Feature/add zk circuits and contracts

backend/.gitignore

@@ -1,14 +1,136 @@
-node_modules
-.env
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
 coverage
-coverage.json
-typechain
-typechain-types
+*.lcov
 
-#Hardhat files
-cache
-artifacts
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
 
 .debugger/
 compiler_config.json
 remix-compiler.config.js
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and *not* Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+circuits/build
+artifacts
+cache
+*.ptau
+deployments

backend/circuits/HashCheck/circuit.circom

@@ -0,0 +1,20 @@
+pragma circom 2.0.0;
+
+include "../../node_modules/circomlib/circuits/mimcsponge.circom";
+
+template Main() {
+  signal input x;
+  signal input hash;
+
+  signal output out;
+
+  component mimc = MiMCSponge(1, 220, 1);
+  mimc.ins[0] <== x;
+  mimc.k <== 0;
+
+  out <== mimc.outs[0];
+
+  out === hash;
+}
+
+component main = Main();

backend/circuits/HashCheck/compileHashCheck.sh

@@ -0,0 +1,43 @@
+
+mkdir build
+
+rm build/circuit.r1cs
+rm build/circuit.sym
+rm build/circuit_0000.zkey
+rm build/circuit_js
+rm build/witness.wtns
+rm build/pot12_0000.ptau
+rm build/pot12_0001.ptau
+rm build/pot12_final.ptau
+
+if [ -f ./powersOfTau28_hez_final_12.ptau ]; then
+    echo "powersOfTau28_hez_final_12.ptau already exists. Skipping."
+else
+    echo 'Downloading powersOfTau28_hez_final_12.ptau'
+    wget https://hermez.s3-eu-west-1.amazonaws.com/powersOfTau28_hez_final_12.ptau
+fi
+
+echo "Compiling circuit.circom..."
+
+circom circuit.circom --r1cs --wasm --sym -o build
+node build/circuit_js/generate_witness.js build/circuit_js/circuit.wasm build/input.json build/witness.wtns
+# # # cp circuit/witness.wtns ../witness.wtns
+
+snarkjs r1cs info build/circuit.r1cs
+
+# # # phase 1 of ceremony
+snarkjs powersoftau new bn128 12 build/pot12_0000.ptau -v
+snarkjs powersoftau contribute build/pot12_0000.ptau build/pot12_0001.ptau --name="First contribution" -v
+
+# # # phase 2 of ceremony
+snarkjs powersoftau prepare phase2 build/pot12_0001.ptau build/pot12_final.ptau -v
+snarkjs groth16 setup build/circuit.r1cs powersOfTau28_hez_final_12.ptau build/circuit_0000.zkey
+snarkjs zkey contribute build/circuit_0000.zkey build/circuit_final.zkey --name="1st Contribution Name" -v -e="random text"
+snarkjs zkey export verificationkey build/circuit_final.zkey build/verification_key.json
+snarkjs groth16 prove build/circuit_final.zkey build/witness.wtns build/proof.json build/public.json
+snarkjs groth16 verify build/verification_key.json build/public.json build/proof.json
+
+
+
+snarkjs zkey export solidityverifier build/circuit_final.zkey build/circuitVerifier.sol
+

backend/circuits/OTPVerification/circuit.circom

@@ -0,0 +1,66 @@
+pragma circom 2.0.0;
+
+include "../../node_modules/circomlib/circuits/poseidon.circom";
+include "../../node_modules/circomlib/circuits/mux1.circom";
+
+template hashLeaves(){
+    signal input leftLeaf;
+    signal input rightLeaf;
+
+    signal output out;
+
+    component h = Poseidon(2);
+    h.inputs[0] <== leftLeaf;
+    h.inputs[1] <== rightLeaf;
+
+    out <== h.out;
+}
+
+template MerkleTreeInclusionVerification(n) {
+    signal input time;
+    signal input otp;
+    signal input pathElements[n];
+    signal input pathIndex[n];
+
+    signal output root;
+
+    signal leaf;
+
+    component hl = hashLeaves();
+    hl.leftLeaf <== time;
+    hl.rightLeaf <== otp;
+
+    leaf <== hl.out;
+
+    component h[n];
+    signal levelHashes[n+1];
+
+    levelHashes[0] <== leaf;
+
+    component mux[n];
+
+    for(var i=0; i<n; i++){
+
+        (pathIndex[i])*(1 - pathIndex[i]) === 0;
+
+        h[i] = hashLeaves();
+        mux[i] = MultiMux1(2);
+
+        mux[i].c[0][0] <== levelHashes[i];
+        mux[i].c[0][1] <== pathElements[i];
+
+        mux[i].c[1][0] <== pathElements[i];
+        mux[i].c[1][1] <== levelHashes[i];
+
+        mux[i].s <== pathIndex[i];
+
+        h[i].leftLeaf <== mux[i].out[0];
+        h[i].rightLeaf <== mux[i].out[1];
+
+        levelHashes[i+1] <== h[i].out;
+    }
+
+    root <== levelHashes[n];
+}
+
+component main { public [time] } = MerkleTreeInclusionVerification(7);

