How do I fetch information such as balance, decimal,symbol and name of ERC20token ?

[DiwakarThapa]

By changing the method in following code we can fetch the balance , decimal , symbol and name of ERC20Token. Is there any way to fetch all at once instead of changing method all the time?

   if let address = tokenAddress,
            let walletAddress = self.publicAddress {
            let exploredAddress = EthereumAddress(walletAddress)
            let erc20TokenAddress = EthereumAddress(address)
            guard let tokenContract = web3?.contract(Web3.Utils.erc20ABI, at: erc20TokenAddress, abiVersion: 2) else {
                print("error no created token address")
                return
            }
            var options = Web3Options.defaultOptions()
            options.from = EthereumAddress(walletAddress)
            let method = "balanceOf"
            let transactionContract = tokenContract.method(method, parameters: [exploredAddress] as [AnyObject], options: options)
            DispatchQueue.main.async {
                let results =  transactionContract?.call(options: options)
                switch results! {
                    
                case .success(let response):
                    #warning("decimals fetch from contract!")
                    
                                        let tokenBalance = "\(response.map({$0}).first?.value)"
                                        let actualTknBalance = CGFloat(BigUInt(tokenBalance)! / BigUInt(10000000))
                    completion("\(actualTknBalance)")
                    
                    
                case .failure(let failure):
                    print(failure.localizedDescription)
                }
                
            }
            
            
        }

[BaldyAsh]

Hi, @DiwakarThapa . Sorry, I was on my vacation.
Yes, you can, except balance:

let web3 = Web3.InfuraMainnetWeb3()
let token = ERC20(web3: web3, provider: Web3.InfuraMainnetWeb3().provider, address: EthereumAddress("0x8932404A197D84Ec3Ea55971AADE11cdA1dddff1")!)
token.readProperties()
print(token.decimals)
print(token.symbol)
print(token.name)

For balance use this:

let balance = token.getBalance(account: <EthereumAddress>)

[liuwei-1035]

HI @BaldyAsh
I user this to get ERC20 balance
let balance = token.getBalance(account: )
in bsc chain It worked
but in gate.io RPC: https://evm.gatenode.cc node: 86, it throw in web3.Eth class callPromise method.
web3swift.Web3Error.nodeError(desc: "{"codespace":"framework","code":1,"message":"gas price cannot be 0"}")
I user method 'Get ERC20 token balance' example it error too
Can you help me how to solve the problem?

[liuwei-1035]

ContractAddress: 0x669eb09082798178d006ea5526ce0fc12ff42871

[yaroslavyaroslav]

@PigWithCabbage please open a new one issue about your situation.