Send ETH to contract address.

[rachkumar]

Hi,

I need to send ETH to contract address..But am getting issue as failed to fetch gas estimate.

My code:

    let walletAddress = keystoreManager.addresses![0]
            
    let contractABI = Web3Utils.erc20ABI // Contract ABI
    let contractAddressVal = EthereumAddress(contractAddress)!
    let abiVersion = 2 // Contract ABI version
    let contract = web3Main.contract(contractABI, at: contractAddressVal, abiVersion: abiVersion)!
    let amount = Web3.Utils.parseToBigUInt(value, units: .eth)
    var options = TransactionOptions.defaultOptions
    options.value = amount
    options.from = walletAddress
    options.gasPrice = .manual(BigUInt("10000000000"))
    options.gasLimit = .manual(BigUInt("70000"))
    
    let tx = contract.write()!
      
    do {
        let transaction = try tx.send(password: "", transactionOptions: options)
        print("output", transaction)
    } catch(let err) {
      print("err", err)
    }
 
    Please help to sort this issue....

[skywinder]

Please have a look documentation section about this case:
send-ether

let value: String = "1.0" // In Ether
let walletAddress = EthereumAddress(wallet.address)! // Your wallet address
let toAddress = EthereumAddress(toAddressString)!
let contract = web3.contract(Web3.Utils.coldWalletABI, at: toAddress, 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
let tx = contract.write(
    "fallback",
    parameters: [AnyObject](),
    extraData: Data(),
    transactionOptions: options)!

[ravi-ranjan-oodles]

Hi Please check below code

Convert receiver address into Ethereum string

                `let toaddress = EthereumAddress(self.receiverAddressString ?? "")`

Create web3 options

                `var sendTransactionIntermediateOptions = Web3Options.defaultOptions()`

Convert amount into BIGINT

                `let amountDouble = BigInt((Double(sendigTokenCount) ?? 1.0)*pow(10, 18))`
                `print("Total amount in double value : ", amountDouble)`

Convert amount in BigUInt

                `let amount = BigUInt.init(amountDouble)`

get gas price
let estimateGasPrice = try wInstance.eth.getGasPrice() guard let contractString = self.contractAddressString else { print("Unable to get contract address") return }

Create your contract address as EthereumAddress

               `let contractAddress = EthereumAddress(contractString)
                guard let eGasReult = self.estimatedGasResult else {
                    print("Unable to find gas")
                    return
                }`

Get nonce

                print("estimated gas : ", eGasReult)
                let fee = estimateGasPrice * eGasReult
                print("Is the Transaction fees ", fee)

                 adding
                 - sender address
                 - Gas Result
                 - Gas price
                 - amount
                 

                `sendTransactionIntermediateOptions.from = senderEthAddress`
                `sendTransactionIntermediateOptions.gasLimit = eGasReult`
                `sendTransactionIntermediateOptions.gasPrice = estimateGasPrice`

Strat your Transaction with contract

                `var tokenTransactionIntermediate: TransactionIntermediate!`

tokenTransactionIntermediate = try wInstance.contract(Web3.Utils.yourABIString, at: contractAddress).method("transfer", args: toaddress, amount, options: sendTransactionIntermediateOptions)

[skywinder]

thanks @ravi-ranjan-oodles for the detailed comments.

It would be great if you can improve the documentation in this way. I would be happy to make a bounty for this task - just let me know if you are interested in (or make a PR)! 👍

[ravi-ranjan-oodles]

Sure @skywinder, I am Interested in updating the Documentation. Please let me know at https://github.com/veerChauhan id

[ravi-ranjan-oodles]

Hi, I have updated the documentation and made a pull request with the name veer chauhan. Hope for a bounty :D for this coming year :D Thanks *Ravi Ranjan**Sr. Associate Consultant - Development* *_______________________________________________________* <https://www.oodlestechnologies.com/> +91 9711734151live:.cid.ba8be0ea7047f0b5www.oodlestechnologies.com | www.oodlesmarketing.com | www.oodlesstudio.comUnit No. 159, Tower B1, Spaze I-Tech Park, Sector 49, Sohna Road, Gurgaon, India, 122018[image: Facebook icon] <https://www.linkedin.com/in/rranjanchchn/> [image: Youtbue icon] <https://www.facebook.com/OodlesTech> [image: LinkedIn icon] <https://twitter.com/ciggret_hai>

…

On Thu, Dec 31, 2020 at 12:48 PM Petr Korolev ***@***.***> wrote: thanks @ravi-ranjan-oodles <https://github.com/ravi-ranjan-oodles> for the detailed comments. It would be great if you can improve the documentation in this way. I would be happy to make a bounty for this task - just let me know if you are interested in (or make a PR)! 👍 — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#259 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/APADMZHYVF5VRMPXIZGOTYTSXQQVJANCNFSM4MG4W2QA> .