Function applyStackItemTransformations

packages/cashscript/src/debugging.ts:262–290

(
  element: StackItem,
  debugStep: AuthenticationProgramStateCommon,
  vm: VM,
)

};

const applyStackItemTransformations = (
  element: StackItem,
  debugStep: AuthenticationProgramStateCommon,
  vm: VM,
): AuthenticationProgramStateCommon => {
  if (!element.transformations) return debugStep;

  const transformationsBytecode = asmToBytecode(element.transformations);
  const transformationsAuthenticationInstructions = decodeAuthenticationInstructions(transformationsBytecode);

  const transformationsStartState: AuthenticationProgramStateCommon = {
    alternateStack: [...debugStep.alternateStack],
    controlStack: [],
    ip: 0,
    lastCodeSeparator: -1,
    metrics: {} as any,
    stack: [...debugStep.stack],
    operationCount: 0,
    instructions: transformationsAuthenticationInstructions,
    signedMessages: [],
    program: { ...debugStep.program },
    functionTable: debugStep.functionTable ?? {},
    functionCount: debugStep.functionCount ?? 0,
  };

  const transformationsEndState = vm.stateEvaluate(transformationsStartState);

  return transformationsEndState;
};

const decodeStackItem = (element: StackItem, stack: Uint8Array[]): string | bigint | boolean => {
  // Reversed since stack is in reverse order