Send Transaction issue, processingError(desc: "Failed to fetch gas estimate")

[Najim-hub]

Attached is the proper code, and this is my method; I've gone through the recent case and tried everything and it doesn't work, can someone help me?
` */
let value: String = "0.000000033" // In Ether
let walletAddress = EthereumAddress(self.AccountNumber)! // Your wallet address
let toAdres = EthereumAddress(/To Address/)!
let contract = Web3.InfuraMainnetWeb3().contract(Web3.Utils.coldWalletABI, at: toAdres, abiVersion: 2)!

                let amount = Web3.Utils.parseToBigUInt(value, units: .eth)
                var options = TransactionOptions.defaultOptions
        options.value = amount
        options.from = walletAddress
        options.gasPrice = .automatic
        options.gasLimit = .automatic

                // @@@ use [fallback](see [web3swift/Web3/Web3+Utils.swift])
                let tx = contract.write("fallback"/*"transfer"*/, parameters: [AnyObject](), extraData: Data(), transactionOptions: options)

                do {
                    // @@@ write transaction requires password, because it consumes gas
                    let transaction = try tx?.send( password: self.Password )
                    
                    print("output", transaction?.transaction.description as Any)
                } catch(let err) {
                  print("err", err)
                }
            }
}`

[AlleniCode]

I can't see what's wrong with your code, make sure your internet connection is ok, or you can try this for test:

options.gasLimit = .manual(BigUInt(21000))
options.gasPrice = .manual(BigUInt(30000000000))

[dangell7]

99% this is issue with parameters. To properly diagnose your issue we would need the ABI for the specific function or smart contract .sol

[Iysbaera]

Hey, @Najim-hub have your initial issue been resolved? Please let us know if it can be closed.

If you still experience any problems, feel free to add more details in this issue or open another one.