFromInit); |
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|
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console.log('exportVerificationKey') |
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const vKey = await snarkjs.zKey.exportVerificationKey(zkey_final) |
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await remix.call('fileManager', 'writeFile', './zk/build/verification_key.json', JSON.stringify(vKey)) |
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|
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const templates = { |
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groth16: await remix.call('fileManager', 'readFile', 'templates/groth16_verifier.sol.ejs') |
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} |
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const solidityContract = await snarkjs.zKey.exportSolidityVerifier(zkey_final, templates) |
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|
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await remix.call('fileManager', 'writeFile', './zk/build/zk_verifier.sol', solidityContract) |
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|
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console.log('buffer', (zkey_final as any).data.length) |
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await remix.call('fileManager', 'writeFile', './zk/build/zk_setup.txt', JSON.stringify(Array.from(((zkey_final as any).data)))) |
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|
||||
console.log('setup done.') |
||||
|
||||
} catch (e) { |
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console.error(e.message) |
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} |
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})() |
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@ -0,0 +1,165 @@ |
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// SPDX-License-Identifier: GPL-3.0 |
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/* |
||||
Copyright 2021 0KIMS association. |
||||
|
||||
This file is generated with [snarkJS](https://github.com/iden3/snarkjs). |
||||
|
||||
snarkJS is a free software: you can redistribute it and/or modify it |
||||
under the terms of the GNU General Public License as published by |
||||
the Free Software Foundation, either version 3 of the License, or |
||||
(at your option) any later version. |
||||
|
||||
snarkJS is distributed in the hope that it will be useful, but WITHOUT |
||||
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
||||
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
||||
License for more details. |
||||
|
||||
You should have received a copy of the GNU General Public License |
||||
along with snarkJS. If not, see <https://www.gnu.org/licenses/>. |
||||
*/ |
||||
|
||||
pragma solidity >=0.7.0 <0.9.0; |
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|
||||
contract Groth16Verifier { |
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// Scalar field size |
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uint256 constant r = 21888242871839275222246405745257275088548364400416034343698204186575808495617; |
||||
// Base field size |
||||
uint256 constant q = 21888242871839275222246405745257275088696311157297823662689037894645226208583; |
||||
|
||||
// Verification Key data |
||||
uint256 constant alphax = <%= vk_alpha_1[0] %>; |
||||
uint256 constant alphay = <%= vk_alpha_1[1] %>; |
||||
uint256 constant betax1 = <%= vk_beta_2[0][1] %>; |
||||
uint256 constant betax2 = <%= vk_beta_2[0][0] %>; |
||||
uint256 constant betay1 = <%= vk_beta_2[1][1] %>; |
||||
uint256 constant betay2 = <%= vk_beta_2[1][0] %>; |
||||
uint256 constant gammax1 = <%= vk_gamma_2[0][1] %>; |
||||
uint256 constant gammax2 = <%= vk_gamma_2[0][0] %>; |
||||
uint256 constant gammay1 = <%= vk_gamma_2[1][1] %>; |
||||
uint256 constant gammay2 = <%= vk_gamma_2[1][0] %>; |
||||
uint256 constant deltax1 = <%= vk_delta_2[0][1] %>; |
