WP Simple Pay Pro 3 Changelog

Changelog

4.0.1 - January 5, 2021

New: Give feedback about webhook configuration in email settings.
Fix: Adjust opinionated form styles for Twenty Twenty One theme.
Fix: Ensure "Test Email" tool sends an email when Subscriptions are not enabled.
i18n: Update Romanian translations.

4.0.0 - December 1, 2020

New: Update plugin settings screen UI and UX.
New: Add "Payment Receipt", "Payment Confirmation", and "Upcoming Invoice" email settings.
New: Add "Resend Payment Receipt" tool.
New: Allow One-Time Custom Amount + predefined amounts in the same form.
New: Add support for Stripe's Customer Billing Portal.
New: Allow Subscriptions to be cancelled when managing the Payment Method.
New: Parse shortcodes in [simpay_payment_receipt] shortcode.
New: Show notice and don't output Payment Form if REST API is disabled.
New: Prevent switching to an invalid Payment Mode in per-form settings.
New: Payment Request - Add "Booking" type and "Button Theme" setting.
Fix: Clarify Lite to Pro upgrade notice and steps.
Fix: Ensure plugin update notice spans all columns in table.
Fix: Ensure Subscription metadata is mapped to PaymentIntent when using Stripe Checkout.
Fix: Ensure Dropdown used for predefined Amounts handles decimals.
Fix: Avoid page "jump" when loading Payment Form settings.
Fix: Avoid additional tab stop when using multiple Payment Methods.
Fix: Avoid sending URLs in form data for ModSecurity rules.
Fix: Ensure ACH Debit Payment Forms load Plaid when used second on the page.
Fix: Ensure notices can be persistently dismissed in WordPress 5.6.
Fix: Always show "Sandbox" and "Production" Plaid keys for improved UX.
Fix: Ensure "Recurring Amount Toggle" custom field settings are used to create Subscriptions.
Fix: Retrieve Coupons using the current form's payment mode.
Fix: Avoid PHP error when deleting unused Customer record with iDEAL.
Dev: Update Stripe API PHP Library to 7.53.0.
Dev: Rename Stripe script handle to sandhills-stripe-js-v3.
Dev: Rename Stripe script handle to simpay-google-recaptcha-v3.

3.9.8 - October 20, 2020

New: Add theme compatibility for reCAPTCHA badge display.
Fix: Avoid double conversion to cents when using comma decimal separators.
Fix: Ensure generated Plans without Customer data are automatically purged.
Fix: Disable autocomplete in plugin setting inputs.
Fix: Ensure long Plan names do not cause overflow in form settings.
Fix: Ensure webhook event dates are recorded as valid dates.
Fix: Remove references to Public Key in Plaid settings.
Fix: Do not register unused API endpoints in Lite.
Fix: Ensure reCAPTCHA compatibility with Payment Request buttons.
i18n: Update Romanian translations.

3.9.7 - September 17, 2020

New: Add notice discouraging the use of manually set API keys.
New: Add collected address to iDEAL Payment Method.
New: Add invalid reCAPTCHA configuration feedback to settings.
Fix: Ensure one-time set amounts can be dynamically set.
Dev: Add reCAPTCHA and rate limit information to System Report.

3.9.6 - September 9, 2020

New: Add reCAPTCHA validations to API endpoints (in addition to page load).
i18n: Add Japanese translation.
i18n: Update Romanian translation.

3.9.5 - August 25, 2020

New: Add IP-based rate limiting to internal API endpoints.
New: Add setting to increase minimum reCAPTCHA threshold.
Fix: Remove extra wrapping element from output in the "Text" custom field.
Dev: Display latest webhook event in System Report.

3.9.4 - August 12, 2020

Fix: Use global Payment Mode when processing Invoice webhooks if no form context is available.
i18n: Update simple-pay-ro_RO

3.9.3 - August 11, 2020

Fix: Update ACH Debit via Plaid to work with Plaid's new Link tokens. https://plaid.com/docs/upgrade-to-link-tokens/
Fix: Avoid potential PHP error when a Payment has no Charges.
Fix: Allow "Same billing and shipping info" to submit a "required" Address field.
Fix: Ensure checkboxes in Safari do not shrink when the label is long.
Fix: Provide context-specific Stripe error message string for invalid coupons.
Fix: Ensure {charge-date} Payment Confirmation Template Tag is output in the site's local timezone.
Fix: Avoid marking Webhook processing as failed if the object is missing identifying metadata.
Fix: Ensure approriate error message is shown when an SCA check fails.

