Work in progress for integrating exchange

Trust.xcodeproj/project.pbxproj

@@ -66,6 +66,8 @@
 		293112171FC5555500966EEA /* ExchangeTokensViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 293112161FC5555500966EEA /* ExchangeTokensViewModel.swift */; };
 		293112191FC55E5500966EEA /* SelectTokenViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 293112181FC55E5500966EEA /* SelectTokenViewController.swift */; };
 		2931121B1FC560E500966EEA /* ExchangeTokenTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2931121A1FC560E500966EEA /* ExchangeTokenTableViewCell.swift */; };
+		2931121D1FC65F2900966EEA /* ExchangeCurrencyView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2931121C1FC65F2900966EEA /* ExchangeCurrencyView.swift */; };
+		293112201FC6619000966EEA /* ExchangeToken.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2931121F1FC6619000966EEA /* ExchangeToken.swift */; };
 		293204581F8DC6B20095B7C1 /* ExchangeRateCoordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 293204571F8DC6B20095B7C1 /* ExchangeRateCoordinator.swift */; };
 		2932045C1F8DCD6E0095B7C1 /* CurrencyRate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2932045B1F8DCD6E0095B7C1 /* CurrencyRate.swift */; };
 		2932045E1F8EEE760095B7C1 /* BalanceCoordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2932045D1F8EEE760095B7C1 /* BalanceCoordinator.swift */; };
@@ -324,6 +326,8 @@
 		293112161FC5555500966EEA /* ExchangeTokensViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ExchangeTokensViewModel.swift; sourceTree = "<group>"; };
 		293112181FC55E5500966EEA /* SelectTokenViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SelectTokenViewController.swift; sourceTree = "<group>"; };
 		2931121A1FC560E500966EEA /* ExchangeTokenTableViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ExchangeTokenTableViewCell.swift; sourceTree = "<group>"; };
+		2931121C1FC65F2900966EEA /* ExchangeCurrencyView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ExchangeCurrencyView.swift; sourceTree = "<group>"; };
+		2931121F1FC6619000966EEA /* ExchangeToken.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ExchangeToken.swift; sourceTree = "<group>"; };
 		293204571F8DC6B20095B7C1 /* ExchangeRateCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ExchangeRateCoordinator.swift; sourceTree = "<group>"; };
 		2932045B1F8DCD6E0095B7C1 /* CurrencyRate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CurrencyRate.swift; sourceTree = "<group>"; };
 		2932045D1F8EEE760095B7C1 /* BalanceCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BalanceCoordinator.swift; sourceTree = "<group>"; };
@@ -854,6 +858,14 @@
 			path = ViewModels;
 			sourceTree = "<group>";
 		};
+		2931121E1FC6618800966EEA /* Types */ = {
+			isa = PBXGroup;
+			children = (
+				2931121F1FC6619000966EEA /* ExchangeToken.swift */,
+			);
+			path = Types;
+			sourceTree = "<group>";
+		};
 		293248881F88D586008A9818 /* Types */ = {
 			isa = PBXGroup;
 			children = (
@@ -1152,6 +1164,7 @@
 		298543011FC15F5300CB5081 /* Exchange */ = {
 			isa = PBXGroup;
 			children = (
+				2931121E1FC6618800966EEA /* Types */,
 				2985430D1FC18A3C00CB5081 /* ViewModels */,
 				298543081FC1888700CB5081 /* Views */,
 				298543051FC15FA200CB5081 /* ViewControllers */,
@@ -1184,6 +1197,7 @@
 				2985430B1FC188D200CB5081 /* ExchangeTokensField.swift */,
 				298543091FC188A700CB5081 /* ExchangeTokenInputField.swift */,
 				2931121A1FC560E500966EEA /* ExchangeTokenTableViewCell.swift */,
+				2931121C1FC65F2900966EEA /* ExchangeCurrencyView.swift */,
 			);
 			path = Views;
 			sourceTree = "<group>";
@@ -1924,6 +1938,7 @@
 				290B2B5F1F9177860053C83E /* UIImage.swift in Sources */,
 				291F52B21F6B814300B369AB /* MG Benchmark Tools.swift in Sources */,
 				291ED08F1F6F613200E7E93A /* GetTransactionRequest.swift in Sources */,
+				2931121D1FC65F2900966EEA /* ExchangeCurrencyView.swift in Sources */,
 				293112171FC5555500966EEA /* ExchangeTokensViewModel.swift in Sources */,
 				295A59381F71C1B90092F0FC /* AccountsCoordinator.swift in Sources */,
 				296421971F70C1F200EB363B /* ErrorView.swift in Sources */,
@@ -2054,6 +2069,7 @@
 				29850D2B1F6B30FF00791A49 /* TransactionViewController.swift in Sources */,
 				29C80D411FB2E1610037B1E0 /* EthplorerService.swift in Sources */,
 				296AF9AB1F7380920058AF78 /* GetTransactionCountRequest.swift in Sources */,
+				293112201FC6619000966EEA /* ExchangeToken.swift in Sources */,
 				298542F51FBD8E6A00CB5081 /* ConfigExplorer.swift in Sources */,
 				29A13E2C1F6A955700E432A2 /* CreateWalletViewModel.swift in Sources */,
 				29C80D4F1FB520AF0037B1E0 /* BalanceTokenViewModel.swift in Sources */,

