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5c2aaec1ca
The time on the parsing doesn't improve, as the data from the binary file needs to be converted to `affine` representation, and then parsed into the `bn256.G1` & `bn256.G2` formats (Montgomery). But the size of the ProvingKey files in binary is much smaller, so will be better handled by the smarthpones. - Parse time benchmarks: ``` BenchmarkParsePk/Parse_Pk_bin_circuit1k-4 2 563729994 ns/op BenchmarkParsePk/Parse_Pk_json_circuit1k-4 635641 1941 ns/op BenchmarkParsePk/Parse_Pk_bin_circuit5k-4 1 2637941658 ns/op BenchmarkParsePk/Parse_Pk_json_circuit5k-4 1 2986560185 ns/op BenchmarkParsePk/Parse_Pk_bin_circuit10k-4 1 5337639150 ns/op BenchmarkParsePk/Parse_Pk_json_circuit10k-4 1 6149568824 ns/op BenchmarkParsePk/Parse_Pk_bin_circuit20k-4 1 10533654623 ns/op BenchmarkParsePk/Parse_Pk_json_circuit20k-4 1 11657326851 ns/op ``` - Size of ProvingKey file for a circuit of 50k constraints: ``` circuit 20k constraints: 10097812 bytes of proving_key.bin 29760049 bytes of proving_key.json circuit 50k constraints: 24194964 bytes of proving_key.bin 71484081 bytes of proving_key.json ```
go-circom-prover-verifier 
Go implementation of the Groth16 protocol zkSNARK prover & verifier compatible with circom.
Using bn256 (used by go-ethereum) for the Pairing curve operations.
Example
- Generate Proof
import (
"github.com/iden3/go-circom-prover-verifier/parsers"
"github.com/iden3/go-circom-prover-verifier/prover"
"github.com/iden3/go-circom-prover-verifier/verifier"
)
[...]
// read ProvingKey & Witness files
provingKeyJson, _ := ioutil.ReadFile("../testdata/small/proving_key.json")
witnessJson, _ := ioutil.ReadFile("../testdata/small/witness.json")
// parse Proving Key
pk, _ := parsers.ParsePk(provingKeyJson)
// parse Witness
w, _ := parsers.ParseWitness(witnessJson)
// generate the proof
proof, pubSignals, _ := prover.GenerateProof(pk, w)
// print proof & publicSignals
proofStr, _ := parsers.ProofToJson(proof)
publicStr, _ := json.Marshal(parsers.ArrayBigIntToString(pubSignals))
fmt.Println(proofStr)
fmt.Println(publicStr)
- Verify Proof
// read proof & verificationKey & publicSignals
proofJson, _ := ioutil.ReadFile("../testdata/big/proof.json")
vkJson, _ := ioutil.ReadFile("../testdata/big/verification_key.json")
publicJson, _ := ioutil.ReadFile("../testdata/big/public.json")
// parse proof & verificationKey & publicSignals
public, _ := parsers.ParsePublicSignals(publicJson)
proof, _ := parsers.ParseProof(proofJson)
vk, _ := parsers.ParseVk(vkJson)
// verify the proof with the given verificationKey & publicSignals
v := verifier.Verify(vk, proof, public)
fmt.Println(v)
CLI
From the cli directory:
- Show options
> go run cli.go -help
go-circom-prover-verifier
v0.0.1
Usage of /tmp/go-build620318239/b001/exe/cli:
-proof string
proof path (default "proof.json")
-prove
prover mode
-provingkey string
provingKey path (default "proving_key.json")
-public string
public signals path (default "public.json")
-verificationkey string
verificationKey path (default "verification_key.json")
-verify
verifier mode
-witness string
witness path (default "witness.json")
- Prove
> go run cli.go -prove -provingkey=../testdata/circuit5k/proving_key.json -witness=../testdata/circuit5k/witness.json
- Verify
> go run cli.go -verify -verificationkey=../testdata/circuit5k/verification_key.json