bitburner-src/src/NetscriptBladeburner.js

export function unknownBladeburnerActionErrorMessage(functionName, actionType, actionName) {
  return (
    `ERROR: bladeburner.${functionName}() failed due to an invalid action specified. ` +
    `Type: ${actionType}, Name: ${actionName}. Note that for contracts and operations, the ` +
    `name of the operation is case-sensitive.`
  );
}

export function unknownBladeburnerExceptionMessage(functionName, err) {
  return `bladeburner.${functionName}() failed with exception: ` + err;
}