3

a well known private key is the sha256 hash of correct horse battery staple it yields:

uncompressed address 1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T
compressed address 1C7zdTfnkzmr13HfA2vNm5SJYRK6nEKyq8

however i am unable to reproduce this result on pycoin 0.53. the sha256 hash is

c4bbcb1fbec99d65bf59d85c8cb62ee2db963f0fe106f483d9afa73bd4e39a8a

but when i use the command-line utility ku in pycoin to import this secret in hex it does not yield the above addresses:

$ ku H:c4bbcb1fbec99d65bf59d85c8cb62ee2db963f0fe106f483d9afa73bd4e39a8a

input                        : H:c4bbcb1fbec99d65bf59d85c8cb62ee2db963f0fe106f483d9afa73bd4e39a8a
network                      : Bitcoin mainnet
netcode                      : BTC
wallet key                   : xprv9s21ZrQH143K2yLSxbXemfny4nZroqhpiXEQ1MYx8vo2k7HRXypsWesNr7GkWT\
                                 uU9CeaW7QeR38NjjaSfZBAAZVkVEpXwEkxLLXP2q1iFUd
public version               : xpub661MyMwAqRbcFTQv4d4f8ojhcpQMDJRg5k9zojxZhGL1cuca5X984TBrhQw9ZJ\
                                 nvDdzsrjWG8nv4fsWjSU9HpX7pR3RKh2mezryhwXqvkF3
tree depth                   : 0
fingerprint                  : b501bac5
parent f'print               : 00000000
child index                  : 0
chain code                   : 5bbf1322eb26e8568dab5fdb60eb1dce21b0184ba5f6302a363d3d6fa673c630
private key                  : yes
secret exponent              : 10158881283648126355615721166211734569721037983262304808955335053160859610224
 hex                         : 1675b9196a0315b28d60cf62d835ca9e0c7756655f1ae267e72e87cd94f4ac70
wif                          : KwyNQchak8YmPrMjiZubCDbTGupAFPjQGp2A1mE2feyEkgjhPzNF
 uncompressed                : 5HzBHgMXJUYDKmiQGmACNaDLYhWiWziKsFjQLf7aTRv52NeoYhE
public pair x                : 51123819464118526280373633109955475860846079595385829435773454059765711587420
public pair y                : 69375255639189423482159707295881791099365542658018779127323111014791716296211
 x as hex                    : 71070e700787e78e1810b2843c0723fcf25643f9de9bb90fca95ca2941dd485c
 y as hex                    : 996100d13953e2d4815df164d89d27e8af148c31e2847631acc45928c89c5613
y parity                     : odd
key pair as sec              : 0371070e700787e78e1810b2843c0723fcf25643f9de9bb90fca95ca2941dd485c
 uncompressed                : 0471070e700787e78e1810b2843c0723fcf25643f9de9bb90fca95ca2941dd485c\
                                 996100d13953e2d4815df164d89d27e8af148c31e2847631acc45928c89c5613
hash160                      : b501bac5295fc5a812879a5483c456b554e0f994
 uncompressed                : c76a0a580bb6582e3f7e5e80324b0241b63f6eeb
Bitcoin address              : 1HW5NtrRYqmvvF36hxvGFf7e4F2voLyVk2
Bitcoin address uncompressed : 1KBQVzU9DnJCDZPe1r1T9SkrJAniJ2PUCx
6

looks like i was using pycoin wrong. for some reason the hex private key is not imported using a H:. the following works fine:

$ ku c4bbcb1fbec99d65bf59d85c8cb62ee2db963f0fe106f483d9afa73bd4e39a8a

input                        : c4bbcb1fbec99d65bf59d85c8cb62ee2db963f0fe106f483d9afa73bd4e39a8a
network                      : Bitcoin mainnet
netcode                      : BTC
secret exponent              : 88985120633792790105905686761572077713049967498756747774697023364147812997770
 hex                         : c4bbcb1fbec99d65bf59d85c8cb62ee2db963f0fe106f483d9afa73bd4e39a8a
wif                          : L3p8oAcQTtuokSCRHQ7i4MhjWc9zornvpJLfmg62sYpLRJF9woSu
 uncompressed                : 5KJvsngHeMpm884wtkJNzQGaCErckhHJBGFsvd3VyK5qMZXj3hS
public pair x                : 54652445751364966014814199642702485207468864303823415690143529040235143060593
public pair y                : 72966369330535479126907188414667138321635397511721864437822996012971795952725
 x as hex                    : 78d430274f8c5ec1321338151e9f27f4c676a008bdf8638d07c0b6be9ab35c71
 y as hex                    : a1518063243acd4dfe96b66e3f2ec8013c8e072cd09b3834a19f81f659cc3455
y parity                     : odd
key pair as sec              : 0378d430274f8c5ec1321338151e9f27f4c676a008bdf8638d07c0b6be9ab35c71
 uncompressed                : 0478d430274f8c5ec1321338151e9f27f4c676a008bdf8638d07c0b6be9ab35c71\
                                 a1518063243acd4dfe96b66e3f2ec8013c8e072cd09b3834a19f81f659cc3455
hash160                      : 79fbfc3f34e7745860d76137da68f362380c606c
 uncompressed                : c4c5d791fcb4654a1ef5e03fe0ad3d9c598f9827
Bitcoin address              : 1C7zdTfnkzmr13HfA2vNm5SJYRK6nEKyq8
Bitcoin address uncompressed : 1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T

i think ku H:c4bbcb1f... may be the way to import a bip32 private key, whereas ku c4bbcb1f... just imports a regular private key as secret exponent.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.