3.9.2 - July 27, 2020

Fix: Avoid PHP error on some versions when accessing class property.
Fix: Ensure manual verification of webhooks works in all modes when not using an Endpoint Secret.
Fix: Ensure Single Subscription settings are properly reflected when using per-form Live Mode.
Fix: Ensure "Subscription Plan Selector" can have a custom label.
Fix: Ensure generated Customer records with active payments are not migrated are not retroactively deleted.
Fix: Improve Stripe Webhook setting strings.
Dev: Update file copyrights.

3.9.1 - July 8, 2020

Fix: Ensure HTML is allowed in custom field labels.
Fix: Ensure address postal code is mapped to Customer object.
Fix: Ensure radio fields can increment quantity.
Fix: Ensure proper namespace is referenced when deleting a generated Plan.

3.9.0 - July 6, 2020

New: Add ACH Debits (via Plaid) Payment Method.
New: Add per-form "Test Mode" toggles.
New: Add localization support for Stripe errors.
New: Add default labels and remove placeholders in form builder.
New: Update available Stripe Elements and Stripe Checkout locales.
Fix: Update supported country and currency lists.
Fix: Wait 24 hours before deleting generated records.
Fix: Disable custom fields that cannot be added to the current Payment Form.
Fix: Avoid PHP notice in array_unique.
i18n: Update simple-pay-ro_RO
Dev: Update WordPress coding standards.
Dev: Update Stripe PHP library to 7.37.1.
Dev: Add simpay_send_upcoming_invoice_email filter.

3.8.3 - June 1, 2020

Fix: Ensure Payment Request Button is initialized regardless of form type used.
Fix: Ensure Payment Request Button button type is properly saved.
Fix: Remove 20 field limit.

3.8.2 - May 13, 2020

Fix: Ensure "Amount" and "Quantity" settings in Radio and Dropdown fields respect settings.
Fix: Add extra error catching around incorrectly configured reCAPTCHA.
Fix: Avoid duplicate filter names with inconsistent argument signatures which can cause multiple Payment Forms on the same page to not output correctly.

3.8.1 - May 7, 2020

Fix: Ensure custom post type row actions are not overridden.
Fix: Ensure relevant fields show when Subscriptions are not active on install.

3.8.0 - April 29, 2020

New: Add one-time amount support for iDEAL Payment Method.
New: Update Payment Form builder user interface design and accessibility.
New: Stripe Checkout - Allow collection of Shipping Address.
New: Add "Heading" custom field type.
New: Support importing and exporting Payment Forms.
New: Use matching "Test Mode" badge styles in WordPress toolbar.
Fix: Hide "Image" field in "Stripe Checkout Display" when using Subscriptions (unsupported by Stripe API).
Fix: Stripe Checkout - Fall back to generic "WP Simple Pay" line item has no name.
Fix: Hide "minimum amount" error until a custom amount has been entered.
Fix: Ensure name and email from Payment Request Button are used for Customer record.
Fix: Ensure adequate spacing under Payment Form title with opinionated styles.
Fix: Remove "Subscription Plan Selector" custom field when not using Subscriptions.
Fix: Remove Subscription "Custom Amount" custom field when not using Subscriptions.
Fix: Remove "Custom Amount" custom field when not using custom amounts.
Fix: Update notice about Product Plans being separate in Live and Test modes.
Dev: Use WordPress core custom post type screens for managing Payment Forms.
Dev: Update Stripe API PHP library to 7.28.0.
Dev: Update Stripe API version to 2020-03-02.
Dev: Update EDD_SL_Plugin_Updater to 1.7.
Dev: Add \SimplePay\Core\Utils\Collection for managing generic registries.
Dev: Cache calls to \Stripe\Plan::all() when more than 25 Plans are found.
Dev: Use WordPress core .button styles for WP Simple Pay button base.
Dev: Allow SIMPLE_PAY_LICENSE_KEY to be defined in wp-config.php.
Dev: Add simple-pay-es_ES translation files.

