Merge #146: Export Blind*Proofs traits

ebc6b8e Export Blind*Proofs traits (Leonardo Comandini)

Pull request description:

  So that the traits methods can be used downstream.

ACKs for top commit:
  apoelstra:
    ACK ebc6b8e

Tree-SHA512: 06d4af81e82b91e8836b107f54771f355ac9ff302c65905a761478072f777925537c96b5a6f179fb757ea5853558039571d795b1d281059593c99c6bab0f41c1

src/blind.rs

@@ -869,6 +869,7 @@ impl From<ConfidentialTxOutError> for BlindError {
     }
 }
 
+/// A trait to create and verify explicit rangeproofs
 pub trait BlindValueProofs: Sized {
     /// Outputs a `[RangeProof]` that blinded value
     /// corresponfs to unblinded explicit value
@@ -939,6 +940,7 @@ impl BlindValueProofs for RangeProof {
     }
 }
 
+/// A trait to create and verify explicit surjection proofs
 pub trait BlindAssetProofs: Sized {
     /// Outputs a `[SurjectionProof]` that blinded asset
     /// corresponfs to unblinded explicit asset

src/lib.rs

@@ -65,7 +65,7 @@ pub use bitcoin::{bech32, hashes};
 // export everything at the top level so it can be used as `elements::Transaction` etc.
 pub use crate::address::{Address, AddressParams, AddressError};
 pub use crate::transaction::{OutPoint, PeginData, PegoutData, EcdsaSigHashType, TxIn, TxOut, TxInWitness, TxOutWitness, Transaction, AssetIssuance};
-pub use crate::blind::{ConfidentialTxOutError, TxOutSecrets, TxOutError, VerificationError, BlindError, UnblindError};
+pub use crate::blind::{ConfidentialTxOutError, TxOutSecrets, TxOutError, VerificationError, BlindError, UnblindError, BlindValueProofs, BlindAssetProofs};
 pub use crate::block::{BlockHeader, Block};
 pub use crate::block::ExtData as BlockExtData;
 pub use ::bitcoin::consensus::encode::VarInt;
@@ -74,4 +74,4 @@ pub use crate::hash_types::*;
 pub use crate::issuance::{AssetId, ContractHash};
 pub use crate::script::Script;
 pub use crate::sighash::SchnorrSigHashType;
-pub use crate::schnorr::{SchnorrSig, SchnorrSigError};
+pub use crate::schnorr::{SchnorrSig, SchnorrSigError};