Is there an algorithm to convert a bech32 address into a list of English words that would make it even easier? Something like BIP39 but inverted (address to words instead of words to seed).
@Anonymous answer tries to answer the question in terms of dictation, but since the question is looking for BIP 39 inversion, I have tried to answer the question keeping that in mind. The number of words to dictate decrease significantly as well in this way. However, this transmits information without the error recovery and detection, in a way that requires a custom decoder. Moreover some wallets do not follow BIP-39 standards, and such derivation path may lead to potential loss of funds. BIP39 is also not designed for verbal unambiguity
You could design a software that takes words (similar to BIP39) from users and converts it to bech32 addresses. Let me take the example of bech32 address given in the BIP 173 documentation. So we have two addresses (1)
P2WPKH: bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4 and (2)
(1) P2WPKH: This is basically
base32encode of the witness version and the
hash160 of the public key. Decoding the bech32 address
bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4 gives us a witness version
00 and payload of
751e76e8199196d454941c45d1b3a323f1433bd6. Now, use this payload of 20 bytes as the entropy. For a 160 bit entropy, According to the BIP-39 documentation, we need to append first five bits of the checksum to the entropy that gives us total of 165 bits. Given each word of the BIP 39 mnemonic represents 11 unique bits, we can represent the P2WPKH address with 15 words. Use this tool and enter the entropy this gives the words as :
insect victory ring creek bonus health false logic easy mirror trip elevator before over fossil.
(2) P2WSH: This is basically base32encode of the witness version and the SHA256 of the script. Decoding the bech32 address
bc1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3qccfmv3 gives us witness version of
00 and payload of
1863143c14c5166804bd19203356da136c985678cd4d27a1b8c6329604903262.Use this 32 bytes of payload as the entropy. Since payload is 32 bytes, we need to use first 8 bits of the checksum. This gives us total size of 264 bits, which can be represented in 24 words (recall, each BIP 39 mnemonic word is 11 bits). Using the payload as entropy we get the words as:
blur board audit civil fabric cross base permit cage one repair chat sister clinic tobacco predict chicken assist cover gown gate elite sister flush