3.7.1 - March 2, 2020

New: Update Romanian translations.
Fix: Avoid extra formatting changes when converting amounts to dollar.
Fix: WordPress 5.4 UI compatibility.
Fix: Validate reCAPTCHA on form load and block submissions if necessary.

3.7.0 - February 25, 2020

New: Allow payment methods to be updated before a Subscription renews.
New: Implement confirmation template tag support for accessing payment, subscription, and customer record data via dynamic tags such as {customer:name}.
New: Split structural and visual styles and inherit more theme defaults when no styles are applied.
New: Disable entire form during submission.
New: Add "Hidden" custom field type.
New: Allow field values to be set dynamically with via simpay_form_{$form_id}_field_{$field_id}_default_value filters.
New: Add option to always hide the ZIP/postal code on the Credit Card field.
New: Improve default form styles.
New: Stripe Checkout - Add support for Stripe Checkout's "Booking", "Donate", and "Pay" button types.
New: Stripe Checkout - Automatically remove generated Customer, Product, and Plan records upon completed Stripe Checkout Sessions.
New: Stripe Checkout - Add separate "Payment Cancelled" page setting for incomplete Stripe Checkout Sessions.
New: Stripe Checkout - Add reCAPTCHA v3 support.
New: Stripe Checkout - Add notice about branding options in form settings.
Fix: Ensure the order of user-select subscription plans save correctly.
Fix: Ensure WordPress core's WP_List_Table is used to prevent future markup change breakage.
Fix: Reduce complexity of "Upgrade" submenu item for Lite.
Fix: Strip HTML from custom field label previews.
Fix: Update Mexican Peso symbol to MXN
Fix: WordPress 5.3 style adjustments.
Fix: Only enqueue jQuery UI Datepicker when needed.
Fix: Align tax calculations with Stripe and ensure all results are valid.
Dev: Remove Javascript Coding Standards Checker in favor of ESLint.
Dev: Rename class-based files to include a class- prefix.
Dev: Add WordPress Coding Standards rulesets.
Dev: Ensure all files have a PHPDoc . header.
Dev: Update Stripe API Version to 2019-12-03.
Dev: Update Stripe API PHP bindings to 7.20.0.

3.6.8 - January 7, 2020

New: Hide generated Plans from Subscription Plan selector in form settings.
Fix: Handle saving payment confirmation messages in WordPress 5.3.1+
Fix: Ensure multiple forms with Payment Request Buttons on the same page do not interfere with each other's validation.
Dev: Rename duplicate hook simpay_before_subscription_created to simpay_after_subscription_created.

3.6.7 - December 19, 2019

Fix: Avoid ending Subscriptions too early in certain instances of Webhook failures.

3.6.6 - December 17, 2019 (skipped for version 3.6.7)

New: Show a descriptive error (vs. -1) when the coupon AJAX security check fails.
New: Attach generated Plans to existing Product and prepend - generated by WP Simple Pay.
Fix: Ensure Payment Request Buttons appear in Overlay forms.
Fix: Ensure references to $ in the WordPress admin resolve properly.
Fix: Stripe Checkout - Always create a Stripe Customer record to track coupon usage.
Fix: Apply the discount amount against item quantities and reflect properly in the UI.
Fix: Ensure Subscription's PaymentIntent has fully succeeded before redirecting.
Fix: Ensure {max-charges} properly outputs the amount of maximum charges.
Dev: Introduce simpay_customer_create filter to return a Customer ID and short circuit creation.
Dev: Introduce simpay_stripe_api_publishable_key and simpay_stripe_api_secret_key filters.
Dev: Introduce \SimplePay\Core\Payments\Payment_Confirmation\get_confirmation_data() for use in custom snippets to return any relevant confirmation data.
Dev: Add ?form_id= to Payment Confirmation and Error redirect URLs.

3.6.5 - November 13, 2019

Fix: Ensure "Manage API keys manually" button is always available.
Fix: Ensure billing frequency appears in {recurring-amount} payment confirmation template tag.
Fix: Ensure Stripe Elements locale is used in the Credit Card field.
Fix: Ensure custom cron schedule is registered.
Fix: Ensure Statement Descriptor always results in a valid string.
Fix: Ensure WordPress 5.3 admin UI appears correctly.
Fix: Avoid PHP notices for undefined Stripe objects on payment confirmation.
Fix: Clarify Stripe Checkout "Require Billing Address" form setting description.

