qml: consolidate multisig support into existing pages WCHaveSeed, WCHaveMasterKey, WCBIP39Refine.

Have these put cosigner data directly in the correct wizard_data leafs instead of relying on
wizard accept handlers.

electrum/gui/qml/components/wizard/WCBIP39Refine.qml

@@ -9,11 +9,18 @@ import "../controls"
 WizardComponent {
     valid: false
 
-    property bool isMultisig
+    property bool isMultisig: false
+    property int cosigner: 0
+    property int participants: 0
 
     function apply() {
-        wizard_data['script_type'] = scripttypegroup.checkedButton.scripttype
-        wizard_data['derivation_path'] = derivationpathtext.text
+        if (cosigner) {
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['script_type'] = scripttypegroup.checkedButton.scripttype
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['derivation_path'] = derivationpathtext.text
+        } else {
+            wizard_data['script_type'] = scripttypegroup.checkedButton.scripttype
+            wizard_data['derivation_path'] = derivationpathtext.text
+        }
     }
 
     function getScriptTypePurposeDict() {
@@ -37,7 +44,7 @@ WizardComponent {
         var p = isMultisig ? getMultisigScriptTypePurposeDict() : getScriptTypePurposeDict()
         if (!scripttypegroup.checkedButton.scripttype in p)
             return
-        if (!bitcoin.verify_derivation_path(derivationpathtext.text))
+        if (!bitcoin.verifyDerivationPath(derivationpathtext.text))
             return
         valid = true
     }
@@ -76,13 +83,20 @@ WizardComponent {
             id: mainLayout
             width: parent.width
 
-            Label { text: qsTr('Script type and Derivation path') }
+            Label {
+                text: qsTr('Script type and Derivation path')
+            }
             Button {
                 text: qsTr('Detect Existing Accounts')
                 enabled: false
                 visible: !isMultisig
             }
-            Label { text: qsTr('Choose the type of addresses in your wallet.') }
+
+            Label {
+                text: qsTr('Choose the type of addresses in your wallet.')
+            }
+
+            // standard
             RadioButton {
                 ButtonGroup.group: scripttypegroup
                 property string scripttype: 'p2pkh'
@@ -102,6 +116,8 @@ WizardComponent {
                 text: qsTr('native segwit (p2wpkh)')
                 visible: !isMultisig
             }
+
+            // multisig
             RadioButton {
                 ButtonGroup.group: scripttypegroup
                 property string scripttype: 'p2sh'
@@ -121,11 +137,13 @@ WizardComponent {
                 text: qsTr('native segwit multisig (p2wsh)')
                 visible: isMultisig
             }
+
             InfoTextArea {
                 Layout.preferredWidth: parent.width
                 text: qsTr('You can override the suggested derivation path.') + ' ' +
                     qsTr('If you are not sure what this is, leave this field unchanged.')
             }
+
             TextField {
                 id: derivationpathtext
                 Layout.fillWidth: true
@@ -140,7 +158,12 @@ WizardComponent {
     }
 
     Component.onCompleted: {
-        isMultisig = 'multisig' in wizard_data && wizard_data['multisig'] == true
+        isMultisig = wizard_data['wallet_type'] == 'multisig'
+        if (isMultisig) {
+            participants = wizard_data['multisig_participants']
+            if ('multisig_current_cosigner' in wizard_data)
+                cosigner = wizard_data['multisig_current_cosigner']
+        }
     }
 }
 

electrum/gui/qml/components/wizard/WCCosignerKey.qml

@@ -1,19 +0,0 @@
-import QtQuick 2.6
-import QtQuick.Layouts 1.0
-import QtQuick.Controls 2.1
-
-import org.electrum 1.0
-
-import "../controls"
-
-WizardComponent {
-    id: root
-
-    valid: false
-
-    ColumnLayout {
-        Label {
-            text: qsTr('TODO: Cosigner key entry')
-        }
-    }
-}

electrum/gui/qml/components/wizard/WCCosignerKeystore.qml

@@ -17,6 +17,7 @@ WizardComponent {
     function apply() {
         wizard_data['cosigner_keystore_type'] = keystoregroup.checkedButton.keystoretype
         wizard_data['multisig_current_cosigner'] = cosigner
+        wizard_data['multisig_cosigner_data'][cosigner.toString()] = {}
     }
 
