Double spending on testnet or regtest? I'm currently doing a research on bitcoin and I would like to know if there is anyway to replicate double spending in the testnet or regtest? If isn't possible is there any other type of "attacks" that can be replicated?
If you have some hash power, you can perform Finney attacks on testnet. With regtest, you can perform any attack requiring 51% of the hash power since on regtest you are 100% of the hash power.