3.6.4 - October 1, 2019

Fix: Avoid rounding error when converting amounts to cents in PHP 7.1+.
Fix: Do not reference "Stripe Checkout overlay" in setting descriptions.
Fix: Remove coupon when total amount changes to ensure no negative values exist.
Fix: Ensure "Total Amount Label"'s "Show Recurring Total" label uses the correct subscription interval.
Fix: Ensure "Country" field appearance is correct in Firefox.

3.6.3 - September 20, 2019

Fix: Stripe Checkout - Use Site Title if Company Name field is blank.
Fix: IE 11 Javascript support for Promise and Object.assign
Fix: IE 11 CSS support for flexbox alignment.
Fix: Avoid uncaught PHP error while handling legacy simpay_stripe_charge_args filter.
Fix: Ensure "Recurring Amount Toggle" field can be used with "One-Time Amount" payment forms.
Fix: Ensure Stripe Plans created before 2018-05-21 have spaces stripped before using to generate a new ID.
Dev: Add simpay_webhook_subscription_created and simpay_webhook_payment_intent_succeeded actions fired via Webhooks to allow easier action to be taken after successful payments.

3.6.2 - September 17, 2019

Fix: Stripe Checkout - only generate a Customer record when collecting Customer-specific data.
Fix: Stripe Checkout - update available locales (add Polish, Portuguese).
Fix: Ensure custom subscription names can be generated when item description is not available.
i18n: Update Romanian translations.

3.6.1 - September 14, 2019

Fix: Avoid creating duplicate Customer records when multiple Stripe Checkout forms exist on the same page.
Fix: Ensure Overlay form types can always popup when multiple exist on the same page.
Fix: Remove attempt at passing POST values through Stripe Checkout to ensure a valid return URL is generated.
Fix: Pass full Customer object to legacy simpay_subscription_created hook.

3.6.0 - September 12, 2019

New: Strong Customer Authentication (SCA) support.
New: Support Stripe's off-site Checkout pages.
New: Add setting to change Card field locale.
New: Show separate Initial Setup Fee and Plan Setup Fee line items for Subscriptions.
New: Improve Stripe connected account information in admin settings.
New: Help WP Simple Pay improve by reporting usage analytics.
New: Automatically attempt to reverify domain for Apple Pay when switching API keys.
Fix: Ensure custom subscription amount does not inherit a previously selected plans' setup fee.
Fix: Remove extra apostrophe escaping from meta in the Stripe Dashboard.
Dev: Update to v6.43.0 of Stripe's PHP API library.
Dev: Remove WP_Session library.
Dev: Enforce Stripe's PHP library cURL requirement.
Dev: Deprecated many hooks/filters that no longer apply to the new payment flows. Please review any custom snippets that may change functionality.

3.5.3 - July 10, 2019

Fix: Ensure setup fees over 999 are calculated properly.
Fix: Ensure trial periods do not end too soon or too late by using the same timezone settings as Stripe.
Dev: Update ro_RO translations.

3.5.2 - June 17, 2019

Fix: Ensure Checkout Button amount is updated when amount changes, when using reCAPTCHA.
Fix: Use filtered description for Stripe Payment description.
Fix: Remove removeProp usage for better jQuery 3.x compatibility.
Fix: Do not attempt to combine boolean and array.
Fix: Update "Tax Percent" setting description.

3.5.1 - May 22, 2019

Fix: Respect Payment Button and Checkout Button "Text" and "Processing Text" settings when outputting buttons.
Fix: Ensure Payment Button style defaults to "Stripe blue" when no default is available.
Fix: Hide Payment Request Button (Apple Pay/Google Pay) when Account Country value is not supported.
Fix: Ensure one-time set amount payments that are toggled recurring can be properly processed.
Dev: Update ro_RO translations.
Dev: Add fr_FR translations.