     ButtonGroup {

electrum/gui/qml/components/wizard/WCCosignerSeed.qml

@@ -1,30 +0,0 @@
-import QtQuick 2.6
-import QtQuick.Layouts 1.0
-import QtQuick.Controls 2.1
-
-import org.electrum 1.0
-
-import "../controls"
-
-WCHaveSeed {
-    id: root
-
-    headingtext: qsTr('Cosigner #%1 of %2').arg(cosigner).arg(participants)
-
-    property int cosigner: 0
-    property int participants: 0
-
-    function apply() {
-        console.log('apply fn called')
-        wizard_data['cosigner_seed'] = seed
-        wizard_data['cosigner_seed_variant'] = seed_variant
-        wizard_data['cosigner_seed_type'] = seed_type
-        wizard_data['cosigner_seed_extend'] = seed_extend
-        wizard_data['cosigner_seed_extra_words'] = seed_extra_words
-    }
-
-    Component.onCompleted: {
-        participants = wizard_data['multisig_participants']
-        cosigner = wizard_data['multisig_current_cosigner']
-    }
-}

electrum/gui/qml/components/wizard/WCHaveMasterKey.qml

@@ -11,18 +11,32 @@ WizardComponent {
 
     valid: false
 
+    property int cosigner: 0
+    property int participants: 0
+
     function apply() {
-        wizard_data['master_key'] = masterkey_ta.text
+        if (cosigner) {
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['master_key'] = masterkey_ta.text
+        } else {
+            wizard_data['master_key'] = masterkey_ta.text
+        }
     }
 
     function verifyMasterKey(key) {
-        return valid = bitcoin.verify_master_key(key)
+        return valid = bitcoin.verifyMasterKey(key.trim(), wizard_data['wallet_type'])
     }
 
     ColumnLayout {
         width: parent.width
 
-        Label { text: qsTr('Create keystore from a master key') }
+        Label {
+            text: qsTr('Cosigner #%1 of %2').arg(cosigner).arg(participants)
+            visible: cosigner
+        }
+
+        Label {
+            text: qsTr('Create keystore from a master key')
+        }
 
         RowLayout {
             TextArea {
@@ -59,6 +73,18 @@ WizardComponent {
                 }
             }
         }
+
+        TextArea {
+            id: validationtext
+            text: bitcoin.validationMessage
+            visible: bitcoin.validationMessage
+            Layout.fillWidth: true
+            readOnly: true
+            wrapMode: TextInput.WordWrap
+            background: Rectangle {
+                color: 'transparent'
+            }
+        }
     }
 
     Component {
@@ -83,4 +109,12 @@ WizardComponent {
     Bitcoin {
         id: bitcoin
     }
+
+    Component.onCompleted: {
+        if (wizard_data['wallet_type'] == 'multisig') {
+            if ('multisig_current_cosigner' in wizard_data)
+                cosigner = wizard_data['multisig_current_cosigner']
+            participants = wizard_data['multisig_participants']
+        }
+    }
 }

electrum/gui/qml/components/wizard/WCHaveSeed.qml

@@ -9,26 +9,27 @@ import "../controls"
 
 WizardComponent {
     id: root
+
     valid: false
 
     property bool is2fa: false
-
-    property string headingtext
-
-    // expose for WCCosignerSeed 'subclass'
-    property alias seed: seedtext.text
-    property alias seed_variant: seed_variant_cb.currentValue
-    property alias seed_type: bitcoin.seed_type
-    property alias seed_extend: extendcb.checked
-    property string seed_extra_words: extendcb.checked ? customwordstext.text : ''
+    property int cosigner: 0
+    property int participants: 0
 
