chore(fallback): migrate to fallback rpc endpoint for log data

[BZahory]

Summary

• Migrate the eth_getLogs transport from the Marble/Ponder indexer (v1-indexer.marble.live) to the new fallback-rpc caching proxy (fallback-rpc.vercel.app)
• Rename createPonderHttp to createFallbackRpcHttp to reflect the new backing service
• Add comments noting which events are whitelisted for the private RPC log service

Details

The fallback app previously relied on https://v1-indexer.marble.live/rpc/{chainId} as a prioritized eth_getLogs transport. This PR swaps it to https://fallback-rpc.vercel.app/{chainId}, a new caching proxy that serves the same role -- accepting only eth_getLogs requests and caching results. The transport config (batch: false, methods: { include: ["eth_getLogs"] }) and all call sites remain unchanged.

Comments were added to earn-subpage.tsx and borrow-subpage.tsx to document which event names (CreateMetaMorpho, SupplyCollateral) are explicitly whitelisted by the private RPC log service.

Test plan

• Confirm eth_getLogs requests route to fallback-rpc.vercel.app on chains with full support (Mainnet, Base, Polygon, Unichain, Katana, Arbitrum, HyperEVM, Monad, Stable, Sei, TAC)
• Verify vault and market data renders correctly in the UI
• Confirm public RPC fallback still works if the new service is unreachable

[linear]

CRTR-1869 Integrate fallback-rpc as eth_getLogs transport in morpho-lite-apps

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
lite-app	Skipped		Mar 2, 2026 3:43pm

[BZahory]

Prod deployed and smoke testing looks good:

Smoke testing against https://fallback-rpc.vercel.app (all chains)

✓ smoke tests > GET /health returns 200 with status ok [848.35ms]
✓ smoke tests > unsupported method returns -32601 [124.57ms]
✓ smoke tests > unsupported chain ID returns -32602 [52.33ms]
✓ smoke tests > empty filter returns -32602 [44.91ms]
✓ smoke tests > unknown address without topics returns -32602 [45.16ms]
✓ smoke tests > unknown address + excluded Transfer topic returns -32602 [43.77ms]
✓ smoke tests > null body returns -32600 [47.96ms]
✓ smoke tests > array body returns -32600 [46.35ms]
✓ smoke tests > unknown address + non-Morpho topic returns -32602 [45.28ms]
✓ smoke tests > mixed known + unknown address array returns -32602 [45.18ms]
✓ smoke tests > invalid address type returns -32600 [52.03ms]
✓ smoke tests > invalid topics[0] type returns -32600 [60.54ms]
✓ smoke tests > missing params returns -32602 [52.37ms]
✓ smoke tests > MorphoBlue address + SupplyCollateral topic passes validation [206.60ms]
✓ smoke tests > unknown address + whitelisted topic is rejected [57.12ms]
✓ per-chain reachability > Chain 1 (Ethereum) is reachable [58.76ms]
✓ per-chain reachability > Chain 10 (OP Mainnet) is reachable [90.37ms]
✓ per-chain reachability > Chain 56 (BNB Smart Chain) is reachable [65.00ms]
✓ per-chain reachability > Chain 130 (Unichain) is reachable [87.47ms]
✓ per-chain reachability > Chain 137 (Polygon) is reachable [59.02ms]
✓ per-chain reachability > Chain 143 (Monad Mainnet) is reachable [68.04ms]
✓ per-chain reachability > Chain 146 (Sonic) is reachable [314.98ms]
✓ per-chain reachability > Chain 239 (TAC) is reachable [91.20ms]
✓ per-chain reachability > Chain 252 (Fraxtal) is reachable [529.14ms]
✓ per-chain reachability > Chain 480 (World Chain) is reachable [75.36ms]
✓ per-chain reachability > Chain 988 (Stable) is reachable [78.67ms]
✓ per-chain reachability > Chain 999 (HyperEVM) is reachable [328.64ms]
✓ per-chain reachability > Chain 1135 (Lisk) is reachable [205.32ms]
✓ per-chain reachability > Chain 1868 (Soneium Mainnet) is reachable [334.54ms]
✓ per-chain reachability > Chain 2741 (Abstract) is reachable [81.91ms]
✓ per-chain reachability > Chain 8453 (Base) is reachable [65.85ms]
✓ per-chain reachability > Chain 34443 (Mode Mainnet) is reachable [70.77ms]
✓ per-chain reachability > Chain 42161 (Arbitrum One) is reachable [243.19ms]
✓ per-chain reachability > Chain 42220 (Celo) is reachable [84.24ms]
✓ per-chain reachability > Chain 42793 (Etherlink) is reachable [89.19ms]
✓ per-chain reachability > Chain 43111 (Hemi) is reachable [286.50ms]
✓ per-chain reachability > Chain 57073 (Ink) is reachable [124.39ms]
✓ per-chain reachability > Chain 59144 (Linea Mainnet) is reachable [76.26ms]
✓ per-chain reachability > Chain 98866 (Plume) is reachable [263.40ms]
✓ per-chain reachability > Chain 534352 (Scroll) is reachable [334.00ms]
✓ per-chain reachability > Chain 747474 (Katana) is reachable [226.02ms]
✓ per-chain reachability > Chain 11155111 (Sepolia) is reachable [67.03ms]
✗ per-chain reachability > Chain 21000000 (Corn) is reachable [15001.05ms]
  ^ this test timed out after 15000ms.

