enum Base58::Checksum
Overview
There are three checksum variants that are supported.
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Base58Check is the checksum algorithm used by Bitcoin. It combines an (optional) version/prefix to the front of the data payload with the data payload, and then an SHA256 hash is calculated from the combined prefix + payload. After that calculation, a second SHA256 hash is calculated from the first, and the first 4 bytes of that second hash are appended to the combined prefix + payload. The result is then Base58 encoded.
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CB58 is the checksum algorithm used by Avalanche. It combines an (optional) version/prefix to the front of the data payload with the data payload, and then an SHA256 hash is calculated from the combined prefix + payload. After that calculation, the first 4 bytes of the hash are appended to the combined prefix + payload. The result is then Base58 encoded. i.e. it is essentialy Base58Check without the second SHA256 hash.
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SS58 is the address format and checksum algorithm used by Substrate, the SDK for building Polkadot based blockchains. It combines an (optional) prefix/format code prepended to the data/address, with a variable length checksum appended to the end of the data/address. It uses the Blake2b hash function to calculate the checksum. The address specification for Substrate has a highly constrained definition regarding what a valid input and output looks like. When encoding Substrate addresses, those conventions must be followed. See the
Base58::SS58documentation for more details about this, as well as methods specifically for encoding and decoding Substrate addresses. The algorithm can be used for any data, however, just as with the other two checksum variants.
Defined in:
base58/checksum.crEnum Members
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Base58Check =
0 -
CB58 =
1 -
SS58 =
2
Class Method Summary
- .calculate(check : Check, value, size)
- .register(type : Checksum, &block : Base58::Check, Pointer(UInt8), Int32 -> Tuple(Pointer(UInt8), Slice(UInt8)))