use curve25519_dalek::edwards::EdwardsPoint;
use curve25519_dalek::scalar::Scalar;

pub type Secret = Scalar;

pub struct Share {}

pub struct Commitment {}

/// Create secret shares for a given secret.
pub fn generate_shares(secret: Secret, numshares: u32, threshold: u32) -> Result<(Commitment, Vec<Share>), &'static str> {
    unimplemented!("Not yet implemented")
}

/// Verify that a share is consistent with a commitment.
pub fn verify_share(share: Share, commitment: Commitment) -> Result<bool, &'static str> {
    unimplemented!("Not yet implemented")
}

/// Reconstruct the secret from enough (at least the threshold) already-verified shares.
pub fn reconstruct_secret(shares: &Vec<Share>) -> Result<Share, &'static str> {
    unimplemented!("Not yet implemented")
}

/// Create a proactive update.
pub fn create_update(numshares: u32, threshold: u32) -> Result<(Commitment, Vec<Share>), &'static str> {
    unimplemented!("Not yet implemented")
}

/// Apply the commitment for the update to the master commitment.
pub fn apply_commitment_update(oldcommitment: &Commitment, update: &Commitment) -> Result<Commitment, &'static str> {
    unimplemented!("Not yet implemented")
}

/// Apply the share update to an existing share
pub fn apply_share_update(oldshare: &Share, update: &Share) -> Result<Share, &'static str> {
    unimplemented!("Not yet implemented")
}