43d89bb6e1
a318f43254bitcoin-util: Add netmagic command (ekzyis) Pull request description: This adds a `netmagic` command to `bitcoin-util`. It will return the network magic bytes of the selected chain: ``` $ bitcoin-util netmagic f9beb4d9 $ bitcoin-util -regtest netmagic fabfb5da $ bitcoin-util -testnet4 netmagic 1c163f28 $ bitcoin-util -signet netmagic 0a03cf40 # default challenge $ bitcoin-util -signet -signetchallenge=512103ad5e0edad18cb1f0fc0d28a3d4f1f3e445640337489abb10404f2d1e086be430210359ef5021964fe22d6f8e05b2463c9540ce96883fe3b278760f048f5189f2e6c452ae netmagic 0a03cf40 $ bitcoin-util -signet -signetchallenge=51 netmagic 54d26fbd ``` This will be particularly useful for https://github.com/bitcoin/bitcoin/pull/34566 to determine the datadir path of a custom signet, before starting bitcoind, since #34566 will add the network magic as a suffix. This was mentioned in https://github.com/bitcoin/bitcoin/pull/34566#issuecomment-4622356132. It uses the same code from init.cpp to print the signet derived magic:ea9afb61a1/src/init.cpp (L967-L969)Since it does not depend on #34566, and the changes are quite simple, I created a separate PR for this for easier review and discussion. I have tested this by invoking the command with the options above. ACKs for top commit: stickies-v: ACKa318f43254sedited: ACKa318f43254Tree-SHA512: bcb5a1b14260e13a35f5682e4dac735f472ab6ff7781e7e77aef5895ddbecc03a2fc72a26419ba9a28354736a1eaaeddb047bafe276440e339f17ddfe7841862
Bitcoin Core integration/staging tree
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