Bitcoin/address validation: Difference between revisions
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* the first byte is the version number, which will be zero for this task ;
* the next twenty bytes are a [[RIPEMD-160]] digest, but you don't have to know that for this task: you can consider them a pure arbitrary data ;
* the last four bytes are a checksum check. They are the first four bytes of a double [[
To check the bitcoin address, you must read the first bytes, compute the checksum, and check that it corresponds to the last four bytes.
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