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Currently we use
Default::default()
to get an all zeros hash. This is confusing because an all zeroes hash does not have a real meaning since there is no known input to create it. The all zeros hash is, however used by the Bitcoin network to signify certain things (e.g. the previous blockhash in the genesis block).Remove the
Default
implementation from theHash
trait and add aall_zeros
method instead. Remove theDefault
derive from any hash type that has it.To see the patch to
rust-bitcoin
that this PR imposes, check out this branch.Resolves #139