NFT | Ownership Verification

NFTs verification enables multiple use cases. The NFT Kit provides numerous approaches to verify the ownership of the NFTs and that the NFTs have customized properties.

NFT ownership verification:

You can use this API to verify if an account is the real owner of an NFT.

REST API

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "https://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/{chain}/verifyNftOwnership" 
-H  "accept: application/json"

Path Params :

• chain : chain to work with. Either ALGORAND_TESTNET , ALGORAND_BETANET, ALGORAND_MAINNET

• assetId : The id of the Asset

• address : Address of the NFT holder

Example :

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/ALGORAND_TESTNET/verifyNftOwnership?assetId=257177857&account=GYFVJLKGSWQDHFBHBLABUXYHHSU544RV3WH4ZCF3S6HONSDP73TK4VGY3Y" 
-H  "accept: application/json"

Kotlin

import id.walt.nftkit.services.AlgorandNftService
import id.walt.nftkit.services.AlgorandChain


val assetId = "257177850"
val address = "GYFVJLKGSWQDHFBHBLABUXYHHSU544RV3WH4ZCF3S6HONSDP73TK4VGY3Y"
val result = AlgorandNftService.verifyOwnership(address , assetId, AlgorandChain.TESTNET)
println(result)

NFT ownership verification with traits :

You can use this API to verify if an account is the real owner of an NFT existed in Algorand blockchain with NFT property verification.

REST API

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "https://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/{chain}/verifyAlgorandNftOwnershipWithTraits" 
-H  "accept: application/json"

Path Params :

• chain : chain to work with. Either ALGORAND_TESTNET , ALGORAND_BETANET, ALGORAND_MAINNET

• assetId : The id of the Asset

• address : Address of the NFT holder

• trait : trait type

• value : the value of the trait

Example :

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/ALGORAND_TESTNET/verifyNftOwnershipWithTraits?assetId=257177850&account=GYFVJLKGSWQDHFBHBLABUXYHHSU544RV3WH4ZCF3S6HONSDP73TK4VGY3Y&trait=size&value=9814" 
-H  "accept: application/json"

Kotlin

import id.walt.nftkit.services.AlgorandNftService
import id.walt.nftkit.services.AlgorandChain


val assetId = "257177850"
val address = "GYFVJLKGSWQDHFBHBLABUXYHHSU544RV3WH4ZCF3S6HONSDP73TK4VGY3Y"

val traitType = "cap"
val traitValue = "red"
    
val result = AlgorandNftService.verifyOwnerShipWithTraits(address , assetId, AlgorandChain.TESTNET , traitType, traitValue)
println(result)

NFT ownership verification Based on Creator Address :

This Endpoint will verify if a given account has an NFT minted from a particular account .

REST API

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "https://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/{chain}/{address}/verifyNftOwnershipBasedOnCreator/{creatorAddress}"
-H  "accept: application/json"

Path Params :

• chain : chain to work with. Either ALGORAND_TESTNET , ALGORAND_BETANET, ALGORAND_MAINNET

• address : Address of the NFT holder

• creatorAddress : The initial creator address

Example :

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/ALGORAND_TESTNET/PVY6K7CB4JDRSOSPM7HZPTAOVDMVGHPF7TN6O5CBMD7UEDJWHOCRWI2OU4/verifyNftOwnershipBasedOnCreator/GYFVJLKGSWQDHFBHBLABUXYHHSU544RV3WH4ZCF3S6HONSDP73TK4VGY3Y" 
-H  "accept: application/json"

NFT Metadata verification Against Dynamic Policy :

REST API

API Doc

Swagger Doc | ReDoc

Curl call example

curl -X GET "https://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/{chain}/token/{token id}/policy/{policyName}/verification"
-H  "accept: application/json"

Path Params :

• chain : chain to work with. Either ALGORAND_TESTNET , ALGORAND_BETANET, ALGORAND_MAINNET

• token id : the token id

• policyName : Name of the policy you want to verify against

Example :

curl -X GET "http://0.0.0.0:7000/v2/nftkit/nft/verifier/algorand/chain/ALGORAND_TESTNET/token/287718643/policy/policy%20algorand/verification"
-H  "accept: application/json"

REGO

Code of the Rego policy that can be used for creating the dynamic policy :

{
  "name": "policy algorand",
  "description": "policy 1",
  "input": {
    "name": "waltid",
    "description" : "waltid nft on algorand#2"
         
  },
  "policy": "package app.nft

import future.keywords.if

default allow := false


allow if {
	valid_nft_name
	valid_nft_description
}


valid_nft_name if input.name= data.name
valid_nft_description if input.description= data.description



",
  "policyQuery": "data.app.nft.allow",
  "policyEngine": "OPA"
}