# December 18, 2025

## 1.0.0-rc73

**`(fix):`** Fix endpoint header parameters being included in request body instead of HTTP headers.
Header parameters (like Idempotency-Key) are now properly extracted from params and
passed via the headers parameter in Request.new() calls.

**`(feat):`** Add normalize\_keys utility to accept both snake\_case and camelCase parameter keys.
SDK endpoint methods now automatically convert camelCase keys (e.g., refundMethod)
to snake\_case (e.g., refund\_method) at the start of each method. This allows users
to pass JSON data with camelCase keys directly to SDK methods without manual conversion.

## 1.0.0-rc72

**`(chore):`** Add sdkVersion as a top-level field in the generated metadata.json file.