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Testcases to generate via bitcoin-core regtest mode:

Notation:

• k - security parameter defined, example defined for testing

• Mine k blocks

• Send transaction, mine k blocks on top

• Mine 1 block, fork that block, mine k blocks on new main chain

• Mine k blocks on one chain, mine k block on another chain, and another k blocks on a 3rd chain. Used for following test cases:

  • Mine 1 block, submit 2 blocks on other chain, submit another k blocks on first chain
  • Mine 1 blocks on 1st chain, start fork submission with 1 block, start another fork submission with 1 block, submit 1 block on 1st chain, submit 2 blocks on 2nd for (becoming main chain), submit 3 blocks on 3rd chain (becoming main chain), submit rest of k-2 blocks on 1st chain (overriding others and becoming main chain)

• Mine 2k blocks - k before diff adjustment, k after diff adjustment.

• Mine k blocks starting pos. 0, mine blocks until diff adjustment:

  • record k blocks with diff
  • record k blocks without diff adjustment

...

Check old btcrelay for more testcases