A library to generate and verify Semaphore proofs.
| This library provides utility functions to generate and verify Semaphore proofs compatible with the Semaphore circuits. Generating valid zero-knowledge proofs requires files that can only be obtained in an attested trusted-setup ceremony. |
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Install the @semaphore-protocol/proof package and its peer dependencies with npm:
npm i @semaphore-protocol/identity @semaphore-protocol/group @semaphore-protocol/proofor yarn:
yarn add @semaphore-protocol/identity @semaphore-protocol/group @semaphore-protocol/proofFor more information on the functions provided by @semaphore-protocol/proof, please refer to the TypeDoc documentation.
# generateProof( identity: Identity, group: Group, message: BigNumberish | Uint8Array | string, scope: BigNumberish | Uint8Array | string, merkleTreeDepth: number, snarkArtifacts?: SnarkArtifacts ): Promise<SemaphoreProof>
import { Identity } from "@semaphore-protocol/identity"
import { Group } from "@semaphore-protocol/group"
import { generateProof } from "@semaphore-protocol/proof"
const identity1 = new Identity()
const identity2 = new Identity()
const identity3 = new Identity()
const group = new Group([identity1.commitment, identity2.commitment, identity3.commitment])
const message = "Hello world"
const scope = "Semaphore"
// snarkArtifacts are not provided.
// So they will be automatically downloaded (see https://github.com/privacy-scaling-explorations/snark-artifacts).
const proof1 = await generateProof(identity1, group, message, scope)
// You can also specify the maximum tree depth supported by the proof.
const proof2 = await generateProof(identity2, group, message, scope, 20)
// You can also override our default zkey/wasm files.
const proof3 = await generateProof(identity3, group, message, scope, 20, {
wasm: "./semaphore.wasm",
zkey: "./semaphore.zkey"
})# verifyProof(semaphoreProof: SemaphoreProof): Promise<boolean>
import { verifyProof } from "@semaphore-protocol/proof"
await verifyProof(proof1)