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Wider = smoother tiers, narrower = more reactive."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"stats":{"type":"object","required":["blocks_sampled","median_fullness_pct","ts"],"properties":{"ts":{"type":"string","format":"date-time","description":"ISO 8601 timestamp when snapshot was assembled."},"blocks_sampled":{"type":"integer","description":"Number of recent blocks sampled for percentile calculation."},"median_fullness_pct":{"type":"number","description":"Median (gasUsed / gasLimit) × 100 across sampled blocks. 100 = full, 0 = empty."}},"description":"Sampling metadata: block count and median fullness."},"tiers":{"type":"object","properties":{"fast":{"type":"object","required":["max_fee_gwei","max_priority_gwei","maxFeePerGas","maxPriorityFeePerGas"],"properties":{"maxFeePerGas":{"type":"string","description":"DROP-IN: exact maxFeePerGas in wei. tx.maxFeePerGas = BigInt(this)."},"max_fee_gwei":{"type":"number","description":"maxFeePerGas in gwei (human-readable)."},"max_priority_gwei":{"type":"number","description":"maxPriorityFeePerGas (tip) in gwei (human-readable)."},"maxPriorityFeePerGas":{"type":"string","description":"DROP-IN: exact maxPriorityFeePerGas in wei (BigInt-ready)."}}},"slow":{"type":"object","required":["max_fee_gwei","max_priority_gwei","maxFeePerGas","maxPriorityFeePerGas"],"properties":{"maxFeePerGas":{"type":"string","description":"DROP-IN: exact maxFeePerGas in wei. tx.maxFeePerGas = BigInt(this)."},"max_fee_gwei":{"type":"number","description":"maxFeePerGas in gwei (human-readable)."},"max_priority_gwei":{"type":"number","description":"maxPriorityFeePerGas (tip) in gwei (human-readable)."},"maxPriorityFeePerGas":{"type":"string","description":"DROP-IN: exact maxPriorityFeePerGas in wei (BigInt-ready)."}}},"standard":{"type":"object","required":["max_fee_gwei","max_priority_gwei","maxFeePerGas","maxPriorityFeePerGas"],"properties":{"maxFeePerGas":{"type":"string","description":"DROP-IN: exact maxFeePerGas in wei. tx.maxFeePerGas = BigInt(this)."},"max_fee_gwei":{"type":"number","description":"maxFeePerGas in gwei (human-readable)."},"max_priority_gwei":{"type":"number","description":"maxPriorityFeePerGas (tip) in gwei (human-readable)."},"maxPriorityFeePerGas":{"type":"string","description":"DROP-IN: exact maxPriorityFeePerGas in wei (BigInt-ready)."}}}},"description":"Three fee tiers (slow p10, standard p50, fast p90). 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