     function apply() {
-        console.log('apply fn called (WCHaveSeed)')
-        wizard_data['seed'] = seedtext.text
-        wizard_data['seed_variant'] = seed_variant_cb.currentValue
-        wizard_data['seed_type'] = bitcoin.seed_type
-        wizard_data['seed_extend'] = extendcb.checked
-        wizard_data['seed_extra_words'] = extendcb.checked ? customwordstext.text : ''
+        if (cosigner) {
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed'] = seedtext.text
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_variant'] = seed_variant_cb.currentValue
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_type'] = bitcoin.seed_type
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extend'] = extendcb.checked
+            wizard_data['multisig_cosigner_data'][cosigner.toString()]['seed_extra_words'] = extendcb.checked ? customwordstext.text : ''
+        } else {
+            wizard_data['seed'] = seedtext.text
+            wizard_data['seed_variant'] = seed_variant_cb.currentValue
+            wizard_data['seed_type'] = bitcoin.seed_type
+            wizard_data['seed_extend'] = extendcb.checked
+            wizard_data['seed_extra_words'] = extendcb.checked ? customwordstext.text : ''
+        }
     }
 
     function setSeedTypeHelpText() {
@@ -69,8 +70,8 @@ WizardComponent {
 
             Label {
                 Layout.columnSpan: 2
-                visible: headingtext
-                text: headingtext
+                text: qsTr('Cosigner #%1 of %2').arg(cosigner).arg(participants)
+                visible: cosigner
             }
 
             Label {
@@ -129,7 +130,8 @@ WizardComponent {
             }
             TextArea {
                 id: validationtext
-                visible: text != ''
+                text: bitcoin.validationMessage
+                visible: bitcoin.validationMessage
                 Layout.fillWidth: true
                 readOnly: true
                 wrapMode: TextInput.WordWrap
@@ -157,7 +159,6 @@ WizardComponent {
         id: bitcoin
         onSeedTypeChanged: contentText.text = bitcoin.seed_type
         onSeedValidChanged: root.valid = bitcoin.seed_valid
-        onValidationMessageChanged: validationtext.text = bitcoin.validation_message
     }
 
     Timer {
@@ -168,8 +169,13 @@ WizardComponent {
     }
 
     Component.onCompleted: {
-        if (wizard_data['wallet_type'] == '2fa')
-            root.is2fa = true
+        if (wizard_data['wallet_type'] == '2fa') {
+            is2fa = true
+        } else if (wizard_data['wallet_type'] == 'multisig') {
+            participants = wizard_data['multisig_participants']
+            if ('multisig_current_cosigner' in wizard_data)
+                cosigner = wizard_data['multisig_current_cosigner']
+        }
         setSeedTypeHelpText()
     }
 

electrum/gui/qml/components/wizard/WCMultisig.qml

@@ -24,7 +24,6 @@ WizardComponent {
     }
 
     function apply() {
-        wizard_data['multisig'] = true
         wizard_data['multisig_participants'] = participants
         wizard_data['multisig_signatures'] = signatures
         wizard_data['multisig_cosigner_data'] = {}

electrum/gui/qml/components/wizard/WizardComponent.qml

@@ -14,14 +14,21 @@ Item {
         apply()
     }
 
+    // override this in descendants to put data from the view in wizard_data
     function apply() { }
+
     function checkIsLast() {
         apply()
         last = wizard.wiz.isLast(wizard_data)
     }
 
     Component.onCompleted: {
-        checkIsLast()
+        // NOTE: Use Qt.callLater to execute checkIsLast(), and by extension apply(),
+        // otherwise Component.onCompleted handler in descendants is processed
+        // _after_ apply() is called, which may lead to setting the wrong
+        // wizard_data keys if apply() depends on variables set in descendant
+        // Component.onCompleted handler.
+        Qt.callLater(checkIsLast)
     }
 
 }

electrum/gui/qml/qebitcoin.py

@@ -31,7 +31,7 @@ class QEBitcoin(QObject):
     seedType = ''
 
     validationMessageChanged = pyqtSignal()
-    validationMessage = ''
+    _validationMessage = ''
 
