Rusty Russell 2086699b70 common: add randbytes() wrapper to override cryptographic entropy: $CLN_DEV_ENTROPY_SEED ...

Only in developer mode, ofc.

Notes:
1. We have to move the initialization before the lightningd main trace_start,
   since that uses pseudorand().
2. To make the results stable, we need to use per-caller values to randbytes().
   Otherwise external timing changes the call order.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

2025-11-13 21:21:29 +10:30

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