dlc-manager 0.4.0

Creation and handling of Discrete Log Contracts (DLC).
Documentation 
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//! #

use bitcoin::PublicKey as BitcoinPublicKey;
use lightning::ln::chan_utils::{derive_public_key, derive_public_revocation_key};
use secp256k1_zkp::{PublicKey, Secp256k1, Signing, Verification};

use crate::error::Error;

pub(crate) fn derive_bitcoin_public_key<C: Signing>(
    secp: &Secp256k1<C>,
    per_commitment_point: &PublicKey,
    base_point: &PublicKey,
) -> Result<BitcoinPublicKey, Error> {
    let key = derive_public_key(secp, per_commitment_point, base_point)
        .map_err(|e| Error::InvalidParameters(format!("Invalid point was given {}", e)))?;
    Ok(BitcoinPublicKey {
        compressed: true,
        key,
    })
}

pub(crate) fn derive_bitcoin_public_revocation_key<C: Verification>(
    secp: &Secp256k1<C>,
    per_commitment_point: &PublicKey,
    countersignatory_revocation_base_point: &PublicKey,
) -> Result<BitcoinPublicKey, Error> {
    let key = derive_public_revocation_key(
        secp,
        per_commitment_point,
        countersignatory_revocation_base_point,
    )
    .map_err(|e| Error::InvalidParameters(format!("Could not derive revocation secret: {}", e)))?;
    Ok(BitcoinPublicKey {
        compressed: true,
        key,
    })
}