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:
npm i vouchdao
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 votes 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"
}
]