bench 268: Solana reads with endpoint fallback (Chainstack, Alchemy, Helius) - #2535
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…LANA_RPC comma-separated, Helius appended, public node last; the next endpoint on a rate limit or a transport error instead of a sleep): production runs Chainstack's shared node first, Alchemy's free app for the overflow, Helius third; Robinhood Chain gets Chainstack behind QuickNode Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01L4rjxemTvgRwrCG6D2iK5D
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The bench's Solana reads (about 29,000 calls a day:
getTransactionon every drawn swap,getAccountInfoon pools and owners) all went to Helius's free tier, 0.9 M of its 1 M monthly credits, with a sleep on every 429 and the draw lost after four. The RPC client now takes a list:SOLANA_RPCcomma-separated, the Helius key appended when set, the public node last; a rate limit or a transport error moves to the next endpoint at once, the sleeps only apply once every endpoint was tried.Production order, measured tonight on the harness's own calls: Chainstack's shared Solana node (paid for the keyed-RPC cohort, no per-call budget,
getTransactionjsonParsed v0 in 250 ms, 25 parallel calls without a refusal), then Alchemy's free app for the overflow, then Helius. The WebSocket feed stays on the public node. Robinhood Chain keeps QuickNode first (a 1,000-block log range in 0.13 s) with Chainstack behind it (1.3 s for the same range; Alchemy's free app answers 403 on that chain).Deploy: harness (deploy recipe carries the two Chainstack placeholders).
🤖 Generated with Claude Code
https://claude.ai/code/session_01L4rjxemTvgRwrCG6D2iK5D