     @pyqtProperty('QString', notify=generatedSeedChanged)
     def generated_seed(self):
@@ -46,13 +46,13 @@ class QEBitcoin(QObject):
         return self.seedType
 
     @pyqtProperty('QString', notify=validationMessageChanged)
-    def validation_message(self):
-        return self.validationMessage
+    def validationMessage(self):
+        return self._validationMessage
 
-    @validation_message.setter
-    def validation_message(self, msg):
-        if self.validationMessage != msg:
-            self.validationMessage = msg
+    @validationMessage.setter
+    def validationMessage(self, msg):
+        if self._validationMessage != msg:
+            self._validationMessage = msg
             self.validationMessageChanged.emit()
 
     @pyqtSlot()
@@ -115,28 +115,34 @@ class QEBitcoin(QObject):
 
         self._logger.debug('seed verified: ' + str(seed_valid))
 
-    @pyqtSlot(str, result=bool)
     @pyqtSlot(str, str, result=bool)
-    def verify_master_key(self, key, wallet_type='standard'):
+    def verifyMasterKey(self, key, wallet_type='standard'):
         self.validationMessage = ''
         if not keystore.is_master_key(key):
             self.validationMessage = _('Not a master key')
             return False
 
+        k = keystore.from_master_key(key)
+        has_xpub = isinstance(k, keystore.Xpub)
+        assert has_xpub
+        t1 = xpub_type(k.xpub)
+
         if wallet_type == 'standard':
-            # validation message?
-            k = keystore.from_master_key(key)
-            has_xpub = isinstance(k, keystore.Xpub)
-            assert has_xpub
-            t1 = xpub_type(k.xpub)
             if t1 not in ['standard', 'p2wpkh', 'p2wpkh-p2sh']:
                 self.validationMessage = '%s: %s' % (_('Wrong key type'), t1)
                 return False
             return True
-        return False
+        elif wallet_type == 'multisig':
+            if t1 not in ['standard', 'p2wsh', 'p2wsh-p2sh']:
+                self.validationMessage = '%s: %s' % (_('Wrong key type'), t1)
+                return False
+            # TODO: check against other cosigner xpubs
+            return True
+
+        raise Exception(f'Unsupported wallet type: {wallet_type}')
 
     @pyqtSlot(str, result=bool)
-    def verify_derivation_path(self, path):
+    def verifyDerivationPath(self, path):
         return is_bip32_derivation(path)
 
     @pyqtSlot(str, result='QVariantMap')

electrum/gui/qml/qewizard.py

@@ -62,13 +62,9 @@ class QENewWalletWizard(NewWalletWizard, QEAbstractWizard):
             'multisig': { 'gui': 'WCMultisig' },
             'multisig_show_masterpubkey': { 'gui': 'WCShowMasterPubkey' },
             'multisig_cosigner_keystore': { 'gui': 'WCCosignerKeystore' },
-            'multisig_cosigner_key': { 'gui': 'WCCosignerKey' },
-            'multisig_cosigner_seed': { 'gui': 'WCCosignerSeed',
-                'accept': self.accept_cosigner_seed
-            },
-            'multisig_cosigner_bip39_refine': { 'gui': 'WCBIP39Refine',
-                'accept': self.accept_cosigner_bip39refine
-            },
+            'multisig_cosigner_key': { 'gui': 'WCHaveMasterKey' },
+            'multisig_cosigner_seed': { 'gui': 'WCHaveSeed' },
+            'multisig_cosigner_bip39_refine': { 'gui': 'WCBIP39Refine' },
             'imported': { 'gui': 'WCImport' },
             'wallet_password': { 'gui': 'WCWalletPassword' }
         })
@@ -86,21 +82,6 @@ class QENewWalletWizard(NewWalletWizard, QEAbstractWizard):
     def is_single_password(self):
         return self._daemon.singlePasswordEnabled
 
