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Releases

mppx@0.16.0

Minor Changes

• 793aa2b: Replaced request attestation with per-route identity. Breaking changes:

  • mppx/attestation became mppx/identity. Server Mppx.create({ attestation }) was removed (passing it now throws); routes take identity: [verifier, ...] (all required), for example mppx.charge({ amount, identity: [tap] }), and the result exposes result.identity.get(verifier).
  • Added Identity.anyOf(...) to accept one of several protocols. Every member runs, so each presented proof is consumed.
  • Verifiers return missing, invalid or valid (unverified became invalid with code 403), may set their own status code and headers, and declare a stage: request (checked before any 402) or payment (adds headers to the 402 and is checked against the answered challenge and credential before settlement). Identity rejections are returned on the non-200 branch as a 401/403 response.
  • A composed route can include at most one offer with payment-stage identity. Payment-stage identity is not supported on methods with a preflight hook.
  • Client attestation signer maps became identity: [prover, ...]. Provers have a required origin scope, receive the payment challenge in prove(request, context), and can prepare proofs or request one resend with retry(response, context). Requests that carry proofs do not follow redirects.
  • TAP and Web Bot Auth moved to mppx/extensions/identity/tap and mppx/extensions/identity/web-bot-auth; Client.signer became Client.prover.

Patch Changes

• e555544: Fixed client payment events masking original errors when a response body had already been consumed or locked.
• 81a95e1: Fixed multi-method intent handlers rejecting every route option but identity when the methods' options can't be inferred, such as mppx.charge({ amount }) with stripe.create(...).defaultMethods().
• c31d932: Added optional summary and requestBody to proxy endpoint definitions, emitted in the proxy's generated /openapi.json. Free routes can carry them as { free: true, summary, requestBody }. An endpoint that is neither a payment handler, true nor { free: true } (such as { pay: undefined }) now fails closed with an error instead of being proxied.
• dd2c3e3: Refused to sign a zero-amount Tempo proof when the Challenge realm differs from the hostname of the server that sent it, so another origin can't relay a Challenge and replay the proof at its realm. To allow a server whose realm isn't its hostname, pin the realm to its origin with trustedTempoProofRealms on Mppx.create and Fetch.from, such as { 'https://api.example.com': 'MPP Payment' }. Without an origin (McpClient.wrap, or Mppx.create with Transport.mcp()), these proofs are refused unless trustedTempoProofRealms lists the realm. The mppx CLI and sessionManager bootstrap apply the same check, and sessionManager takes trustedTempoProofRealms too. This matches mpp-rs, mpp-go and pympp.
• d78de2c: Fixed missing subscription access-key address indexes when reusing existing keys.
• 909f3db: Fixed Tempo session top-up, voucher retry, close and bootstrap requests to send the credential in the header the challenge selects (such as Payment-Authorization with requiresAuth) instead of always using Authorization. These requests keep the paid request's own Authorization header and no longer follow redirects, so the credential can't reach another origin.
• 464df9a: Fixed Tempo charge verification rejecting split amounts written with leading zeros by comparing them as integers.
• 9008513: Removed the allowKeyAuthorization fee-payer policy: sponsored transactions may now carry a keyAuthorization, so an access key can open a fee-sponsored session (or pay a sponsored charge) in the transaction that installs it. Sponsor exposure stays bounded by maxGas and maxTotalFee.
• 4cfd556: Fixed mppx validate failing Tempo session responses that stream over SSE: when the receipt arrives in the event stream instead of the Payment-Receipt header, validation checks the payment-receipt event in the stream instead of requiring the header, and fails when the stream has none.
• 510d1ed: Fixed mppx validate failing valid SSE sessions: the in-stream payment-receipt event is now read from the server's own stream, which the session client strips, and lone-CR line endings are accepted.
• e6d8ffc: Fixed mppx validate buffering SSE session streams in memory and hanging when the session client cancelled one: in-stream receipts are now read as the client consumes the stream instead of from an unread copy.
• 464df9a: Raised the zod dependency to ^4.6.7 to pick up the fix for GHSA-mrhx-c7xc-m3w5.