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fix: switch RPC if block number is less than last recorded block number #1264

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fix: switch RPC if block number is less than last recorded block number #1264

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20 changes: 20 additions & 0 deletions block/block.go
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,26 @@ func (bm *BlockMonitor) updateLatestBlock() {
bm.mu.Lock()
defer bm.mu.Unlock()

// Check if the fetched block number is less than the last recorded block number.
if bm.latestBlock != nil && header.Number.Uint64() < bm.latestBlock.Number.Uint64() {
logrus.Warnf("Fetched block number %d is less than the last recorded block number %d. Switching to the next best RPC endpoint.",
header.Number.Uint64(), bm.latestBlock.Number.Uint64())

// Attempt to switch to the next best RPC endpoint.
if bm.rpcManager != nil {
switched, err := bm.rpcManager.SwitchToNextBestRPCClient()
if err != nil {
logrus.Errorf("Failed to switch RPC endpoint: %v", err)
} else if switched {
logrus.Info("Switched to the next best RPC endpoint.")
bm.updateClient()
} else {
logrus.Warn("Retaining the current best RPC endpoint as no valid alternate was found.")
}
}
return
}

// Update the latest block only if it changes.
if bm.latestBlock == nil || header.Number.Uint64() != bm.latestBlock.Number.Uint64() {
bm.latestBlock = header
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