Trust/Assets.xcassets/chevron-right.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "chevron-right.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Trust/Exchange/ViewControllers/ExchangeViewController.swift

@@ -7,28 +7,35 @@ class ExchangeViewController: UIViewController {
 
     private let viewModel = ExchangeViewModel()
     let exchangeFields = ExchangeTokensField()
+    let currencyView = ExchangeCurrencyView()
     let coordinator = ExchangeToksnCoordinator()
 
     init() {
         super.init(nibName: nil, bundle: nil)
 
         exchangeFields.translatesAutoresizingMaskIntoConstraints = false
-        view.addSubview(exchangeFields)
+
+        let stackView = UIStackView(arrangedSubviews: [
+            exchangeFields,
+            .spacer(height: 20),
+            currencyView,
+        ])
+        stackView.axis = .vertical
+        stackView.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(stackView)
 
         NSLayoutConstraint.activate([
-            exchangeFields.topAnchor.constraint(equalTo: view.layoutGuide.topAnchor, constant: 20),
+            stackView.topAnchor.constraint(equalTo: view.layoutGuide.topAnchor, constant: 20),
-            exchangeFields.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
+            stackView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
-            exchangeFields.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
+            stackView.bottomAnchor.constraint(lessThanOrEqualTo: view.bottomAnchor, constant: -20),
+            stackView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20),
         ])
 
-        exchangeFields.didPressSwap = { [unowned self] in
+        exchangeFields.didPress = { [unowned self] direction in
-            self.coordinator.swap()
+            self.showSelectToken(direction: direction)
-        }
-        exchangeFields.didPressFrom = { [unowned self] in
-            self.showSelectToken(direction: .from)
         }
-        exchangeFields.didPressTo = { [unowned self] in
+        exchangeFields.didPressAvailableBalance = { [unowned self] _ in
-            self.showSelectToken(direction: .to)
+            self.exchangeFields.fromField.amountField.text = "\(self.coordinator.viewModel.availableBalance)"
         }
 
         coordinator.didUpdate = { [weak self] viewModel in
@@ -39,11 +46,18 @@ class ExchangeViewController: UIViewController {
 
         view.backgroundColor = viewModel.backgroundColor
         navigationItem.title = viewModel.title
+        exchangeFields.backgroundColor = .white
     }
 
