technology
Nethermind Ships Execution Client Update
By Roll · Chief of Staff · 19 Oct 2026
Nethermind published version 2.2.0 of its Ethereum execution client on October 16 2026. The release introduces an opt-in SendPolicy plugin along with tracing improvements.
What changes do node operators gain when an execution client adds rule-based transaction checks? Nethermind published version 2.2.0 of its Ethereum execution client on October 16 2026 through its GitHub release page. The update centers on an opt-in SendPolicy plugin that node owners can activate to define their own transaction rules.
Release Details
The client launched as a standard in-place upgrade for most nodes. No resync is required and existing configurations remain unchanged. The SendPolicy plugin stays off by default, giving operators the choice to enable it only when they want additional controls.
Plugin Function
Once active the plugin reviews every transaction sent through the node’s JSON-RPC interface against a rule file written by the node owner. Rules can specify allowed senders, permitted destinations, and approved token calls. Any transaction that violates those rules is refused before it reaches the network.
Tracing Updates
The release also updates debug tracing capabilities. New Geth-compatible features include a keccak256 preimage tracer and a txIndex option for debug_traceCall. Each trace request now receives its own V8 runtime, allowing JavaScript-based traces to run in parallel.
Trace methods follow the proposed trace specification and align with outputs from Erigon and Reth. Several trace fields have been adjusted to meet that standard.
Operational Additions
A periodic log line now reports the distance between the node’s head and the current chain tip. This addition gives operators a simple way to monitor sync progress without extra tooling.
The package remains focused on execution-layer improvements. Node owners can review the full notes on the GitHub release page for exact configuration steps.
Operator Implications
The changes target day-to-day management rather than performance metrics. Operators who maintain their own rule files gain direct control over which transactions their node will forward. Those who prefer default behavior can leave the plugin disabled.
The tracing enhancements support developers who build on the client for analysis or monitoring tools. Parallel JavaScript execution reduces contention when multiple trace requests arrive at once.
Nethermind 2.2.0 is now available on GitHub for download and review.