Bech32
Addresses that carry their own error-detecting checksum, demoing the p/moul/x/daily/bech32 library.
A gno.land address, taken apart
Decoding g1manfred47kzduec920z88wfr64ylksmdcedlf5:
| field | value |
|---|---|
| human-readable part | g |
| variant | bech32 |
| payload | 20 bytes |
| payload (hex) | df6691e5b5f584de670553c473b923d549fb436d |
The two variants
Same string shape, same data, different checksum constant: 1 for Bech32, 0x2bc830a3 for Bech32m.
| Bech32 (BIP-173) | Bech32m (BIP-350) |
|---|---|
a12uel5l |
a1lqfn3a |
?1ezyfcl |
?1v759aa |
split1checkupstagehandshakeupstreamerranterredcaperred2y9e3w |
split1checkupstagehandshakeupstreamerranterredcaperredlc445v |
Why Bech32m exists
A Bech32 string ending in p keeps a valid checksum when q characters are inserted in front of that final p, so a reader accepts a string nobody wrote. Bech32m's constant closes it:
| string | variant | verdict |
|---|---|---|
a1q3g6mnsp |
bech32 | accepted |
a1q3g6mnsqp |
bech32 | accepted |
a1q6dp699p |
bech32m | accepted |
a1q6dp699qp |
- | rejected: bech32: bad checksum |
Pass a string of your own to decode it: Render("/<bech32 string>").
