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Title: Quick question about valid chars for Bitcoin address Post by: BitcoinArsenal on May 27, 2017, 09:58:26 AM I tried to create a custom Bitcoin address with a vanity generator. The address should contain a 0 (zero) or capital O. According to the generator both characters are not valid. I instead chose a lower o which worked. But how are these both characters not allowed?
Title: Re: Quick question about valid chars for Bitcoin address Post by: ranochigo on May 27, 2017, 10:05:18 AM To the human eye, 0 looks similar to the uppercase O and uppercase i looks similar to l and 1. To avoid users mistaking the letters, uppercase o, 0, i and lowercase L are never used.
As to why lowercase O can be used, the size makes it obvious that its a lowercase O. Title: Re: Quick question about valid chars for Bitcoin address Post by: HCP on May 27, 2017, 10:10:28 AM This link will answer all your questions as to why: https://en.bitcoin.it/wiki/Base58Check_encoding
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