Remove Ponder: read cohort events from the chain - #4
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Replace the urql/GraphQL layer that queried the bg-ponder-indexer
Railway service with a direct eth_getLogs call via Alchemy.
- Add services/web3/cohortEvents.ts: one getLogs for SandGardenStreams
from its deploy block, parsed with the contract ABI, plus batched
getBlock calls for the Withdraw timestamps. Cached per browser session
and shared by both hooks.
- Rewrite useCohortWithdrawEvents and useAddBuilderEvents on top of it,
keeping their { data, isLoading } shape. AddBuilder now returns plain
addresses, so members.tsx drops the id-splitting.
- Drop the urql client and provider from _app.tsx and the urql dep.
- Set SandGardenStreams fromBlock to 20291636.
- Delete the stale root builderList.ts and its commented-out usage.
Verified on mainnet: 105 Withdraw and 9 unique AddBuilder events.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011KuwowZj4dS3eshnHT5uoM
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Replaces the urql/GraphQL layer that queried the
bg-ponder-indexerRailway service with a directeth_getLogscall via Alchemy.Context: BuidlGuidl/bg-redirects#1 (step 2).
Changes
services/web3/cohortEvents.ts— onegetLogsforSandGardenStreamsfrom its deploy block, parsed with the contract ABI, plus batchedgetBlockcalls for theWithdrawtimestamps. Cached per browser session and shared by both hooks.useCohortWithdrawEventsanduseAddBuilderEventsrewritten on top of it, keeping their{ data, isLoading }shape.AddBuildernow returns plain addresses, somembers.tsxdrops the id-splitting._app.tsx;urqldep dropped.SandGardenStreamsfromBlockset to20291636.builderList.tsdeleted, along with its commented-out usage in the hardhat deploy script.Verification
Against mainnet: 105
Withdrawand 9 uniqueAddBuilderevents, 0 missing timestamps, 0 duplicate ids, sorted newest first (2026-08-06 → 2024-09-02).UI checked on
/membersand/projects— both render correctly, with no requests tobg-ponder-indexer-production.up.railway.app.next:check-types,next:lint,hardhat:lint, andnext buildall pass.After merge
Railway service + Postgres teardown.
🤖 Generated with Claude Code
https://claude.ai/code/session_011KuwowZj4dS3eshnHT5uoM