EZKL

The EZKL library is a set of tools to make integrating the EZKL engine into your application easier than ever.

---

Installation

To install EZKL, simply use your favorite package manager:

# npm
npm install @ezkljs/hub

# yarn
yarn add @ezkljs/hub

# pnpm
pnpm add @ezkljs/hub

---

Development

To test and develop the library you will need to run the following

# pnpm
pnpm i
pnpm build
pnpm test

---

Hub (example usage in Next.js)

To get started using EZKL Hub in your appplication you'll want to use the router submodule.

import hub from '@ezkljs/hub'

The router exposes useful APIs for interfacting with the EZKL Hub:

• healthCheck: Check the health of the EZKL Hub.
• getOrganization: Get an organization, by id or by name.
• getArtifact: Get a artifact, by id or by name and organization-name.
• getArtifacts: Get a list of artifacts currently on the EZKL Hub.
• Upload Compiled Circuit (uploadArtifact): Upload a compiled ezkl circuit to create an artifact on EZLL Hub.
• Upload ONNX Model (genArtifact): Upload a onnx model to create an artifact on the EZKL Hub.
• getArtifactSettings: Get the settings for an artifact.
• initiateProof: Initiate a proof generation task.
• getProof: Get the result of a proof generation task.
• getProofs: Get the proofs assocaited with an artifact.
• deleteProof: Delete a proof.

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Health Check

You can preform a health check on the EZKL Hub by using the healthCheck method. You can provide an optional url if you're using a custom EZKL Hub instance.

const healthStatus = await hub.healthCheck({ url: 'https://hub.ezkl.xyz' })

console.log(JSON.stringify(healthStatus, null, 2))

Output:

{
  "res": "Welcome to the ezkl hub's backend!",
  "status": "ok"
}

---

Get Organination

To get an organization you can use the getOrganization method. All users accounts have their own organization as well. All organizations have unique id and name properties.

You can query an organization by id or name.

You can also provide an optional url to specifiy an EZKL Hub backend.

type Organization = {
  id: string
  name: string
  url?: string
}

const organization: Organization = await hub.getOrganization({
  id: 'b7000626-ed7a-418c-bcf1-ccd10661855a',
})

// or

const organization: Organization = await hub.getOrganization({
  name: 'test',
})

console.log(JSON.stringify(organization, null, 2))

Output:

{
  "id": "b7000626-ed7a-418c-bcf1-ccd10661855a",
  "name": "test"
}

---

Get Artifact

To get a single artifact you can use the getArtifact method. All artifacts have unique id. An artifact is also uniquly queried by a combination of name and organization-name.

const artifact = await hub.getArtifact({
  id: 'b7000626-ed7a-418c-bcf1-ccd10661855a',
})

// or

const artifact = await hub.getArtifact({
  name: 'test',
  organizationName: 'test',
})

Get Artifacts

To query the artifacts for an organization you can use the getArtifacts method. An organization is uniquly identified by either organizationId or organizationName. You can choose to provide either.

You can also provide an optional url to specifiy an EZKL Hub backend. getArtifacts also accepts first and skip options to paginate the results.

const pageOptions: PageOptions = {
  organizationName: 'test', // or organizationId
  skip: 0,
  limit: 200,
  url: 'https://hub.ezkl.xyz',
}

const artifacts: Artifact[] = await hub.getArtifacts(pageOptions)

Artifact Settings.json

Get an artifacts settings.json configutation file with getArtifactSettings.

genArtifactSettings takes an artifact id and an optional url.

const settings = await hub.getArtifactSettings({
  id: 'b7000626-ed7a-418c-bcf1-ccd10661855a',
})

---

Upload Compiled Circuit

If your application requires the use of a model not currently on EZKL Hub, you'll want to upload your own artifact. You can do this by using the uploadArtifact method.

In order to upload an artifact you'll need to provide the following:

1. name: The name of your artifact.
2. description: A description of your artifact.
3. organizationId: The organization you wish to upload your artifact to.
4. modelFile: The model you wish to upload in compiled .ezkl format.
5. settingsFile: The settings for your model in JSON format.
6. pkFile: The proving key for your model.
7. url you can provide an optional url if you're using a custom EZKL Hub instance

This will work with either in a browser client (File) or a Node.js (Buffer) environent.

