feat(metering): add base_meteredPriorityFeePerGas RPC endpoint #355
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- Add MeteringTestContext for unit tests that don't need a full node - Move meter.rs tests inline using MeteringTestContext (sync tests) - Move block.rs tests inline using MeteringTestContext (sync tests) - Move rpc.rs tests inline using TestHarness with MeteringExtension - Delete tests/ directory (all tests now inline) - Update lib.rs to expose test_utils with #[cfg(any(test, feature = "test-utils"))]
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Address PR review feedback: - Delete test_utils.rs and remove test-utils feature to avoid duplication - Use TestHarness from base-client-node for all tests - Remove envelope_from_signed helper - use direct conversion - Remove unused imports
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Add priority fee estimation based on single-block resource consumption: - Add core estimation algorithm (compute_estimate) that determines the minimum priority fee needed for inclusion based on resource demand vs capacity - Add ResourceKind, ResourceLimits, ResourceDemand types for multi-resource estimation - Add base_meteredPriorityFeePerGas RPC endpoint - Document the RPC response format in README.md
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Summary
Add a new RPC endpoint
base_meteredPriorityFeePerGasthat meters a bundle and returns a recommended priority fee based on resource consumption.This PR introduces the core estimation algorithm that answers: "What priority fee would my bundle need to pay to displace enough lower-paying transactions to free up the resources I need?"
Changes
base_meteredPriorityFeePerGasRPC endpoint that meters a bundle and estimates priority feesResourceKind,ResourceLimits,ResourceDemand,ResourceEstimatecompute_estimatealgorithm implementing top-down fee estimationestimate_from_transactionsfor single-block estimation from a list of transactionsAlgorithm
The estimation algorithm walks transactions from highest to lowest priority fee, accumulating resource usage until adding another transaction would leave insufficient capacity for the bundle. The last included transaction's fee becomes the threshold.
Response Format
{ "bundleGasPrice": "0x...", "bundleHash": "0x...", "results": [...], "totalGasUsed": 21000, "totalExecutionTimeUs": 1234, "priorityFee": "0x5f5e100", "blocksSampled": 1, "resourceEstimates": [ { "resource": "gasUsed", "thresholdPriorityFee": "0x...", ... }, { "resource": "executionTime", ... }, { "resource": "dataAvailability", ... } ] }Test Plan
compute_estimatecovering congested, uncongested, and edge casesestimate_from_transactions