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Adds /receipt/voucher route that renders offchain payment channel state from a signed MPP voucher. Accepts channelId, cumulativeAmount, and signature as URL search params. - Reads channel state on-chain via the stream channel escrow contract - Verifies voucher signature via EIP-712 typed data recovery - Shows on-chain state (deposit, settled) alongside offchain state (cumulative amount, unsettled delta, remaining balance) - Displays channel status (open/closing/closed) and participants - Unverified signatures show a warning banner - noindex/nofollow to prevent voucher URL leakage via search engines Co-Authored-By: Georgios Konstantopoulos <17802178+gakonst@users.noreply.github.com> Amp-Thread-ID: https://ampcode.com/threads/T-019d9db9-63d7-70bb-be99-3c3693f8db6b
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Summary
Adds a
/receipt/voucherroute to the block explorer that renders offchain MPP payment channel state from a signed voucher. Users can paste a voucher via URL params (channelId,cumulativeAmount,signature) to inspect the current state of a payment channel.Motivation
For long-running MPP sessions, offchain state is invisible between channel open and close. This gives clients and servers a way to inspect the current channel state by combining on-chain data with a signed voucher — essentially a "channel inspector" embedded in the explorer.
Came from this discussion about improving visibility for MPP sessions.
Changes
apps/explorer/src/routes/_layout/receipt/voucher.tsx— new route that:getChannelon the stream channel escrow contractauthorizedSignernoindex,nofollow,noarchiveto prevent search engine indexing of voucher URLsapps/explorer/src/routeTree.gen.ts— wired up new routeUsage
Prompted by: georgios