Token-Bucket Rate Limiting Tool Shields Hyperledger Fabric Endorsement Nodes

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An open-source Python library called wFabricSecurity has introduced token-bucket rate limiting to protect Hyperledger Fabric endorsement nodes from resource exhaustion attacks. The tool addresses a key vulnerability where ECDSA signature verification, being computationally intensive, can be exploited by flooding nodes with excessive requests. wFabricSecurity throttles incoming endorsement requests on a per-node basis using Common Name or IP address, rejecting abusive spikes before costly cryptographic operations are triggered. The library supports burst handling while enforcing sustained rate caps, and raises a RateLimitError when limits are exceeded. It is compatible with Python 3.10 and above, and is available on both GitHub and PyPI.

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Claude AI Agent Autonomously Fixes Bugs, Pushes Code, and Files Merge Requests Overnight

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