# Vouch

There are a few ways to query an Arweave address to verify if it has been vouched by a service. Below is two of those approaches.

# VouchDAO Package

The isVouched function is made available to use in your applications in a straight-forward way.

# Installation

Add the package using npm:

npm i vouchdao

or yarn:

yarn add vouchdao

# Usage

Inside of an async function you can use the isVouched function which will return true if a user is vouched.

import { isVouched } from 'vouchdao'
(async () => {
  const res = await isVouched("ARWEAVE_ADDRESS") // true || undefined
  // ...
})();

# Using GraphQL

You can query the Arweave network using GraphQL to find out if a given Arweave address has been vouched.

query {
  transactions(
    tags:{name:"Vouch-For", values:["ARWEAVE_ADDRESS"]}
  ) {
    edges {
      node {
        id
        tags {
          name 
          value 
        }
      }
    }
  }
}

If the address has been vouched, an array of nodes will be returned with tags pertaining to the service that issues the ANS-109. You can cross reference the owner address value with the passed community votesopen in new window to ensure the service has been verified through community vote via VouchDAO.

"owner": {
 "address": "Ax_uXyLQBPZSQ15movzv9-O1mDo30khslqN64qD27Z8"
},
"tags": [
  {
    "name": "Content-Type",
    "value": "application/json"
  },
  {
    "name": "App-Name",
    "value": "Vouch"
  },
  {
    "name": "App-Version",
    "value": "0.1"
  },
  {
    "name": "Verification-Method",
    "value": "Twitter"
  },
  {
    "name": "Vouch-For",
    "value": "ARWEAVE_ADDRESS"
  }
]

# Resources

• VouchDAOopen in new window
• VouchDAO Contractopen in new window
• Arweave/GraphQL Playgroundopen in new window