     func configure(viewModel: ExchangeTokensViewModel) {
-        exchangeFields.to.symbolLabel.text = viewModel.toSymbol
+        exchangeFields.fromField.symbolLabel.text = viewModel.fromSymbol
-        exchangeFields.from.symbolLabel.text = viewModel.fromSymbol
+        exchangeFields.toField.symbolLabel.text = viewModel.toSymbol
+
+        exchangeFields.fromField.backgroundColor = Colors.veryLightGray
+        exchangeFields.toField.backgroundColor = Colors.veryLightGray
+
+        exchangeFields.availableBalanceLabel.attributedText = viewModel.attributedAvailableBalance
+        currencyView.currencyLabel.attributedText = viewModel.attributedCurrency
     }
 
     func showSelectToken(direction: SelectTokenDirection) {
@@ -63,5 +77,6 @@ class ExchangeViewController: UIViewController {
 extension ExchangeViewController: SelectTokenViewControllerDelegate {
     func didSelect(token: ExchangeToken, in viewController: SelectTokenViewController) {
         coordinator.changeToken(direction: viewController.direction, token: token)
+        navigationController?.popViewController(animated: true)
     }
 }

Trust/Exchange/ViewControllers/SelectTokenViewController.swift

@@ -54,11 +54,6 @@ class SelectTokenViewController: UITableViewController {
     override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
         let token = tokens[indexPath.row]
         tableView.deselectRow(at: indexPath, animated: true)
-
-        NSLog("didSelectRowAt \(token)")
-
         delegate?.didSelect(token: token, in: self)
-
-        navigationController?.popViewController(animated: true)
     }
 }

Trust/Exchange/ViewModels/ExchangeTokensViewModel.swift

@@ -1,12 +1,8 @@
 // Copyright SIX DAY LLC. All rights reserved.
 
 import Foundation
-
+import UIKit
-struct ExchangeToken {
+import BonMot
-    let name: String
-    let symbol: String
-    let balance: Double
-}
 
 struct ExchangeTokensViewModel {
 
@@ -28,4 +24,28 @@ struct ExchangeTokensViewModel {
     var toSymbol: String {
         return to.symbol
     }
+
+    var attributedCurrency: NSAttributedString {
+        let baseStyle = StringStyle(
+            .lineHeightMultiple(1.2),
+            .font(UIFont.systemFont(ofSize: 15))
+        )
+        let greenStyle = baseStyle.byAdding(.color(Colors.green))
+
+        let conversationString = "1 \(fromSymbol) = 0.017648 \(toSymbol) ".styled(with: baseStyle)
+        let percentString = "(-%)".styled(with: greenStyle)
+
+        return (conversationString + percentString).styled(with: .alignment(.center))
+    }
+
+    var availableBalance: Double {
+        return 2.22
+    }
+
+    var attributedAvailableBalance: NSAttributedString {
+        return NSAttributedString(
+            string: "Available \(availableBalance) \(fromSymbol)",
+            attributes: [:]
+        )
+    }
 }

Trust/Exchange/Views/ExchangeTokenInputField.swift

@@ -4,13 +4,10 @@ import UIKit
 
 class ExchangeTokenInputField: UIView {
 
-    let floatLabelView = UIView()
-    let destinationLabel = UILabel()
     let amountField = UITextField()
-
-    let tokenView = UIView()
     let tokenImageView = UIImageView()
     let symbolLabel = UILabel()
+    let chevronDownImageView = UIImageView(image: R.image.chevronRight())
 
     var didPress: (() -> Void)?
 