1 tests failed:
✗ per-chain reachability > Chain 21000000 (Corn) is reachable [15001.05ms]
  ^ this test timed out after 15000ms.

 42 pass
 1 fail
 42 expect() calls
Ran 43 tests across 1 file. [21.31s]
 ELIFECYCLE  Command failed with exit code 1.

The only error is a 429 on Corn:

Status: 429
URL: https://21000000.rpc.thirdweb.com
Request body: {"method":"eth_getLogs","params":[{"address":"0xc2B1E031540e3F3271C5F3819F0cC7479a8DdD90","topics":["0xa3b9472a1399e17e123f3c2e6586c23e504184d504de59cdaa2b375e880c6184"],"fromBlock":"0x0","toBlock":"0x270f"}]}

Details: "You are using a public-good RPC with strict rate limits. To lift these limits you can obtain an api key for free at https://thirdweb.com/create-api-key"
Version: viem@2.35.1
    details: "\"You are using a public-good RPC with strict rate limits. To lift these limits you can obtain an api key for free at https://thirdweb.com/create-api-key\"",
   docsPath: undefined,
 metaMessages: [
  "Status: 429", "URL: https://21000000.rpc.thirdweb.com", "Request body: {\"method\":\"eth_getLogs\",\"params\":[{\"address\":\"0xc2B1E031540e3F3271C5F3819F0cC7479a8DdD90\",\"topics\":[\"0xa3b9472a1399e17e123f3c2e6586c23e504184d504de59cdaa2b375e880c6184\"],\"fromBlock\":\"0x0\",\"toBlock\":\"0x270f\"}]}"
],
 shortMessage: "HTTP request failed.",
    version: "2.35.1",
       body: {
  method: "eth_getLogs",
  params: [
    [Object ...]
  ],
},
    headers: Headers {
  "date": "Mon, 02 Mar 2026 14:42:21 GMT",
  "content-type": "text/plain",
  "content-length": "151",
  "connection": "keep-alive",
  "cache-control": "private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0",
  "expires": "Thu, 01 Jan 1970 00:00:01 GMT",
  "referrer-policy": "same-origin",
  "x-frame-options": "SAMEORIGIN",
  "report-to": "{\"group\":\"cf-nel\",\"max_age\":604800,\"endpoints\":[{\"url\":\"https://a.nel.cloudflare.com/report/v4?s=uV%2FozhADYBONKy6mKmlWKZE%2BBK3%2Bz1NEp%2F5LW7z4icz5x33EvytBqc0Y0QteqmlL5EYBqCE836OyAv%2F%2BmHZIXSyBAIJapzoNJ9H2RDusrmv6NNekfk1mRA%3D%3D\"}]}",
  "retry-after": "0",
  "nel": "{\"report_to\":\"cf-nel\",\"success_fraction\":0.0,\"max_age\":604800}",
  "server": "cloudflare",
  "cf-ray": "9d612ae4efbb883e-IAD",
}