- Introduced a schema patching system that allows modifications to the OpenAPI schema before client generation.
- Added functionality to deep merge patches from `src/schema-patches.json` into the downloaded schema.
- Implemented a method to apply patches automatically during the build process.
- Updated `generate.ts` to include schema patching logic, enhancing the flexibility of the API client generation process.

…port

- Added `setApiKey` method to manage API key in request headers, allowing for dynamic updates.
- Introduced `setCustomFetch` method to enable custom fetch implementations.
- Refactored client initialization to support singleton pattern for HttpClient, ensuring a single instance is used throughout the application.
- Updated API client configuration methods to allow for dynamic updates of base URL, API key, and fetch function.
- Adjusted tests to utilize the new client initialization and API key management features, ensuring robust testing of the new functionality.

…PI SDK

- Introduced `TonApiParsingError` class for consistent error management across parsing operations.
- Updated parsing functions to throw `TonApiParsingError` for Address, Cell, BigInt, and TupleItem errors, enhancing error clarity.
- Refactored error handling in response preparation to utilize centralized formatting for parsing errors.
- Removed deprecated methods from `HttpClient` and streamlined client initialization.
- Updated tests to validate new error handling structure and ensure robust coverage for parsing scenarios.

- Introduced a base abstract error class `TonApiErrorAbstract` for consistent error management across the SDK.
- Refactored existing error classes (`TonApiHttpError`, `TonApiNetworkError`, `TonApiParsingError`, `TonApiUnknownError`) to extend from the new base class, improving code organization and maintainability.
- Updated error constructors to include detailed messages and original causes for better debugging.
- Enhanced the `prepareResponse` function to handle errors more effectively, returning instances of the new error classes directly.
- Updated tests to validate the new error handling structure and ensure comprehensive coverage for various error scenarios.

- Replaced instances of `TonApiClient` with `initClient` for improved client initialization across multiple example files.
- Updated method calls to use the new flat API structure, enhancing code clarity and maintainability.
- Adjusted error handling in examples to align with the new response pattern, ensuring consistent error management.
- Refactored tests to remove dependencies on `TonApiClient`, streamlining the testing process.

- Downgraded OpenAPI version from 3.1.0 to 3.0.0 for compatibility.
- Updated external documentation URLs for Lite Server and added new endpoints for blockchain block BOC download and library retrieval.
- Introduced new Purchase and AccountPurchases schemas to manage purchase history.
- Refactored existing schemas and interfaces to improve clarity and maintainability, including updates to Jetton and NFT operations.
- Removed deprecated endpoints related to inscriptions and adjusted related documentation.
- Enhanced client interfaces to support new wallet and purchase functionalities.
- Improved query parameters for various endpoints to ensure better usability and flexibility.

…t header

- Introduced a new instance-based approach for the TonApiClient, allowing for better encapsulation and configuration.
- Updated error handling to throw specific errors directly, improving clarity and consistency in error management.
- Refactored response preparation to streamline error handling and ensure proper error propagation.
- Enhanced documentation and examples to reflect the new client structure and usage patterns.
- Updated tests to validate the new instance-based client and error handling mechanisms, ensuring comprehensive coverage.

- Replaced `initClient` with direct instantiation of `TonApiClient` in multiple example files for improved clarity and consistency.
- Updated method calls to utilize the new client instance, enhancing error handling and response management.
- Refactored error handling in examples to align with the new client structure, ensuring consistent error reporting.
- Adjusted tests to validate the new client usage and error handling mechanisms, ensuring comprehensive coverage.

…ge.json

…ient interfaces

- Changed the format of address fields to 'maybe-address' across various components in the API schema and client interfaces, allowing for null values.
- Updated related parsing logic to handle 'maybe-address' format, ensuring compatibility with empty strings.
- Enhanced tests to validate the new 'maybe-address' handling, including scenarios for valid addresses and empty strings.

…ge.json

  - Add TonApiValidationError for Address/Cell string validation
  - Fix TonApiPromise to preserve typed .catch() through .then()/.finally() chains
  - Add cellToString() helper that validates and converts Cell strings to expected format
  - Simplify addressToString() to validate without parsing (returns string as-is)
  - Update README with concise validation note
  - Add validation tests for both Address and Cell (hex/base64)
  - Add promise chain typing tests

…ge.json; add ScaledUI schema to API