How to convert a Wallet Address into a Public Key

Developers
, , ,
1 
import bech32

wallet_address = "rdx1q...."

_hrp, wallet_readdr_5bit = bech32.bech32_decode(wallet_address)
wallet_readdr = bech32.convertbits(wallet_readdr_5bit, 5, 8, pad=False)

# Remove the Radix Engine Address 04 prefix byte
wallet_public_key = wallet_readdr[1:34]

print("Wallet Public Key:", bytes(wallet_public_key).hex())

Run this code on Replit:

Also see: How to convert a Public Key into a Wallet Address

2 Likes
2

Is this also the correct way to validate an Radix address? Is there any other methods to check to make sure an Radix address is valid or not?

3

The Bech32 algorithm has 6 character checksum that “gives a chance of less than 1 in a billion that an invalid address is deemed correct”.

So given a Radix wallet address, you can validate it by using the Bech32 decode function and then:

  1. Checking the data part is 34 bytes long
  2. Checking that the first byte is 04 - which defines it as a Radix Engine Address
  3. Checking that the second byte is either 02 or 03 - to indicate that it is a compressed public key

Further Reading:
https://medium.com/@meshcollider/some-of-the-math-behind-bech32-addresses-cf03c7496285

4

Thanks for your reply, I also add the checking for _hrp (returned by method bech32_decode) to make sure it is “rdx”

5

here are the hrp’s of addresses radixdlt/Network.java at main · radixdlt/radixdlt · GitHub

1 Like