fix(payform): fix linting issues

app/reducers/payform.js

@@ -165,9 +165,8 @@ payFormSelectors.payFormIsValid = createSelector(
   payFormSelectors.isOnchain,
   payFormSelectors.isLn,
   payAmountSelector,
-  payInputSelector,
-  (isOnchain, isLn, amount, invoice) => {
-    let errors = {}
+  (isOnchain, isLn, amount) => {
+    const errors = {}
 
     if (!isLn && amount <= 0) {
       errors.amount = 'Amount must be more than 0'

app/routes/app/containers/AppContainer.js

@@ -83,12 +83,12 @@ const mergeProps = (stateProps, dispatchProps, ownProps) => {
     fetchInvoice: dispatchProps.fetchInvoice,
 
     onPayAmountBlur: () => {
-      // If the input is now valid and showErrors was on, turn it off
+      // If the amount is now valid and showErrors was on, turn it off
       if (stateProps.payFormIsValid.amountIsValid && stateProps.payform.showErrors.amount) {
         dispatchProps.updatePayErrors({ amount: false })
       }
 
-      // If the input is not valid and showErrors was off, turn it on
+      // If the amount is not valid and showErrors was off, turn it on
       if (!stateProps.payFormIsValid.amountIsValid && !stateProps.payform.showErrors.amount) {
         dispatchProps.updatePayErrors({ amount: true })
       }

test/components/Form.spec.js

@@ -15,9 +15,12 @@ const payFormProps = {
   currentAmount: '0',
   inputCaption: '',
   showPayLoadingScreen: false,
+  payFormIsValid: {},
 
   setPayAmount: () => {},
+  onPayAmountBlur: () => {},
   setPayInput: () => {},
+  onPayInputBlur: () => {},
   fetchInvoice: () => {},