||||
uint256 constant deltax2 = <%= vk_delta_2[0][0] %>; |
||||
uint256 constant deltay1 = <%= vk_delta_2[1][1] %>; |
||||
uint256 constant deltay2 = <%= vk_delta_2[1][0] %>; |
||||
|
||||
<% for (let i=0; i<IC.length; i++) { %> |
||||
uint256 constant IC<%=i%>x = <%=IC[i][0]%>; |
||||
uint256 constant IC<%=i%>y = <%=IC[i][1]%>; |
||||
<% } %> |
||||
|
||||
// Memory data |
||||
uint16 constant pVk = 0; |
||||
uint16 constant pPairing = 128; |
||||
|
||||
uint16 constant pLastMem = 896; |
||||
|
||||
function verifyProof(uint[2] calldata _pA, uint[2][2] calldata _pB, uint[2] calldata _pC, uint[<%=IC.length-1%>] calldata _pubSignals) public view returns (bool) { |
||||
assembly { |
||||
function checkField(v) { |
||||
if iszero(lt(v, q)) { |
||||
mstore(0, 0) |
||||
return(0, 0x20) |
||||
} |
||||
} |
||||
|
||||
// G1 function to multiply a G1 value(x,y) to value in an address |
||||
function g1_mulAccC(pR, x, y, s) { |
||||
let success |
||||
let mIn := mload(0x40) |
||||
mstore(mIn, x) |
||||
mstore(add(mIn, 32), y) |
||||
mstore(add(mIn, 64), s) |
||||
|
||||
success := staticcall(sub(gas(), 2000), 7, mIn, 96, mIn, 64) |
||||
|
||||
if iszero(success) { |
||||
mstore(0, 0) |
||||
return(0, 0x20) |
||||
} |
||||
|
||||
mstore(add(mIn, 64), mload(pR)) |
||||
mstore(add(mIn, 96), mload(add(pR, 32))) |
||||
|
||||
success := staticcall(sub(gas(), 2000), 6, mIn, 128, pR, 64) |
||||
|
||||
if iszero(success) { |
||||
mstore(0, 0) |
||||
return(0, 0x20) |
||||
} |
||||
} |
||||
|
||||
function checkPairing(pA, pB, pC, pubSignals, pMem) -> isOk { |
||||
let _pPairing := add(pMem, pPairing) |
||||
let _pVk := add(pMem, pVk) |
||||
|
||||
mstore(_pVk, IC0x) |
||||
mstore(add(_pVk, 32), IC0y) |
||||
|
||||
// Compute the linear combination vk_x |
||||
<% for (let i = 1; i <= nPublic; i++) { %> |
||||
g1_mulAccC(_pVk, IC<%=i%>x, IC<%=i%>y, calldataload(add(pubSignals, <%=(i-1)*32%>))) |
||||
<% } %> |
||||
|
||||
// -A |
||||
mstore(_pPairing, calldataload(pA)) |
||||
mstore(add(_pPairing, 32), mod(sub(q, calldataload(add(pA, 32))), q)) |
||||
|
||||
// B |
||||
mstore(add(_pPairing, 64), calldataload(pB)) |
||||
mstore(add(_pPairing, 96), calldataload(add(pB, 32))) |
||||
mstore(add(_pPairing, 128), calldataload(add(pB, 64))) |
||||
mstore(add(_pPairing, 160), calldataload(add(pB, 96))) |
||||
|
||||
// alpha1 |
||||
mstore(add(_pPairing, 192), alphax) |
||||
mstore(add(_pPairing, 224), alphay) |
||||
|
||||
// beta2 |
||||
mstore(add(_pPairing, 256), betax1) |
||||
mstore(add(_pPairing, 288), betax2) |
||||
mstore(add(_pPairing, 320), betay1) |
||||
mstore(add(_pPairing, 352), betay2) |
||||
|
||||
// vk_x |
||||
mstore(add(_pPairing, 384), mload(add(pMem, pVk))) |
||||
mstore(add(_pPairing, 416), mload(add(pMem, add(pVk, 32)))) |
||||
|
||||
|
||||
// gamma2 |
||||
mstore(add(_pPairing, 448), gammax1) |
||||
mstore(add(_pPairing, 480), gammax2) |
||||
mstore(add(_pPairing, 512), gammay1) |
||||
mstore(add(_pPairing, 544), gammay2) |
||||
|
||||
// C |
||||
mstore(add(_pPairing, 576), calldataload(pC)) |
||||
mstore(add(_pPairing, 608), calldataload(add(pC, 32))) |
||||
|
||||
// delta2 |
||||
mstore(add(_pPairing, 640), deltax1) |
||||
mstore(add(_pPairing, 672), deltax2) |
||||
mstore(add(_pPairing, 704), deltay1) |
||||
mstore(add(_pPairing, 736), deltay2) |
||||
|
||||
|
||||
let success := staticcall(sub(gas(), 2000), 8, _pPairing, 768, _pPairing, 0x20) |
||||
|
||||
isOk := and(success, mload(_pPairing)) |
||||
} |
||||
|
||||
let pMem := mload(0x40) |
||||
mstore(0x40, add(pMem, pLastMem)) |
||||
|
||||
// Validate that all evaluations ∈ F |
||||
<% for (let i=0; i<IC.length; i++) { %> |
||||
checkField(calldataload(add(_pubSignals, <%=i*32%>))) |
||||
<% } %> |
||||
|
||||
// Validate all evaluations |
||||
let isValid := checkPairing(_pA, _pB, _pC, _pubSignals, pMem) |
||||
|
||||
mstore(0, isValid) |
||||
return(0, 0x20) |
||||
} |
||||
} |
||||
} |
||||
Loading…
Reference in new issue