feat: Solana exact rail — buyer (SOL-01) + CDP seller (SOL-02)

feat: Solana exact rail — buyer (SOL-01) + CDP seller (SOL-02)fskroes/AllowanceKit #5 · 6 diagrams

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01 / 06Solana rail adds exact and upto paymentsAgents can now pay on Solana using exact transfers or open metered payment channels.
02 / 06Seller now meters calls and self-facilitatesThe seller runs its own channel operator, charges only for consumed rows, and settles on-chain.
03 / 06Channel store now tracks locked escrowOpen channel deposits are held in escrow. Unspent amounts refund back to the budget when settled.
04 / 06MCP server adds five tools over stdioAI agents can fetch paid APIs, check budgets, list channels, and approve payments over stdio.
05 / 06Dashboard now displays channels and escrowThe dashboard shows locked escrow, lists channel states, and lets operators reclaim timed-out funds.
06 / 06Everything this change touchedSolana payment channels, the self-facilitated seller, escrow storage, and the MCP server.

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