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genDelay used getRandomR(1, maxDelay) which caused undefined behavior when maxDelay was 0 (inverted bounds). In practice this leaked delay=1 even when the user configured maxTimeDelay or maxBlockDelay to 0. Change the lower bound to 0, which fixes the inverted bounds issue and also allows zero delays naturally (consecutive txs in same block/time), consistent with how genValue already uses getRandomR(0, ...).
Test that with maxTimeDelay: 0 and maxBlockDelay: 0, block numbers and timestamps remain consistent across transactions (no delay leaks).
gustavo-grieco
approved these changes
Mar 20, 2026
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