3.5.0 - May 13, 2019

New: Add "Pay", "Donate", and "Buy" button types to "Apple Pay/Google Pay Button". Find out more: https://docs.wpsimplepay.com/articles/apple-pay-google-pay/
New: Attach coupon usage to Stripe Customers to allow accurate coupon usage tracking. Find out more: https://docs.wpsimplepay.com/articles/adding-coupons-stripe/
New: Accurately track coupon usage and respect restrictions created in Stripe. Find out more: https://docs.wpsimplepay.com/articles/adding-coupons-stripe/
New: Add "Customer Phone" custom form field. Find out more: https://docs.wpsimplepay.com/articles/custom-form-fields/
New: Save Billing Address data to Stripe Charge record.
New: Save Shipping Address data to Stripe Customer record.
New: Option to automatically create and verify Webhooks in Stripe (not available with Stripe Connect). Find out more: https://docs.wpsimplepay.com/articles/webhooks/
New: Allow opinionated form styles to be applied to on-page fields while using Stripe Checkout. Find out more: https://docs.wpsimplepay.com/articles/style-options/
New: Add option for reCAPTCHA v3 Invisible verification. Find out more: https://docs.wpsimplepay.com/articles/recaptcha/
New: Per-form button styling options. Find out more: https://docs.wpsimplepay.com/articles/style-options/
New: Verify Stripe Webhook signatures for enhanced security. Find out more: https://docs.wpsimplepay.com/articles/webhooks/
New: Alert the need to reconnect to Stripe and update other settings when toggling "Test Mode".
New: Improve onboarding notices and alerts.
New: Run simpay_{$filter} alongside all usage of simpay_form_{$form_id}_{$filter}
New: Add helpful hint about additional fields available while using Stripe Checkout.
New: Add option to disconnect from Stripe.
New: Show site administrators a notice when Stripe API keys are missing.
New: Add viewport tag to for Stripe Elements.
Fix: Ensure subscription product plan nickname is output in label by default.
Fix: Ensure coupon code label is not improperly appended multiple times.
Fix: Ensure {item-description} payment details tag is not empty for subscriptions.
Fix: Flush plugin update cache when enabling beta versions.
Fix: Remove potential theme-set background image from payment button.
Fix: Remove custom amount field while using subscriptions.
Fix: Group Stripe Checkout display settings.
Fix: Avoid Javascript error in Internet Explorer 11.
Fix: Do not pass country to Stripe Checkout configuration.
Fix: Reenable Checkout Button with the proper value (Pay {{amount}}, etc).
Dev: Remove extraneous colons from field labels.
Dev: Add notice about upcoming changes to Stripe Checkout.
Dev: Implement robust webhook handling with idempotency.
Dev: Update company name throughout files.
Dev: Updated to Stripe PHP library v6.34.2.
Dev: Updated to use Stripe API version 2019-03-14.

3.4.0 - March 28, 2019

New: Accept payments through Apple Pay and Google Pay using the Payment Request API. Find out more: https://demo.wpsimplepay.com/apple-pay-google-pay/
New: Separate custom field types in to "Customer", "Payment", and "Standard" categories.
New: Prevent duplicate Payment and Customer fields from being added to the same form.
New: Enable ZIP/Postal Code verification by default on new forms.
New: Allow "Company Name" value to be blank.
New: Add "Country" setting in Stripe Setup settings to send with Stripe API requests.
Fix: Show correct minimum amount error when custom amount is invalid.
Fix: Ensure multiple of the same overlay form can appear on a single page.
Fix: Update styling for number amount field for better currency symbol alignment.
Fix: Ensure Embedded form width limited to 400px.
Fix: Avoid text clipping on Dropdown fields.
Fix: Change "Plan Setup Fee" string to "Initial Setup Fee" for additional fees applying to all subscription plans.
Fix: Clarify what amounts the tax rates are applied to in the setting's description.
Dev: Updated to Stripe PHP library v6.30.4.
Dev: Updated to use Stripe API version 2019-02-19.
Dev: Remove unused files.

3.3.10 - March 4, 2019

Fix: Ensure custom overlay forms remains open in Safari.

3.3.9 - March 1, 2019

Fix: Ensure custom overlay forms launch properly on mobile browsers.

