@Override
  public Collection<Address> getValidatorsForBlock(final BlockHeader header) {
    final Address contractAddress = resolveContractAddress(header.getNumber());
    return getValidatorsFromContract(forBlockValidatorCache, header, contractAddress);
  }
Instantiates a new Transaction validator provider.

@param blockchain the blockchain
@param validatorContractController the validator contract controller
@param forksSchedule the forks schedule
consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/validator/TransactionValidatorProvider.java