package ethcli

import (

"context"

"math/big"

"strings"

"github.com/ethereum/go-ethereum"

"github.com/ethereum/go-ethereum/accounts/abi"

"github.com/ethereum/go-ethereum/common"

)

var (

openzeppelinERC721URIStorageAbi = `[{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]`

)

// ERC721TokenURI

// for ERC721Metadata && ERC721URIStorage

func (cli *EvmClient) ERC721TokenURI(ctx context.Context, token string, tokenId *big.Int, blockNumber *big.Int) (string, error) {

ins, err := abi.JSON(strings.NewReader(openzeppelinERC721URIStorageAbi))

if err != nil {

return "", err

}

data, _ := ins.Pack("tokenURI", tokenId)

contract := common.HexToAddress(token)

bz, err := cli.CallContract(ctx, ethereum.CallMsg{

To: &contract,

Data: data,

}, blockNumber)

if err != nil {

return "", err

}

results, err := ins.Unpack("tokenURI", bz)

if err != nil {

return "", err

}

return results[0].(string), nil

}