-    def accept_cosigner_seed(self, wizard_data):
-        self._logger.debug('accept_cosigner_seed')
-        cosigner = wizard_data['multisig_current_cosigner'] if 'multisig_current_cosigner' in wizard_data else 2
-        wizard_data['multisig_cosigner_data'][str(cosigner)] = {
-            'seed': wizard_data['cosigner_seed'],
-            'seed_variant': wizard_data['cosigner_seed_variant'],
-            'seed_type': wizard_data['cosigner_seed_type'],
-            'seed_extend': wizard_data['cosigner_seed_extend'],
-            'seed_extra_words': wizard_data['cosigner_seed_extra_words']
-        }
-
-    def accept_cosigner_bip39refine(self, wizard_data):
-        pass # TODO
-
-
     @pyqtSlot('QJSValue', bool, str)
     def createStorage(self, js_data, single_password_enabled, single_password):
         self._logger.info('Creating wallet from wizard data')

electrum/wizard.py

@@ -169,15 +169,19 @@ class NewWalletWizard(AbstractWizard):
             'multisig_show_masterpubkey': {
                 'next': 'multisig_cosigner_keystore'
             },
-            'multisig_cosigner_keystore': {
+            'multisig_cosigner_keystore': { # this view should set 'multisig_current_cosigner'
                 'next': self.on_cosigner_keystore_type
             },
             'multisig_cosigner_key': {
-                'next': lambda d: 'multisig_cosigner_keystore' if self.has_all_cosigner_data(d) else 'wallet_password',
+                'next': lambda d: 'wallet_password' if self.has_all_cosigner_data(d) else 'multisig_cosigner_keystore',
                 'last': lambda v,d: self.is_single_password() and self.has_all_cosigner_data(d)
             },
             'multisig_cosigner_seed': {
-                'next': lambda d: 'multisig_cosigner_keystore' if self.has_all_cosigner_data(d) else 'wallet_password',
+                'next': self.on_have_cosigner_seed,
+                'last': lambda v,d: self.is_single_password() and self.has_all_cosigner_data(d)
+            },
+            'multisig_cosigner_bip39_refine': {
+                'next': lambda d: 'wallet_password' if self.has_all_cosigner_data(d) else 'multisig_cosigner_keystore',
                 'last': lambda v,d: self.is_single_password() and self.has_all_cosigner_data(d)
             },
             'imported': {
@@ -202,7 +206,7 @@ class NewWalletWizard(AbstractWizard):
         return wizard_data['seed_variant'] == 'bip39'
 
     def is_multisig(self, wizard_data):
-        return 'multisig' in wizard_data and wizard_data['multisig'] is True
+        return wizard_data['wallet_type'] == 'multisig'
 
     def on_wallet_type(self, wizard_data):
         t = wizard_data['wallet_type']
@@ -236,8 +240,26 @@ class NewWalletWizard(AbstractWizard):
             'seed': 'multisig_cosigner_seed'
         }.get(t)
 
+    def on_have_cosigner_seed(self, wizard_data):
+        current_cosigner_data = wizard_data['multisig_cosigner_data'][str(wizard_data['multisig_current_cosigner'])]
+        if self.has_all_cosigner_data(wizard_data):
+            return 'wallet_password'
+        elif current_cosigner_data['seed_type'] == 'bip39' and 'derivation_path' not in current_cosigner_data:
+            return 'multisig_cosigner_bip39_refine'
+        else:
+            return 'multisig_cosigner_keystore'
+
     def has_all_cosigner_data(self, wizard_data):
-        return len(wizard_data['multisig_cosigner_data']) < (wizard_data['multisig_participants'] - 1)
+        # number of items in multisig_cosigner_data is less than participants?
+        if len(wizard_data['multisig_cosigner_data']) < (wizard_data['multisig_participants'] - 1):
+            return False
+
+        # if last cosigner uses bip39 seed, we still need derivation path
+        current_cosigner_data = wizard_data['multisig_cosigner_data'][str(wizard_data['multisig_current_cosigner'])]
+        if current_cosigner_data['seed_type'] == 'bip39' and 'derivation_path' not in current_cosigner_data:
+            return False
+
+        return True
 
     def finished(self, wizard_data):
         self._logger.debug('finished')