feat: add HTTP support

[matiasedgeandnode]

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[Copilot]

Pull request overview

This PR adds HTTP support for x402 payments by creating an adapter that integrates the Ampersend SDK's treasurer pattern with Coinbase's x402 v2 SDK for HTTP clients. This enables sophisticated payment authorization logic (budgets, policies, approvals) to work seamlessly with standard x402 HTTP clients like @x402/fetch.

Key Changes

• Introduces wrapWithAmpersend() adapter function that wraps x402Client instances with treasurer-based payment hooks
• Implements TreasurerSchemeClient for v1 protocol support using WeakMap-based storage for correlation
• Adds comprehensive test suite covering registration, payment flows, error handling, and edge cases

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
typescript/packages/ampersend-sdk/src/x402/http/adapter.ts	Core adapter implementation with TreasurerSchemeClient and wrapWithAmpersend function
typescript/packages/ampersend-sdk/src/x402/http/index.ts	Module export for the HTTP adapter
typescript/packages/ampersend-sdk/src/x402/http/README.md	Documentation with API reference, usage examples, and integration guide
typescript/packages/ampersend-sdk/src/x402/index.ts	Exports wrapWithAmpersend to SDK's x402 module
typescript/packages/ampersend-sdk/tests/x402/http/adapter.test.ts	Comprehensive test suite with 421 lines covering all adapter functionality
typescript/packages/ampersend-sdk/package.json	Adds @x402/core as optional peer dependency and dev dependency
pnpm-lock.yaml	Lockfile updates for @x402/core@2.1.0 dependency

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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[tmigone]

plgtm