message: get consensus version from the given ledger
diff: @@ -298,6 +298,11 @@ impl Ledger {
  }
  }
  + pub fn consensus_version(&self) -> ConsensusVersion {
  + // TODO: this may be updated overtime (bft -> switch to genesis ?)
  + self.static_params.block0_consensus
  + }
  +
  pub fn utxos<'a>(&'a self) -> utxo::Iter<'a, Address> {
  self.utxos.iter()
  }
  