Compatibility: `tiny-secp256k1` vs. `secp256k1-node`

[eozturk1]

• How can private/public keys be generated with tiny-secp256k1?

secp256k1-node provides functions (See below) for verifying private keys (privateKeyVerify) and generating public keys from them (publicKeyCreate). Are there tiny-secp256k1 equivalents?

// generate privKey
let privKey
do {
  privKey = randomBytes(32)
} while (!secp256k1.privateKeyVerify(privKey))

// get the public key in a compressed format
const pubKey = secp256k1.publicKeyCreate(privKey)

• Can the pricate/public keys generated with tiny-secp256k1 or secp256k1-node be used with the other (e.g., generate private/public key using secp256k1-node and used it with sign (h, d)/verify (h, Q, signature[, strict = false]) of tiny-secp256k1?

[junderw]

1. pointFromScalar is publicKeyCreate and isPrivate is privateKeyVerify

---

pointFromScalar (d[, compressed])

pointFromScalar :: Buffer [-> Bool] -> Maybe Buffer

Returns null if result is at infinity.

Throws:

• Expected Private if !isPrivate(d)

---

isPrivate (d)

isPrivate :: Buffer -> Bool

Returns false if

• d is not 256-bit, or
• d is not in [1..order - 1]

---

2. Yes. The private and public keys are compatible between each other.