3.3.8 - February 28, 2019

New: Add updated methods for toggling custom overlay forms.
Fix: Ensure generated item description uses correct dollar amount in Stripe receipt.
Fix: Ensure generated item description is translateable.
Fix: Ensure Overlay payment forms appear over all other content.
Fix: Ensure Overlay payment form text is not blurry.
Fix: Allow coupon to be validated using "Enter" keypress.
Fix: Ensure payment form can be submitted using "Enter" keypress (when not adding a coupon).
Fix: Prefix Stripe API request from library with "WordPress".
Fix: Avoid PHP error when requesting subscriptions that do not exist.
Fix: Keep radio button indicators when reordering custom fields or subscription plans.
Fix: Ensure "Dropdown" custom field type can be properly set as required.
Dev: Requires WordPress 4.9+

3.3.7 - February 21, 2019

Fix: Correct setup fee calculation when submitting subscription sign up more than once.
Fix: Correct tax amount displayed on payment confirmation due to improper decimal placement.
Fix: Don't format custom amount before validation when input type set to 'number'.
Tweak: Set z-index to max for custom overlay form container so it appears above other high z-index elements.
Tweak: Add dimiss link to Stripe Connect notice.
Tweak: Minor payment form default style updates.

3.3.6 - January 8, 2019

Fix: Adjust form object to ID conversion.
Tweak: Allow entering of Stripe API keys manually before first time authorizing with Stripe Connect.

3.3.5 - January 6, 2019

Fix: Corrected tax amount calculation regardless of comma or period decimal separator.
Fix: Corrected Stripe Checkout amount when using enter key to submit immediately after entering a new custom amount.
Fix: Payment form rendered more than the intended amount when used multiple times on the same page.
Tweak: When custom amount input type set to "number" using a filter, the step attribute will be set to "0.01" to allow decimals.
Dev: Check and convert form object to ID when necessary.

3.3.4 - December 28, 2018

New: You can now easily connect your Stripe account with Stripe Connect. See your settings page for more details.
New: Display admin notice about upcoming PHP 5.6 requirement if running an older version.
Fix: Don't set focus to the first field in embedded forms (only in overlay forms).
Fix: Reset checkout button text back to original after card validation fails.
Fix: Prevent JavaScript errors when trying to validate hidden shipping address fields.
Fix: Prevent Stripe.js version conflict with Restrict Content Pro (and possibly other plugins using Stripe.js).
Fix: Correct rounding issue in total amount label with subscription plans that contain cents.
Dev: Updated non-specific form filter hooks with added form ID.
Dev: Added filter hook for additional custom field types.

3.3.3 - December 5, 2018

Fix: Coupon codes used with set single plan subscription forms improperly calculated.
Fix: Trial subscriptions were charging immediately in some cases.
Fix: Setup fees for user-selectable subscriptions miscalculated in the initial payment label.
Fix: Allow decimal numbers to be used for quantity multiplier custom fields.

3.3.2 - December 3, 2018

Fix: Error adding metadata to invoices after finalizing in some cases.

3.3.1 - December 2, 2018

Fix: Amount off coupon codes improperly calculated.
Fix: Embedded and Overlay custom fields not saving to Stripe metadata.

3.3.0 - November 27, 2018

New: Added embedded and overlay custom form display options. See https://wpsimplepay.com/embedded-overlay-custom-form-display/
Dev: Remove excessive post meta calls.
Tweak: Updated to Stripe PHP library v6.23.0.

3.2.5 - November 12, 2018

Fix: Incorrect variable name in new beta opt-in option.

3.2.4 - November 12, 2018

New: Added setting to opt into WP Simple Pay Pro beta releases.

3.2.3 - October 3, 2018

Dev: Added filter hook to add or modify arguments when a Stripe customer is created.
Dev: Added filter hook to add or modify arguments when a Stripe subscription is created.
Dev: Added filter hook to allow additional attributes to be added to the payment form tag.
Dev: Updated and hardened webhook code incorporating updates as of Stripe API 2018-09-06.
Dev: Updated to Stripe PHP library v6.19.1.

3.2.2 - August 3, 2018

Fix: Subscriptions with trials incorrectly charging right away as of Stripe API 2018-05-21.
Dev: Updated to Stripe PHP library v6.15.0.

3.2.1 - July 27, 2018

Fix: Recurring amount label doesn't properly factor in discounts from repeating or multi-month coupon codes.
Fix: Sanitize custom amount plan IDs so they only contain alphanumeric and _- characters on creation (added in Stripe API 2018-02-05).
Dev: System report: Update Stripe API endpoint for the TLS 1.2 compatibility check.
Dev: Updated to Stripe PHP library v6.11.0.

