SHA1 removed for SHA256
Original change in https://github.com/ucoin-io/ucoin/issues/262
So, any reference to SHA1 can be replaced by SHA256. All the hashes are SHA256 hashes.
Original change in https://github.com/ucoin-io/ucoin/issues/262
So, any reference to SHA1 can be replaced by SHA256. All the hashes are SHA256 hashes.