SealHub Kit

Set of functions useful when working with the commitments generated by SealHub

Available functions

createMessage(address: string) => string

Create a message to sign

Parameters

• address: string — wallet owner address

generateInputs(signature: string, message: string, provider: Provider)

Generates an input to create a zk proof

Parameters

• message: string — a message created using the createMessage(wallet.address) function
• signature: string — signature made by wallet.signMessage(message)
• provider: Provider — abstract Ethereum provider

Returns

{
  commitmentMerkleRootIndex: number
  pathIndices: number[]
  siblings: string[]
  TPreComputes: string[][][][]
  U: string[][]
  s: string[][]
  r: string[][]
}

Example

import { Wallet, providers } from 'ethers'
import { createMessage, generateCommitment } from '@big-whale-labs/seal-hub-kit'

const provider = new providers.InfuraProvider('goerli')
const wallet = new Wallet()
const message = createMessage(wallet.address)
const signature = wallet.signMessage(message)

const zkInput = generateInputs(signature, message, provider)

generateSignatureInputs(signature: string, message: string)

Generates an input to create a commitment's zk proof

Parameters

• message: string — a message created using the createMessage(wallet.address) function
• signature: string — signature made by wallet.signMessage(message)

Returns

{
  TPreComputes: string[][][][]
  U: string[][]
  s: string[][]
  r: string[][]
}

generateCommitment(signature: string, message: string) => string

Create a commitment based on the message and signature

Parameters

• message: string — a message created using the createMessage(wallet.address) function
• signature: string — signature made by wallet.signMessage(message)

Example

import { Wallet } from 'ethers'
import { createMessage, generateCommitment } from '@big-whale-labs/seal-hub-kit'

const wallet = new Wallet()
const message = createMessage(wallet.address)
const signature = wallet.signMessage(message)

const commitment = generateCommitment(signature, message)

hasCommitment(commitment: string | bigint, provider: Provider) => boolean

Checks for a commitment in the SealHub contract

Parameters

• commitment: string | bigint — hash generated by generateCommitment
• provider: Provider — abstract Ethereum provider

Available Scripts

• yarn start — development mode, rebuilds on changes
• yarn build — builds utils
• yarn release — create a release and publish the package