@@ -18,100 +15,75 @@ class ExchangeTokenInputField: UIView {
 
         super.init(frame: .zero)
 
-        // value
-
-        floatLabelView.translatesAutoresizingMaskIntoConstraints = false
-
-        destinationLabel.translatesAutoresizingMaskIntoConstraints = false
-
         amountField.translatesAutoresizingMaskIntoConstraints = false
-        amountField.backgroundColor = .red
+        amountField.placeholder = "0"
-        amountField.font = UIFont.systemFont(ofSize: 26, weight: UIFontWeightMedium)
+        amountField.font = UIFont.systemFont(ofSize: 22, weight: UIFontWeightMedium)
-
-        let inputStackView = UIStackView(arrangedSubviews: [
-            destinationLabel,
-            amountField,
-        ])
-        inputStackView.translatesAutoresizingMaskIntoConstraints = false
-        inputStackView.axis = .vertical
-        inputStackView.spacing = 5
-
-        addSubview(floatLabelView)
-        floatLabelView.addSubview(inputStackView)
-
-        NSLayoutConstraint.activate([
-            inputStackView.centerYAnchor.constraint(equalTo: floatLabelView.centerYAnchor),
-            inputStackView.leadingAnchor.constraint(equalTo: floatLabelView.leadingAnchor),
-            inputStackView.trailingAnchor.constraint(equalTo: floatLabelView.trailingAnchor, constant: -15),
-
-            floatLabelView.topAnchor.constraint(equalTo: topAnchor),
-            floatLabelView.leadingAnchor.constraint(equalTo: leadingAnchor),
-            floatLabelView.bottomAnchor.constraint(equalTo: bottomAnchor),
-        ])
-
-        // token view
 
         symbolLabel.translatesAutoresizingMaskIntoConstraints = false
         symbolLabel.textAlignment = .center
-        symbolLabel.text = "ETH"
+        symbolLabel.font = UIFont.systemFont(ofSize: 16, weight: UIFontWeightMedium)
+        symbolLabel.adjustsFontSizeToFitWidth = true
 
         tokenImageView.translatesAutoresizingMaskIntoConstraints = false
         tokenImageView.image = R.image.accounts_active()
+        tokenImageView.contentMode = .scaleAspectFit
+
+        chevronDownImageView.translatesAutoresizingMaskIntoConstraints = false
+        chevronDownImageView.contentMode = .scaleAspectFit
+        chevronDownImageView.alpha = 0.5
 
-        tokenView.translatesAutoresizingMaskIntoConstraints = false
+        let divider: UIView = .spacerWidth(1, backgroundColor: .lightGray)
-        tokenView.backgroundColor = .green
 
         let tokenStackView = UIStackView(arrangedSubviews: [
             tokenImageView,
             symbolLabel,
+            chevronDownImageView,
         ])
         tokenStackView.translatesAutoresizingMaskIntoConstraints = false
-        tokenStackView.axis = .vertical
+        tokenStackView.axis = .horizontal
         tokenStackView.spacing = 5
 
-        tokenView.addSubview(tokenStackView)
+        let stackView = UIStackView(arrangedSubviews: [
-        addSubview(tokenView)
+            amountField,
+            divider,
+            tokenStackView,
+        ])
+        stackView.translatesAutoresizingMaskIntoConstraints = false
+        stackView.axis = .horizontal
+        stackView.alignment = .center
+        stackView.spacing = 5
+        addSubview(stackView)
 
-        let chevronDownImageView = UIImageView(image: R.image.chevronDown())
+        NSLayoutConstraint.activate([
-        chevronDownImageView.translatesAutoresizingMaskIntoConstraints = false
+            stackView.topAnchor.constraint(equalTo: topAnchor),
+            stackView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: StyleLayout.sideMargin),
+            stackView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -StyleLayout.sideMargin),
+            stackView.bottomAnchor.constraint(equalTo: bottomAnchor),
+            stackView.heightAnchor.constraint(equalToConstant: 60),
 
-        tokenView.addSubview(chevronDownImageView)
+            amountField.widthAnchor.constraint(equalToConstant: 120),
 
-        NSLayoutConstraint.activate([
+            symbolLabel.widthAnchor.constraint(equalToConstant: 50),
-            tokenStackView.centerXAnchor.constraint(equalTo: tokenView.centerXAnchor),
-            tokenStackView.centerYAnchor.constraint(equalTo: tokenView.centerYAnchor),
 