backend/circuits/OTPVerification/compile.sh

@@ -0,0 +1,42 @@
+
+mkdir build
+
+rm build/circuit.r1cs
+rm build/circuit.sym
+rm build/circuit_0000.zkey
+rm build/circuit_js
+rm build/witness.wtns
+rm build/pot12_0000.ptau
+rm build/pot12_0001.ptau
+rm build/pot12_final.ptau
+
+if [ -f ./powersOfTau28_hez_final_12.ptau ]; then
+    echo "powersOfTau28_hez_final_12.ptau already exists. Skipping."
+else
+    echo 'Downloading powersOfTau28_hez_final_12.ptau'
+    wget https://hermez.s3-eu-west-1.amazonaws.com/powersOfTau28_hez_final_12.ptau
+fi
+
+echo "Compiling circuit.circom..."
+
+circom circuit.circom --r1cs --wasm --sym -o build
+node build/circuit_js/generate_witness.js build/circuit_js/circuit.wasm build/input.json build/witness.wtns
+# # # cp circuit/witness.wtns ../witness.wtns
+
+snarkjs r1cs info build/circuit.r1cs
+
+# # # phase 1 of ceremony
+snarkjs powersoftau new bn128 12 build/pot12_0000.ptau -v
+snarkjs powersoftau contribute build/pot12_0000.ptau build/pot12_0001.ptau --name="First contribution" -v
+
+# # # phase 2 of ceremony
+snarkjs powersoftau prepare phase2 build/pot12_0001.ptau build/pot12_final.ptau -v
+snarkjs groth16 setup build/circuit.r1cs powersOfTau28_hez_final_12.ptau build/circuit_0000.zkey
+snarkjs zkey contribute build/circuit_0000.zkey build/circuit_final.zkey --name="1st Contribution Name" -v -e="random text"
+snarkjs zkey export verificationkey build/circuit_final.zkey build/verification_key.json
+snarkjs groth16 prove build/circuit_final.zkey build/witness.wtns build/proof.json build/public.json
+snarkjs groth16 verify build/verification_key.json build/public.json build/proof.json
+
+
+
+snarkjs zkey export solidityverifier build/circuit_final.zkey build/circuitVerifier.sol

backend/circuits/compile.sh

@@ -0,0 +1,42 @@
+
+mkdir HashCheck
+
+rm HashCheck/HashCheck.r1cs
+rm HashCheck/HashCheck.sym
+rm HashCheck/circuit_0000.zkey
+rm HashCheck/HashCheck_js
+rm HashCheck/witness.wtns
+rm HashCheck/pot12_0000.ptau
+rm HashCheck/pot12_0001.ptau
+rm HashCheck/pot12_final.ptau
+
+if [ -f ./powersOfTau28_hez_final_10.ptau ]; then
+    echo "powersOfTau28_hez_final_10.ptau already exists. Skipping."
+else
+    echo 'Downloading powersOfTau28_hez_final_10.ptau'
+    wget https://hermez.s3-eu-west-1.amazonaws.com/powersOfTau28_hez_final_10.ptau
+fi
+
+echo "Compiling HashCheck.circom..."
+
+circom HashCheck.circom --r1cs --wasm --sym -o HashCheck
+node HashCheck/HashCheck_js/generate_witness.js HashCheck/HashCheck_js/HashCheck.wasm HashCheck/input.json HashCheck/witness.wtns
+# # cp HashCheck/witness.wtns ../witness.wtns
+
+snarkjs r1cs info HashCheck/HashCheck.r1cs
+
+# # phase 1 of ceremony
+snarkjs powersoftau new bn128 12 HashCheck/pot12_0000.ptau -v
+snarkjs powersoftau contribute HashCheck/pot12_0000.ptau HashCheck/pot12_0001.ptau --name="First contribution" -v
+
+# # phase 2 of ceremony
+snarkjs powersoftau prepare phase2 HashCheck/pot12_0001.ptau HashCheck/pot12_final.ptau -v
+snarkjs groth16 setup HashCheck/HashCheck.r1cs powersOfTau28_hez_final_10.ptau HashCheck/circuit_0000.zkey
+snarkjs zkey contribute HashCheck/circuit_0000.zkey HashCheck/circuit_final.zkey --name="1st Contribution Name" -v -e="random text"
+snarkjs zkey export verificationkey HashCheck/circuit_final.zkey HashCheck/verification_key.json
+snarkjs groth16 prove HashCheck/circuit_final.zkey HashCheck/witness.wtns HashCheck/proof.json HashCheck/public.json
+snarkjs groth16 verify HashCheck/verification_key.json HashCheck/public.json HashCheck/proof.json
+
+
+
+# snarkjs zkey export solidityverifier HashCheck/circuit_final.zkey HashCheck/HashCheckVerifier.sol