发送消息

向程序发送消息：

try {
  const message = {
    destination: destination, // programId
    payload: somePayload,
    gasLimit: 100_000_000,
    value: 1000,
  };
  // By default, the payload will be encoded using meta.handle_input type
  const submitted = await gearApi.message.submit(message, meta);

  // If you need to specify a different handler
  // For example
  await gearApi.message.submit(message, meta, meta.async_handle_input);
} catch (error) {
  console.error(`${error.name}: ${error.message}`);
}
try {
  await gearApi.message.signAndSend(keyring, (event) => {
    console.log(event.toHuman());
  });
} catch (error) {
  console.error(`${error.name}: ${error.message}`);
}

备注

在实际情况下，为确保成功处理信息，应通过使用api.program.calculateGas方法来计算处理信息所需的 gas。

请看更多相关信息

发送回复信息

当你需要回复从一个程序收到的信息时，请使用这个例子：

try {
  const reply = {
    replyToId: messageId,
    payload: somePayload,
    gasLimit: 10000000,
    value: 1000,
  };
  // In that case, the payload will be encoded using meta.async_handle_input type if it exists, if not it will be used meta.async_init_input

  const submitted = await gearApi.reply.submit(reply, meta);

  // If you need to specify a handler mannualy
  // For example
  await gearApi.reply.submit(reply, meta, meta.async_init_input);
} catch (error) {
  console.error(`${error.name}: ${error.message}`);
}
try {
  await gearApi.reply.signAndSend(keyring, (events) => {
    console.log(event.toHuman());
  });
} catch (error) {
  console.error(`${error.name}: ${error.message}`);
}