monerolib

Monero JavaScript library.

Install

npm i monerolib

Common

• p - private/secret key, it is scalar
• P - public key, it is point
• pV - private/secret view key
• PV - public view key
• pS - private/secret spend key
• PS - public spend key
• HS() - convert hash to scalar hashToScalar
• G - is the base point

Key derivation generateKeyDerivation means:

derivation = P * p * 8

Subaddress

pSi = pS + HS(pV | i)
pVi = pV * pSi

PSi = PS + HS(pV | i) * G
PVi = pV * PSi

PSi = (pS + HS(pV | i)) * G
PVi = pV * (pS + HS(pV | i)) * G

Outputs

• r - is the transaction private/secret key
• R - is the transaction public key, txPubKey
• X - is the stealth address or one time address targetKey

Fro address:

// Address (it is public key)
R = r * G

// Subaddress (it is some public data)
R = r * PSi

Sending:

// Address
X = Hs(r * PV | i)G + PS

// Subaddress
X = Hs(r * PVi | i)G + PSi

Receiving:

// Address
X = Hs(R * pV|i)G + PS

// Subaddress
X = Hs(R * pV|i)G + PSi

It is equal because:

// Address
R * pV = r * G * pV = r * PV 

// Subaddress
R * pV = r * PSi * pV = r * PVi

r * PV and R * pV is a key derivation

Inputs

• Hp() - convert hash to point hashToPoint or more correctly hashToEc
• x - private/secret key of stealth address O_o
• J - is the key image keyImage

x = Hs(r * PV|i) + pS
x = Hs(R * pV|i) + pS

Key image is:

J = x * Hp(X)