@aws-sdk/client-managedblockchain-query
Advanced tools
AWS SDK for JavaScript Managedblockchain Query Client for Node.js, Browser and React Native
AWS SDK for JavaScript ManagedBlockchainQuery Client for Node.js, Browser and React Native.
Amazon Managed Blockchain (AMB) Query provides you with convenient access to multi-blockchain network data, which makes it easier for you to extract contextual data related to blockchain activity. You can use AMB Query to read data from public blockchain networks, such as Bitcoin Mainnet and Ethereum Mainnet. You can also get information such as the current and historical balances of addresses, or you can get a list of blockchain transactions for a given time period. Additionally, you can get details of a given transaction, such as transaction events, which you can further analyze or use in business logic for your applications.
To install the this package, simply type add or install @aws-sdk/client-managedblockchain-query using your favorite package manager:
npm install @aws-sdk/client-managedblockchain-queryyarn add @aws-sdk/client-managedblockchain-querypnpm add @aws-sdk/client-managedblockchain-queryThe AWS SDK is modulized by clients and commands.
To send a request, you only need to import the ManagedBlockchainQueryClient and
the commands you need, for example ListTokenBalancesCommand:
// ES5 example
const { ManagedBlockchainQueryClient, ListTokenBalancesCommand } = require("@aws-sdk/client-managedblockchain-query");
// ES6+ example
import { ManagedBlockchainQueryClient, ListTokenBalancesCommand } from "@aws-sdk/client-managedblockchain-query";
To send a request, you:
send operation on client with command object as input.destroy() to close open connections.// a client can be shared by different commands.
const client = new ManagedBlockchainQueryClient({ region: "REGION" });
const params = {
/** input parameters */
};
const command = new ListTokenBalancesCommand(params);
We recommend using await operator to wait for the promise returned by send operation as follows:
// async/await.
try {
const data = await client.send(command);
// process data.
} catch (error) {
// error handling.
} finally {
// finally.
}
Async-await is clean, concise, intuitive, easy to debug and has better error handling as compared to using Promise chains or callbacks.
You can also use Promise chaining to execute send operation.
client.send(command).then(
(data) => {
// process data.
},
(error) => {
// error handling.
}
);
Promises can also be called using .catch() and .finally() as follows:
client
.send(command)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
})
.finally(() => {
// finally.
});
We do not recommend using callbacks because of callback hell, but they are supported by the send operation.
// callbacks.
client.send(command, (err, data) => {
// process err and data.
});
The client can also send requests using v2 compatible style. However, it results in a bigger bundle size and may be dropped in next major version. More details in the blog post on modular packages in AWS SDK for JavaScript
import * as AWS from "@aws-sdk/client-managedblockchain-query";
const client = new AWS.ManagedBlockchainQuery({ region: "REGION" });
// async/await.
try {
const data = await client.listTokenBalances(params);
// process data.
} catch (error) {
// error handling.
}
// Promises.
client
.listTokenBalances(params)
.then((data) => {
// process data.
})
.catch((error) => {
// error handling.
});
// callbacks.
client.listTokenBalances(params, (err, data) => {
// process err and data.
});
When the service returns an exception, the error will include the exception information, as well as response metadata (e.g. request id).
try {
const data = await client.send(command);
// process data.
} catch (error) {
const { requestId, cfId, extendedRequestId } = error.$metadata;
console.log({ requestId, cfId, extendedRequestId });
/**
* The keys within exceptions are also parsed.
* You can access them by specifying exception names:
* if (error.name === 'SomeServiceException') {
* const value = error.specialKeyInException;
* }
*/
}
Please use these community resources for getting help. We use the GitHub issues for tracking bugs and feature requests, but have limited bandwidth to address them.
aws-sdk-js
on AWS Developer Blog.aws-sdk-js.To test your universal JavaScript code in Node.js, browser and react-native environments, visit our code samples repo.
This client code is generated automatically. Any modifications will be overwritten the next time the @aws-sdk/client-managedblockchain-query package is updated.
To contribute to client you can check our generate clients scripts.
This SDK is distributed under the Apache License, Version 2.0, see LICENSE for more information.
3.468.0 (2023-12-06)
FAQs
AWS SDK for JavaScript Managedblockchain Query Client for Node.js, Browser and React Native
The npm package @aws-sdk/client-managedblockchain-query receives a total of 244 weekly downloads. As such, @aws-sdk/client-managedblockchain-query popularity was classified as not popular.
We found that @aws-sdk/client-managedblockchain-query demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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