Vamp-IR
Vamp-IR is a language for arithmetic circuits. The Vamp-IR compiler can transform an arithmetic circuit into a form that is compatible with any proving system backend.
Docs
Trying Vamp-IR
Installation
git clone [email protected]:anoma/vamp-ir
cd vamp-ir
cargo build
Hello World!
We will build a circuit in Vamp-IR that checks if a pair
In a file pyth.pir :
// declare R to be public
pub R;
// define the Pythagorean relation we are checking
def pyth a b c = {
a^2 + b^2 = c^2
};
// appends constraint x^2 + y^2 = R^2 to the circuit
pyth x y R;
Compile
Compile source pyth.pir to a circuit that can be used in Halo2 and serialize it to the file pyth.halo2.
vamp-ir halo2 compile -s pyth.pir -o pyth.halo2
Create a proof
Suppose the target radius vamp-ir to create a Halo2 proof using these inputs.
First create a file pyth.inputs in JSON format which contains our solution.
{
"x": "15",
"y": "20",
"R": "25"
}
Then run the Halo2 prover using our compiled circuit and our inputs, outputting a Halo2 proof to pyth.proof.
vamp-ir halo2 prove -c pyth.halo2 -i pyth.inputs -o pyth.proof
Verify the proof
Run the Halo2 verifier using the compiled circuit and the proof.
vamp-ir halo2 verify -c pyth.halo2 -p pyth.proof
Benchmarks
These benchmarks are performed on a Lenovo ThinkPad X1 Carbon Gen 9 with 8.0 GiB RAM and an 11th Gen Intelยฎ Coreโข i5-1135G7 @ 2.40GHz ร 8 unless stated otherwise
Halo2 backend
SHA256 1 block message
Compile |
Prove |
Verify |
|
|---|---|---|---|
| Vamp-IR | 172.05 s |
26.72 s |
0.61 s |
| Halo2 | // | 161.05 s |
1.06 s |
SHA256 2 block message
Compile |
Prove |
Verify |
|
|---|---|---|---|
| Vamp-IR | 353.76 s |
46.91 s |
1.09 s |
| Halo2 | // | 160.03 s |
1.05 s |
SHA256 4 block message
Compile |
Prove |
Verify |
|
|---|---|---|---|
| Vamp-IR | 729.47 s |
Memory Failiure | X |
| Halo2 | // | 160.36 s |
1.03 s |
We re-run the with a device that has 128GB of RAM and these are the results:
Compile |
Prove |
Verify |
|
|---|---|---|---|
| Vamp-IR | 60 s |
81.983 s |
0.6 s |
ZK-garage plonk backend
Blake2s
Compile |
Prove |
Verify |
|
|---|---|---|---|
| Vamp-IR | 76.30 s |
57.59 s |
0.22 s |
| ZK-Garage | // | 32.48 s |
0.10 s |
Blake2s using only fan-in 2 gates
To have a more fair comparison between Vamp-IR and ZK-Garage, we can use only fan-in 2 gates in the Blake2s circuit. This is because the current version of Vamp-IR does not uses fan-in 3 gates, as the ZK-Garage backend does, which in a speed-up.
Compile |
Prove |
Verify |
|
|---|---|---|---|
| Vamp-IR | 76.30 s |
57.59 s |
0.22 s |
| ZK-Garage | // | 360.48 s |
0.81 s |
The version of Blake2 used for the latter benchmark can be found here: https://github.com/heliaxdev/ark-plonk/blob/blake2s/examples/blake2s_circuit_fain2.rs
License
Licensed under either of
- Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.