-            tokenView.topAnchor.constraint(equalTo: topAnchor),
+            divider.topAnchor.constraint(equalTo: topAnchor, constant: StyleLayout.sideMargin),
-            tokenView.trailingAnchor.constraint(equalTo: trailingAnchor),
+            divider.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -StyleLayout.sideMargin),
-            tokenView.bottomAnchor.constraint(equalTo: bottomAnchor),
-            tokenView.widthAnchor.constraint(equalToConstant: 100),
-            tokenView.leadingAnchor.constraint(equalTo: floatLabelView.trailingAnchor),
 
-            chevronDownImageView.leadingAnchor.constraint(equalTo: tokenStackView.trailingAnchor),
+            tokenImageView.heightAnchor.constraint(equalToConstant: 36),
-            chevronDownImageView.centerYAnchor.constraint(equalTo: tokenStackView.centerYAnchor),
+            tokenImageView.widthAnchor.constraint(equalToConstant: 36),
+
+            chevronDownImageView.centerYAnchor.constraint(equalTo: stackView.centerYAnchor),
+            chevronDownImageView.heightAnchor.constraint(equalToConstant: 12),
+            chevronDownImageView.widthAnchor.constraint(equalToConstant: 12),
         ])
 
         // main stack
 
-        let stackView = UIStackView(arrangedSubviews: [
+        tokenStackView.addGestureRecognizer(
-            floatLabelView,
-            tokenView,
-        ])
-        stackView.translatesAutoresizingMaskIntoConstraints = false
-        stackView.axis = .horizontal
-        stackView.addGestureRecognizer(
             UITapGestureRecognizer(target: self, action: #selector(self.tap))
         )
 
-        addSubview(stackView)
+        layer.cornerRadius = 5
-
+        layer.masksToBounds = true
-        NSLayoutConstraint.activate([
-            stackView.topAnchor.constraint(equalTo: topAnchor),
-            stackView.leadingAnchor.constraint(equalTo: leadingAnchor),
-            stackView.trailingAnchor.constraint(equalTo: trailingAnchor),
-            stackView.bottomAnchor.constraint(equalTo: bottomAnchor),
-            stackView.heightAnchor.constraint(equalToConstant: 100),
-        ])
     }
 
     func tap() {

Trust/Exchange/Views/ExchangeTokensField.swift

@@ -4,58 +4,63 @@ import UIKit
 
 class ExchangeTokensField: UIView {
 
-    let from = ExchangeTokenInputField()
+    let fromField = ExchangeTokenInputField()
-    let to = ExchangeTokenInputField()
+    let toField = ExchangeTokenInputField()
-    let swapButton = UIButton()
+
-
+    lazy var availableBalanceLabel: UILabel = {
-    var didPressSwap: (() -> Void)?
+        let label = UILabel()
-    var didPressTo: (() -> Void)?
+        label.translatesAutoresizingMaskIntoConstraints = false
-    var didPressFrom: (() -> Void)?
+        label.addGestureRecognizer(
+            UITapGestureRecognizer(target: self, action: #selector(self.availableBalance))
+        )
+        label.isUserInteractionEnabled = true
+        return label
+    }()
+
+    var didPress: ((SelectTokenDirection) -> Void)?
+    var didPressAvailableBalance: (() -> Void)?
 
     init() {
 
         super.init(frame: .zero)
 
