public Prepare createPrepare(final ConsensusRoundIdentifier roundIdentifier, final Hash digest) {
    final PreparePayload payload = new PreparePayload(roundIdentifier, digest);
    return new Prepare(createSignedMessage(payload));
  }
Create Prepare payload.

@param roundIdentifier the round identifier
@param digest the digest
@return the prepare
consensus/qbft-core/src/main/java/org/hyperledger/besu/consensus/qbft/core/payload/MessageFactory.java