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fix: skip proof query when CreatedAtBlockHeight is 0 for old epochs #973

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fix: skip proof query when CreatedAtBlockHeight is 0 for old epochs #973

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9 changes: 9 additions & 0 deletions decentralized-api/internal/server/public/get_participants_handler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -281,6 +281,15 @@ func queryActiveParticipants(rpcClient *rpcclient.HTTP, cdc *codec.ProtoCodec, e
// 2. The implemented proof system has a bug anyway and needs to be revisited

blockHeight := activeParticipants.CreatedAtBlockHeight

// If CreatedAtBlockHeight is 0 (old epochs before this field was populated),
// skip the proof query — CometBFT rejects height=0 with an error.
// Return the first query result directly instead.
if blockHeight == 0 {
logging.Warn("CreatedAtBlockHeight is 0 for epoch, skipping proof query", types.Participants)
return result, nil
}

result, err = cosmos_client.QueryByKeyWithOptions(rpcClient, "inference", dataKey, blockHeight, true)
if err != nil {
logging.Error("Failed to query active participant. Req 2", types.Participants, "error", err)
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