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Can anybody inform me how I can get the prolonged public key from an prolonged personal key in python. I do know that I have to get the general public key from the personal key and that the general public key + chain key = prolonged public key. I have already got the general public key in a number of varieties however I do not know which one to make use of.
Prolonged Personal Key: 961901f50868df03db40e0a29d40092b3fc26f47a1c20540d1440be1cd70edbef9c82ec85c4f90a24a1f7a4f1de97ddf762bcb20142b12e9b6c3e348e5519b74
Personal key: 961901f50868df03db40e0a29d40092b3fc26f47a1c20540d1440be1cd70edbe
Chain Code: f9c82ec85c4f90a24a1f7a4f1de97ddf762bcb20142b12e9b6c3e348e5519b74
PREPENDED: 80961901F50868DF03DB40E0A29D40092B3FC26F47A1C20540D1440BE1CD70EDBE
PRIV_UNCOMP+CHECKSUM: 80961901F50868DF03DB40E0A29D40092B3FC26F47A1C20540D1440BE1CD70EDBE223FDFAE
Private_key_WIF_uncompressed_Base58: 5JxPdEGBsaP14hBpr3swh2GZeXctQdLn9ZvjyFEj6diN742em4R
PRIV_COMP+CHECKSUM: 80961901F50868DF03DB40E0A29D40092B3FC26F47A1C20540D1440BE1CD70EDBE0151EA0003
Private_key_WIF_compressed_Base58: L2FUruY2zEL7HJNnBVhrPebh6e9PuHQJGpLCfFqaos3a9eeosKVL
('5JxPdEGBsaP14hBpr3swh2GZeXctQdLn9ZvjyFEj6diN742em4R', 'L2FUruY2zEL7HJNnBVhrPebh6e9PuHQJGpLCfFqaos3a9eeosKVL')
Personal key hex string: 961901F50868DF03DB40E0A29D40092B3FC26F47A1C20540D1440BE1CD70EDBE
Personal key bytes: b'x96x19x01xf5x08hxdfx03xdb@xe0xa2x9d@t+?xc2oGxa1xc2x05@xd1Dx0bxe1xcdpxedxbe'
Verifying key, x and y factors (bytes): b'E.1xc8Zx02xf6x1e$x9dxf1xcfxc3x10x8ffx06x14UxceL3xf8xabOxbfx1crxe4xf6xf1x1cmxb9xc3x16xed6xbbx0cxe4xeaQx1b^Wxdex8dxd5xacx822Zxeaxcb#x82xf1xdaxb8x12xfdx8fxa9' <class 'bytes'>
Uncompressed personal key (hex): 04452E31C85A02F61E249DF1CFC3108F66061455CE4C33F8AB4FBF1C72E4F6F11C6DB9C316ED36BB0CE4EA511B5E57DE8DD5AC82325AEACB2382F1DAB812FD8FA9
Compressed personal key in (hex): 02452E31C85A02F61E249DF1CFC3108F66061455CE4C33F8AB4FBF1C72E4F6F11C
Public compressed key (hex): 13w1yEAhhMGk6E5UU2wGQyy7pP14K1q2tg
Prolonged Public Key: ?
Thanks!
From BIP32:
We symbolize an prolonged personal key as (ok, c), with ok the conventional
personal key, and c the chain code. An prolonged public secret is
represented as (Okay, c), with Okay = level(ok) and c the chain code.
level(p): returns the coordinate pair ensuing from EC level
multiplication (repeated software of the EC group operation) of the
secp256k1 base level with the integer p.ser256(p): serializes the integer p as a 32-byte sequence,
most important byte first.serP(P): serializes the coordinate pair P = (x,y) as a byte
sequence utilizing SEC1’s compressed type: (0x02 or 0x03) ||
ser256(x), the place the header byte depends upon the parity of
the omitted y coordinate.
Prolonged private and non-private keys are serialized as follows:
- 4 byte: model bytes (mainnet: 0x0488B21E public, 0x0488ADE4 personal; testnet: 0x043587CF public, 0x04358394 personal)
- 1 byte: depth: 0x00 for grasp nodes, 0x01 for level-1 derived keys, ….
- 4 bytes: the fingerprint of the guardian’s key (0x00000000 if grasp key)
- 4 bytes: little one quantity. That is ser32(i) for i in xi = xpar/i, with xi the important thing being serialized. (0x00000000 if grasp key)
- 32 bytes: the chain code
- 33 bytes: the general public key or personal key information (serP(Okay) for public keys, 0x00 || ser256(ok) for personal keys)
This 78 byte construction will be encoded like different Bitcoin information in
Base58, by first including 32 checksum bits (derived from the double
SHA-256 checksum), after which changing to the Base58 illustration.
This ends in a Base58-encoded string of as much as 112 characters.
Thus the prolonged public key (xpub) will be derived from the prolonged personal key (xprv) as follows:
- Convert the xprv from Base58 to bytes and extract the personal key from the final 33 bytes (ignoring the checksum).
- Calculate the general public key from the personal key as per level(p).
- Serialize the outcome:
- 4 bytes: 0x0488B21E (mainnet) or 0x043587CF (testnet)
- 41 bytes: depth, guardian fingerprint, little one quantity and chain code are the identical as within the xprv
- 33 bytes: public key serialized utilizing serP(Okay)
- Add the 4-byte checksum and convert to Base58.
answered Jul 21, 2022 at 16:49
