@Value.Default
  public Long getUpperBoundGasAndPriorityFeeCoefficient() {
    return DEFAULT_UPPER_BOUND_GAS_AND_PRIORITY_FEE_COEFFICIENT;
  }
Returns the upper bound coefficient for gas and priority fee. Default value is Long.MAX_VALUE.

@return the upper bound coefficient for gas and priority fee
ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/ApiConfiguration.java