-        from.translatesAutoresizingMaskIntoConstraints = false
+        fromField.translatesAutoresizingMaskIntoConstraints = false
-        from.destinationLabel.text = "You send"
+        toField.translatesAutoresizingMaskIntoConstraints = false
-
-        to.translatesAutoresizingMaskIntoConstraints = false
-        to.destinationLabel.text = "You get"
-
-        swapButton.translatesAutoresizingMaskIntoConstraints = false
-        swapButton.setImage(R.image.swap(), for: .normal)
-        swapButton.addTarget(self, action: #selector(swap), for: .touchUpInside)
-        swapButton.layer.cornerRadius = 20
-        swapButton.backgroundColor = .white
 
         let stackView = UIStackView(arrangedSubviews: [
-            from,
+            destinationLabel(text: "From"),
-            to,
+            fromField,
+            availableBalanceLabel,
+            .spacer(height: 0),
+            destinationLabel(text: "To"),
+            toField,
         ])
         stackView.translatesAutoresizingMaskIntoConstraints = false
+        stackView.spacing = 10
         stackView.axis = .vertical
 
-        from.didPress = { [unowned self] in self.didPressFrom?() }
+        fromField.didPress = { [unowned self] in self.didPress?(.from) }
-        to.didPress = { [unowned self] in self.didPressTo?() }
+        toField.didPress = { [unowned self] in self.didPress?(.to) }
 
         addSubview(stackView)
-        addSubview(swapButton)
 
         NSLayoutConstraint.activate([
             stackView.topAnchor.constraint(equalTo: topAnchor),
             stackView.leadingAnchor.constraint(equalTo: leadingAnchor),
             stackView.trailingAnchor.constraint(equalTo: trailingAnchor),
             stackView.bottomAnchor.constraint(equalTo: bottomAnchor),
-
-            swapButton.centerYAnchor.constraint(equalTo: stackView.centerYAnchor),
-            swapButton.trailingAnchor.constraint(equalTo: stackView.trailingAnchor, constant: -80),
-            swapButton.widthAnchor.constraint(equalToConstant: 40),
-            swapButton.heightAnchor.constraint(equalToConstant: 40),
         ])
     }
 
-    func swap() {
+    private func destinationLabel(text: String) -> UILabel {
-        didPressSwap?()
+        let label = UILabel()
+        label.translatesAutoresizingMaskIntoConstraints = false
+        label.text = text
+        return label
+    }
+
+    func availableBalance() {
+        didPressAvailableBalance?()
     }
 
     required init?(coder aDecoder: NSCoder) {

Trust/Extensions/UIView.swift

@@ -29,18 +29,20 @@ extension UIView {
         }
     }
 
-    static func spacer(height: CGFloat = 1) -> UIView {
+    static func spacer(height: CGFloat = 1, backgroundColor: UIColor = .clear) -> UIView {
         let view = UIView(frame: .zero)
         view.translatesAutoresizingMaskIntoConstraints = false
+        view.backgroundColor = backgroundColor
         NSLayoutConstraint.activate([
             view.heightAnchor.constraint(equalToConstant: height),
         ])
         return view
     }
 
-    static func spacerWidth(_ width: CGFloat = 1) -> UIView {
+    static func spacerWidth(_ width: CGFloat = 1, backgroundColor: UIColor = .clear) -> UIView {
         let view = UIView(frame: .zero)
         view.translatesAutoresizingMaskIntoConstraints = false
+        view.backgroundColor = backgroundColor
 
         NSLayoutConstraint.activate([
             view.widthAnchor.constraint(equalToConstant: width),

Trust/Style/AppStyle.swift

@@ -25,6 +25,7 @@ struct Colors {
     static let veryLightOrange = UIColor(hex: "FFECC9")
     static let green = UIColor(hex: "2fbb4f")
     static let lightGray = UIColor.lightGray
+    static let veryLightGray = UIColor(hex: "F6F6F6")
     static let gray = UIColor.gray
     static let darkGray = UIColor(hex: "606060")
     static let black = UIColor(hex: "313849")

Trust/Transfer/Controllers/RequestViewController.swift

@@ -106,7 +106,7 @@ class RequestViewController: UIViewController {
 
     func changeQRCode(value: Int) {
         let string = "\(account.address.address)"
-        
+
         // EIP67 format not being used much yet, use hex value for now
         // let string = "ethereum:\(account.address.address)?value=\(value)"