3.2.0 - July 13, 2018

Fix: Custom amount 1-cent rounding error in some cases.
Fix: Adding metadata to invoices after sending causes PHP error in some cases.
Fix: Displayed tax amount, total amount and recurring amount labels weren't accurate in some cases.
Tweak: Display more than 100 subscription (product) plans when selecting within payment form settings.
Dev: Updated to Stripe PHP library v6.10.2.
Dev: Updated Accounting JS & Chosen JS libraries.

3.1.19 - May 15, 2018

Tweak: PHP 5.4 or higher now required.
Tweak: If the custom amount plan is selected in a user-selects plan form, focus input and blank out value.
Dev: Updated to Stripe PHP library v6.7.1.

3.1.18 - April 2, 2018

Fix: Detection and warning about upcoming PHP 5.4 requirement.
Fix: Error when activating plugin with WP-CLI.
Tweak: PHP 5.3 or higher now required.
Tweak: Removed Bitcoin support inline with Stripe (https://stripe.com/blog/ending-bitcoin-support).

3.1.17 - March 20, 2018

Fix: Integrate Stripe Plans with Stripe Products as introduced in Stripe API 2018-02-05.
Tweak: Only check software license in admin max once per day.
Dev: System report: Add mbstring (Multibyte String) check.

3.1.16 - February 22, 2018

Feature: Add Romanian translation.
Fix: "Start your free trial" checkout button text not appearing when a tax rate is in place.
Fix: PHP error with software licensing updater in some cases.
Fix: Dequeue all public CSS when "Default Plugin Styles" option is disabled.
Dev: Updated to Stripe PHP library v5.9.2.

3.1.15 - January 23, 2018

Fix: Detection and warning about PHP 5.3 requirement.
Fix: Load custom sessions class in admin as it's still used for subscription plan setup fees.

3.1.14 - January 22, 2018

Fix: Fix and simplify payment form previews.
Fix: Translations weren't getting loaded properly (missing load_plugin_textdomain call).
Dev: Don't load custom sessions class in admin.
Dev: Updated to Stripe PHP library v5.9.0.

3.1.13 - January 3, 2018

Fix: (Better) session handling to work across various hosts. Back to using the current version of WP Session Manager (https://github.com/ericmann/wp-session-manager) (2.0.2) with the option of switching to native PHP sessions.
Fix: Force use of native PHP sessions when hosting with Pantheon.
Fix: Custom fields (except for first) were losing metabox settings content.
Dev: Updated to Stripe PHP library v5.8.0.
Dev: Updated jQuery Validation & Chosen JS libraries.

3.1.12 - December 12, 2017

Fix: Check for an existing session before starting a new one.

3.1.11 - December 12, 2017

Fix: Session handling updated to work across various managed hosts. Now uses code from WP Native PHP Sessions (https://github.com/pantheon-systems/wp-native-php-sessions) over previously used WP Session Manager (https://github.com/ericmann/wp-session-manager).
Fix: PHP 7.2 incompatibility - Misuse of reserved keyword "Object".
Dev: Added filters to provide alternate custom field front-end HTML and admin UI.
Dev: Updated action fired after a subscription is created to include the initial charge.
Dev: Added action hook for adding metabox setting panel content.
Dev: Added jQuery trigger to fire after front-end form validation is setup (in order to add custom validation rules).
Dev: Updated to Stripe PHP library v5.7.0.

3.1.10 - November 20, 2017

Fix: Recurring total amount miscalculation when tax in use.
Fix: Ordering of plans when User Selects Plan option is set was not saving the order correctly in some cases.
Fix: jQuery conflict where "jQuery" prefix was improperly used instead of "$".
Fix: Payment receipt session error message produced by a shortcode was improperly appearing in WP admin.

3.1.9 - November 13, 2017

Fix: Duplicate field rendering when custom amount field present and amount type toggled off.
Fix: Tax metadata not saving when custom fields are present.
Fix: Rounding issue with tax percent set to 4 decimals used with zero-decimal currencies.
Fix: Coupon code now works with recurring toggle.
Dev: Updated to Stripe PHP library v5.6.0.
Dev: Updated to EDD SL Plugin Updater v1.6.15.