const name: string = 'My Artifact Name'
const description: string = 'My Artifact Description'
const organizationId: string = 'b7000626-ed7a-418c-bcf1-ccd10661855a' // uuid
const modelFile: File | Buffer = fs.readFileSync('/path/model.ezkl')
const settingsFile: File | Buffer = fs.readFileSync('/path/settings.json')
const pkFile: File | Buffer = fs.readFileSync('/path/pk.key')
const url: string = 'https://hub.ezkl.xyz'

const uploadArtifactResponse = await hub.uploadArtifact({
  name,
  description,
  organizationId,
  url,
  modelFile,
  settingsFile,
  pkFile,
  url,
})

console.log(JSON.stringify(uploadArtifactResponse), null, 2)

Output:

{
  "id": "6017cb49-cdb8-4648-9422-c8568de9a2f5"
}

---

Upload ONNX Model

Another option is to upload an uncompiled ONNX model and let Hub compile your circuit with default settings. You can do this by using the genArtifact method.

In order to upload an artifact you'll need to provide the following:

1. name: The name of your artifact.
2. description: A description of your artifact.
3. organizationId: The organization you wish to upload your artifact to.
4. modelFile: The model you wish to upload in .onnx format.
5. inputFile: A representative input file in JSON format.
6. url you can provide an optional url if you're using a custom EZKL Hub instance

This will work with either in a browser client (File) or a Node.js (Buffer) environent.

const name: string = 'My Artifact Name'
const description: string = 'My Artifact Description'
const organizationId: string = 'b7000626-ed7a-418c-bcf1-ccd10661855a' // uuid
const modelFile: File | Buffer = fs.readFileSync('/path/model.onnx')
const inputFile: File | Buffer = fs.readFileSync('/path/input.json')
const url: string = 'https://hub.ezkl.xyz'

const genArtifactResponse = await hub.genArtifact({
  name,
  description,
  organizationId,
  url,
  modelFile,
  inputFile,
  url,
})

console.log(JSON.stringify(genArtifactResponse), null, 2)

Output:

{
  "id": "6017cb49-cdb8-4648-9422-c8568de9a2f5"
}

---

Generate Proof

Once the artifact is on Hub and you have it's id and a dataset (input.json) you'll be able to use EZKL Hub to generate proofs. This is done in two steps: initiateProof and getProof.

---

Initiate Proof

const id: string = '6017cb49-cdb8-4648-9422-c8568de9a2f5' // uuid
const inputFile: File | Buffer = fs.readFileSync('/path/input.json')
// you can provide an optional url if you're using a custom EZKL Hub instance
const url: string = 'https://hub.ezkl.xyz'

const initiateProofResponse = await hub.initiateProof({ id, inputFile, url })

console.log(JSON.stringify(initiateProofResponse), null, 2)

Output:

{
  "id": "37cce354-34ba-4d1d-8437-bef8044671e8",
  "status": "PENDING"
}

---

Get Proof

Once the Hub as finished building your proof you'll be able to retreive it for use:

const id: string = 'c4b049c3-9770-45cf-b8ec-1bee0efc8347' // uuid
// you can provide an optional url if you're using a custom EZKL Hub instance
const url: string = 'https://hub.ezkl.xyz'

const getProofResponse = await hub.getProof({ id, url })

console.log(JSON.stringify(getProofResponse), null, 2)

Output:

{
  "taskId": "c4b049c3-9770-45cf-b8ec-1bee0efc8347",
  "status": "SUCCESS",
  "proof": "1d67f066170572524de...da16cf8b652230738b77f23f136",
  "witness": {
    "inputs": [
      [
        [25, 0, 0, 0],
        [9, 0, 0, 0],
        [19, 0, 0, 0]
      ]
    ],
    "outputs": [
      [
        [5, 0, 0, 0],
        [10, 0, 0, 0],
        [0, 0, 0, 0],
        [0, 0, 0, 0]
      ]
    ],
    "maxLookupInputs": 362
  }
}

Get Proofs

To get a link of proofs associated with an artifact you can use the getProofs method. To get the proofs you pass in the artifactName and organizationName of the artifact you want to get the proofs for. You can also provide an optional url to specifiy an EZKL Hub backend. getProofs also accepts first and skip options to paginate the results.

await hub.getProofs({
  artifactName: 'test',
  organizationName: 'test',
  first: 10,
  skip: 0,
  url: 'https://hub.ezkl.xyz',
})

Delete Proof

To delete a proof use the deleteProof method passing in the proofId and the organizationName. You can provide an optional url to specifiy an EZKL Hub backend.

await hub.deleteProof({
  proofId: 'c4b049c3-9770-45cf-b8ec-1bee0efc8347',
  organizationName: 'my-organization',
  url: 'https://hub.ezkl.xyz',
})