- Add retry mechanism with exponential backoff for block broadcast loop
- Implement max 5 retries with 2s base delay for RPC connection failures
- Reset retry count on successful connection
- Add 20s wait period after max retries before resetting counter
- Add retry logic for block import with 3 attempts and 1s base delay
- Handle non-200 HTTP responses as exceptions to trigger retries
- Improve error logging
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