3.1.8 - October 31, 2017

Fix: Add metadata for tax percent option.
Fix: Recurring toggle now works properly.
Fix: Default for total amount now defaults to minimum amount when using a custom amount input.
UI: Stay on selected form settings tab after saving.
UI: Updated grammar in error message.
Dev: Added simpay_charge_error_message filter.
Dev: Updated to Stripe PHP library v5.5.1.

3.1.7 - October 25, 2017

Feature: Added option to set the payment success page (or redirect URL) per payment form.
Fix: Super rare case where a certain amount value was off by one cent when using dropdowns as an amount field.
Fix: Add fallback check for wp_doing_ajax() introduced in WP 4.7.
Dev: Better handling of alternate Stripe API keys.
Dev: Add better extensibility to webhook handling with some new and refined action hooks.
Dev: Updated to Stripe PHP library v5.4.0.

3.1.6 - September 28, 2017

Feature: Add support for zero amount and less than 50 currency unit subscription plans.
Fix: Refresh license key check on license page to make it easier for upgraded accounts to see changes right away.
Fix: Make sure automatic updates work on multi-site.
Tweak: Add an error message if trying to activate Pro with Lite already installed.
Dev: Overhaul to plugin code structure.
Dev: Add filter simpay_payment_button_class to add or remove classes from the on-page form payment button.
Dev: Add metadata to the charge_created and subscription_created action hooks.
Dev: Updated to Stripe PHP library v5.2.3.

3.1.5 - September 8, 2017

Fix: Metadata values for radio field + custom amount will show the label instead of "on".
Fix: Prevent activation when WP Simple Pay Lite is active to avoid a fatal error.

3.1.4 - August 29, 2017

Fix: Live mode keys will now load properly.
Updated to Stripe PHP library v5.2.0.

3.1.3 - August 28, 2017

Fix: Numeric only plan IDs will now work correctly.
Tweak: JavaScript updates to improve performance.
Dev: Update success page redirect filter to allow for external URLs.
Dev: Make simpay_fee_amount filter also work as a form-specific filter.
Dev: Make simpay_fee_percent filter also work as a form-specific filter.
Dev: Add simpay_plan_name_label filter.
Updated to Stripe PHP library v5.1.3.

3.1.2 - July 24, 2017

Fix: Correct a JavaScript bug that was breaking forms.

3.1.1 - July 24, 2017

Feature: Added setting to control Tax Rate Percent.
Fix: Fix bug with invoices showing an initial $0.00 charge in some cases.
Fix: Send Stripe API Version information with requests.
Fix: Remove payment confirmation pages on full uninstall.
Tweak: Automatic cache exclusion for payment confirmation pages.
Dev: Add simpay_cache_exclusion_uris filter.
Dev: Add per-form filter for new tax percent setting.

3.1.0 - July 13, 2017

Feature: Installment plans added for subscriptions.
Feature: Add a setting to control free trial button text.
Fix: Remove support for Alipay since it is no longer supported through Stripe Checkout.
Fix: Added plugin information to Stripe API calls.
Tweak: Make recurring total label show the correct amount when multiplied by a quantity.
UI: Minor tweaks to the multi-plan admin area.
Dev: Updated to Stripe PHP library v5.1.1.

3.0.3 - June 29, 2017

UI: Update field label description for checkbox custom field.
UI: Add a placeholder setting for coupon fields.
Fix: Make sure metadata gets added to the subscription if it has a trial period.
Fix: Get the processing text setting to work correctly.
Dev: Add 3 new action hooks.
Dev: Updated to Stripe PHP library v5.0.0.

3.0.2 - June 21, 2017

Fix: Make trial details template load correctly for multi-plans.

3.0.1 - June 21, 2017

Fix: Bug with fee amount filter causing issues with zero-decimal currencies.
Fix: Subscription custom amount field will properly take the default value.
Fix: Custom amount default fields can now be left blank.
Fix: Allow HTML in the custom field checkbox label.
Fix: Checkout overlay will load properly now in IE.
Dev: Updated to Stripe PHP library v4.13.0.

3.0.0 - June 13, 2017

A brand spankin' new rewrite from the ground up. Too many updates to list here.