public static AltBN128MulPrecompiledContract istanbul(final GasCalculator gasCalculator) {
    return new AltBN128MulPrecompiledContract(gasCalculator, 6_000L);
  }
Create Istanbul AltBN128Mul precompiled contract.

@param gasCalculator the gas calculator
@return the alt bn 128 mul precompiled contract
evm/src/main/java/org/hyperledger/besu/evm/precompile/AltBN128MulPrecompiledContract.java