Implementation of missing modules/endpoints

[abeni-csa]

Pull Request

Short description

• What: finish the missing parts of the chapa-rust SDK
• Why: I was building Distributed SMS to manage every school in the country, and for schools that are private and request payment. i need payment gateway that can handle this but this sdk is missing a lot if features so implement the missing parts of the SDK specifically for my use case
• How: extend ChapaClient for supporting all the endpoints

Checklist

• [+] PR targets the correct branch
• [+] Code compiles without errors
• [+] Tests added/updated or not applicable
• [+] CI passes
• [+] Docs/CHANGELOG updated if needed
• [+] PR follows Conventional Commits (feat:, fix:, docs:, etc.)

Testing

• Run: make check
  considered to use cargo-nextest this is the best test experience for Rust, specifically because it enables high-performance, parallel test execution by running each test in a separate process

---

Note

Medium Risk
Adds multiple new API endpoints and refactors request handling (including a breaking change from currency: String to Currency enum), which may impact existing consumers and request serialization behavior.

Overview
Expands the SDK’s coverage by adding client support for transactions (cancel_transaction, get_transaction_events, get_all_transactions), transfers (initiate_transfer, verify_transfer, bulk_transfer, get_all_transfers with query filters), and balances (get_balances, get_balance_by_currency, swap_currency).

Refactors the internal request helper to support multiple body encodings via RequestBody (None/Json/Form), introduces new models for balances, transfers, transaction events/cancelation, and standardizes currency handling by switching InitializeOptions.currency to the Currency enum (also used across new APIs).

Moves inline client tests into a dedicated tests/ harness (wired via Cargo.toml), adds new mockito-based coverage for the new endpoints, and updates examples/README snippets to use Currency.

^{Reviewed by Cursor Bugbot for commit 00e7d7e. Bugbot is set up for automated code reviews on this repo. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 4 potential issues.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 00e7d7e. Configure here.}

[abeni-csa]

Pull Request

Short description

• What: finish the missing parts of the chapa-rust SDK
• Why: I was building Distributed SMS to manage every school in the country, and for schools that are private and request payment. i need payment gateway that can handle this but this sdk is missing a lot if features so implement the missing parts of the SDK specifically for my use case
• How: extend ChapaClient for supporting all the endpoints

Checklist

• [+] PR targets the correct branch
• [+] Code compiles without errors
• [+] Tests added/updated or not applicable
• [+] CI passes
• [+] Docs/CHANGELOG updated if needed
• [+] PR follows Conventional Commits (feat:, fix:, docs:, etc.)

Testing

• Run: make check
  considered to use cargo-nextest this is the best test experience for Rust, specifically because it enables high-performance, parallel test execution by running each test in a separate process

---

Note

Medium Risk
Adds multiple new API endpoints and refactors request handling (including a breaking change from currency: String to Currency enum), which may impact existing consumers and request serialization behavior.

Overview
Expands the SDK’s coverage by adding client support for transactions (cancel_transaction, get_transaction_events, get_all_transactions), transfers (initiate_transfer, verify_transfer, bulk_transfer, get_all_transfers with query filters), and balances (get_balances, get_balance_by_currency, swap_currency).

Refactors the internal request helper to support multiple body encodings via RequestBody (None/Json/Form), introduces new models for balances, transfers, transaction events/cancelation, and standardizes currency handling by switching InitializeOptions.currency to the Currency enum (also used across new APIs).

Moves inline client tests into a dedicated tests/ harness (wired via Cargo.toml), adds new mockito-based coverage for the new endpoints, and updates examples/README snippets to use Currency.

^{Reviewed by Cursor Bugbot for commit 00e7d7e. Bugbot is set up for automated code reviews on this repo. Configure here.}