Merge pull request #299 from veerChauhan/develop

Author: skywinder

README.md

@@ -148,10 +148,10 @@ options.from = walletAddress
 options.gasPrice = .automatic
 options.gasLimit = .automatic
 let tx = contract.write(
-    "fallback",
-    parameters: [AnyObject](),
-    extraData: Data(),
-    transactionOptions: options)!
+"fallback",
+parameters: [AnyObject](),
+extraData: Data(),
+transactionOptions: options)!
 ```
 
 ##### Send ERC-20 Token
@@ -171,10 +171,10 @@ options.gasPrice = .automatic
 options.gasLimit = .automatic
 let method = "transfer"
 let tx = contract.write(
-    method,
-    parameters: [toAddress, amount] as [AnyObject],
-    extraData: Data(),
-    transactionOptions: options)!
+  method,
+  parameters: [toAddress, amount] as [AnyObject],
+  extraData: Data(),
+  transactionOptions: options)!
 ```
 
 
@@ -206,10 +206,79 @@ options.from = walletAddress
 options.gasPrice = .automatic
 options.gasLimit = .automatic
 let tx = contract.write(
-    contractMethod,
-    parameters: parameters,
-    extraData: extraData,
-    transactionOptions: options)!
+  contractMethod,
+  parameters: parameters,
+  extraData: extraData,
+  transactionOptions: options)!
+```
+
+
+####  Write Transaction with your custom contract ABI
+#### Requirement : Your custom contract ABI string
+```Code
+    func contractTransactionMethod(){
+        let yourCoin = self.yourbalance.text ?? "0.0" //Get token for sending
+        let userDir = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] //get user directory for keystore
+        if (FileManager.default.fileExists(atPath: userDir + "/keystore/key.json")) {
+            //Create Keystore
+            guard let manager = FilestoreWrapper.getKeystoreManager() else {
+                print("Manager not found ")
+                return
+            }
+            wethioKeystoreManager = manager
+            guard let urlStr = URL(string: "Your rpc url here") else { return }
+            guard let kManager = yourKeystoreManager else { return }
+            
+            //Create Web3Provider Instance with key manager
+            web3ProvideInstance = Web3HttpProvider(urlStr, keystoreManager: kManager)
+            guard let wProvier = self.web3ProvideInstance else {return}
+            self.web3Instance = Web3(provider: wProvier) //Set provide instance with web3
+            guard let wInstance = self.web3Instance else {return}
+            self.receiverAddressString = self.walletAddressTF.text //get receiver address string
+            print("Receiver address is : ", self.receiverAddressString ?? " ")
+            self.etheriumAccountAddress = self.wethioKeystoreManager?.addresses.first?.address  //get sender address in string
+            /*
+            convert address string into etherium addresss
+            */
+            let senderEthAddress = EthereumAddress(self.etheriumAccountAddress ?? "")
+            //Run on backgrounnd tread
+            DispatchQueue.global(qos: .background).async {
+                do {
+                    //Convert receiver address in to etherium address
+                    let toaddress = EthereumAddress(self.receiverAddressString ?? "")
+                    var options = Web3Options.defaultOptions() //Create web3 options
+                    let amountDouble = BigInt((Double(yourCoin) ?? 0.1)*pow(10, 18)) //Convert amount into BIGINT
+                    print("Total amount in double value : ", amountDouble)
+                    var amount = BigUInt.init(amountDouble) //Convert amount in BIG UI Int
+                    let estimateGasPrice = try wInstance.eth.getGasPrice() //estimate gas price
+                    
+                    guard let eGasReult = self.estimatedGasResult else {
+                        print("Unable to find gas price")
+                        return
+                    }
+                    let nonce = try wInstance.eth.getTransactionCount(address: senderEthAddress) //Get nonce or transaction count
+                    print("Is the Transaction count", nonce)
+                    let fee = estimateGasPrice * eGasReult
+                    /*
+                     adding
+                     - sender address
+                     - Gas Result
+                     - Gas price
+                     - amount
+                     */
+                    var sendTransactionIntermediateOptions = Web3Options.defaultOptions()
+                    sendTransactionIntermediateOptions.from = senderEthAddress
+                    sendTransactionIntermediateOptions.gasLimit = eGasReult
+                    sendTransactionIntermediateOptions.gasPrice = estimateGasPrice
+                    var tokenTransactionIntermediate: TransactionIntermediate! //Create transaction intermediate
+                    tokenTransactionIntermediate = try wInstance.contract("Your custom contract ABI string", at: contractAddress).method("transfer", args: toaddress, amount, options: sendTransactionIntermediateOptions)
+                    let mainTransaction = try tokenTransactionIntermediate.send(options: sendTransactionIntermediateOptions, onBlock: "latest")
+                    print(mainTransaction.hash, "is the hash of your transaction")
+                }
+            }
+        }
+    }
+
 ```
 
 ### Web3View example
@@ -322,7 +391,7 @@ You are more than welcome to participate! **Your contribution will be paid via
 
 - [ ] Convenient methods for namespaces
 
-  
+
 
 ## Credits