CONF-1943: Persist chain-agnostic Solana Pay intents

[pedronfigueiredo]

Summary

• store validated CAIP-10 source account and CAIP-19 source asset metadata on the already-persisted target TransactionMeta.metamaskPay record
• derive the source chain from both identifiers and reject mismatches without projecting Solana identifiers into legacy EVM Hex fields
• keep quote, instruction, and ordinary Pay selection state transient while preserving existing EVM Pay behavior
• expose the focused setPaySource controller action and preserve source metadata when compatibility metrics are refreshed

Design scope

The original dual-store, versioned intent model was broader than CONF-1943 requires. Solana Pay needs CAIP-compatible source metadata because its source submission is not represented by a local EVM transaction, but that metadata now has one durable owner: the target transaction's existing metamaskPay record.

At-most-once source execution, request correlation, and recovery checkpoints will be introduced only in stacked #10273, where they have their first safety consumer. This PR contains no retry or resubmission behavior.

Validation

• yarn workspace @metamask/transaction-pay-controller run jest --no-coverage src/TransactionPayController.test.ts
• yarn workspace @metamask/transaction-pay-controller run jest --no-coverage src/utils/quotes.test.ts
• yarn workspace @metamask/transaction-pay-controller run test
• yarn workspace @metamask/transaction-controller run test --runInBand
• yarn workspace @metamask/transaction-controller run build
• yarn workspace @metamask/transaction-pay-controller run build
• changed-file ESLint for both affected packages
• yarn workspace @metamask/transaction-pay-controller run messenger-action-types:check
• yarn changelog:validate

Solana Pay ticket and PR index

• CONF-1943 — Persist the Solana Pay intent model in TransactionPayController

  • MetaMask/core — #10272 — CONF-1943: Persist chain-agnostic Solana Pay intents
    • Branched from main

• CONF-1944 — Run the one-attempt Solana source path and recovery loop in Core

  • MetaMask/core — #10273 — CONF-1944: Run the one-attempt Solana Pay path and recovery loop
    • Branched from MetaMask/core#10272

• CONF-1945 — Ship the Solana Pay source picker and confirmation flow in Extension

  • MetaMask/metamask-extension — #46396 — CONF-1945: Ship the Solana Pay flow in Extension
    • Branched from main

• CONF-1946 — Ship the Solana Pay source picker and confirmation flow in Mobile

  • MetaMask/metamask-mobile — #36361 — CONF-1946: Ship the Solana Pay flow in Mobile
    • Branched from main

• CONF-1947 — Wire rollout flags, analytics, and support diagnostics for Solana Pay

  • MetaMask/core — #10274 — CONF-1947: Add Solana Pay rollout diagnostics in Core
    • Branched from MetaMask/core#10273
  • MetaMask/metamask-extension — #46397 — CONF-1947: Add Solana Pay rollout diagnostics in Extension
    • Branched from MetaMask/metamask-extension#46396
  • MetaMask/metamask-mobile — #36362 — CONF-1947: Add Solana Pay rollout diagnostics in Mobile
    • Branched from MetaMask/metamask-mobile#36361