As a web3 developer working on Ethereum blockchain, you've likely come across the problem of trying to retrieve historical data. Traditional methods involve manually scanning through blocks and transactions, which can be slow and tedious. Imagine having to sift through thousands of blocks and interactions just to find the information you need. Yet alone, multiple blockchains!

While eth_getLogs can be an option for devs to make sense of the blockchain data on Ethereum, what if there was a way to easily and quickly retrieve log entries that match specific filter criteria across eight different blockchains? This is where **ankr_getLogs** comes in.

## Releasing ankr_getLogs

As a developer, you need efficient and accurate ways of retrieving historical data to make informed decisions and implement your business logic. ankr_getLogs offers a solution to this problem by providing an easy and fast way to access historical data on the Ethereum blockchain and seven other chains, including:

- Polygon
- BSC
- Fantom
- Avalanche
- Syscoin
- Optimism
- and Arbitrum

## Getting the Most Out of ankr_getLogs?

**ankr_getLogs** is a JSON-RPC method that allows for the retrieval of log entries that match specific filter criteria. It makes it possible for you to retrieve log entries with ease and speed. 

Log entries are a way for smart contracts to record events that have occurred on the blockchain. When a contract emits an event, it creates a log entry that contains information about the event. This can include things like the **contract address**, the **event name**, and any **indexed parameters**. Log entries are important because they provide a way for external parties to track what is happening within a contract and to respond to events that occur.

### Retrieving Event Logs

With ankr_getLogs, the method takes parameter, a filter object that defines the criteria for the log entries to be returned. This filter object can include properties such as the **address of the contract**, the **topics** of the event, and the **block range** in which the log entries were generated.

![carbon_6_8c1badda74.png](https://s3-frontend-strapi.s3.us-west-1.amazonaws.com/carbon_6_8c1badda74_632843d7c2.png)


### Decoding the ankr_getLogs Response: Understanding the Data Returned

The ankr_getLogs method returns an array of log entries that match the filter criteria. Each log entry is represented as an object with properties such as **transactionHash**, **blockNumber**, **logIndex**, **address**, **data**, and **topics**. Understanding these properties and how to interpret the data they contain is crucial for making the most out of the ankr_getLogs method.

![carbon_7_5312b20d26.png](https://s3-frontend-strapi.s3.us-west-1.amazonaws.com/carbon_7_5312b20d26_e074040a2e.png)

The **transactionHash** property contains the transaction's hash that created the log entry. This can be used to look up the transaction and get more information about it. The **blockNumber** contains the block number in which the log entry was included. This can be used to look up the block and get more information about it. The **logIndex** property is the index of the log entry within the block.

The **address** property points to the address of the contract that emitted the event. The **data** property contains the non-indexed data associated with the event. And the **topics** are the indexed data associated with the event, which can include the event name and indexed parameters.

## Query ankr_getLogs

Now that you have all the necessary tools, you can build and implement the **ankr_getLogs** method into your projects. The ability to quickly and easily retrieve log entries greatly enhances your project's capabilities and allows you to make more informed decisions. 

Don't wait any longer; query [ankr_getLogs](https://www.ankr.com/docs/advanced-api/specification/#tag/Query-API/paths/~1?ankr_getLogs/post) today!


large_Medium Post_29.12_3.jpg

medium_Medium Post_29.12_3.jpg

small_Medium Post_29.12_3.jpg

thumbnail_Medium Post_29.12_3.jpg

Medium Post_29.12_3.jpg

Query Log Entries 100x Faster with ankr_getLogs

thumbnail_FvyHHLnWAAQZ3MQ.jpg

FvyHHLnWAAQZ3MQ.jpg

Krinza Momin

## An odyssey of data and frustration of a developer

Ah, the joys of querying Web3. It's like going on a grand adventure, where you're not quite sure what you're looking for or where you're going to find it. You might start out with a simple query, something like "How many transactions were processed on the Ethereum network yesterday?" But before you know it, you're down the rabbit hole of complex data structures, arcane technical jargon, and seemingly endless frustration.

The first challenge you'll face is figuring out how to actually query the data you're looking for. Once you've finally figured out which method to use, you'll need to start dealing with all of the technical details. You'll need to figure out which Ethereum node to connect to, what the correct block number or transaction hash is, and how to format your query in a way that the node will understand. 

And even then, there's no guarantee that you'll get the data you're looking for. The Ethereum network is notoriously unreliable, and you might find yourself getting error messages or incomplete results.

But even if you manage to get your query working, you're not out of the woods yet. Just because you have the data doesn’t mean it’s usable yet. It's like trying to solve a puzzle with only half the pieces.

## The challenges of Web3 data querying

Web3 data querying is a hot topic among developers, with many of them struggling to find the best way to access the vast amounts of data on the decentralized web. This has led to a rise in the use of APIs, which provide a simple and effective way for developers to query data on the blockchain.

One of the biggest challenges faced by developers when it comes to querying is the sheer amount of data that is available. With millions of transactions and blocks being added to the blockchain every day, it can be difficult for developers to know where to start when it comes to accessing this data.

Another challenge is the complexity of the data structures. Unlike traditional databases, which are organized in a simple, hierarchical manner, adding cross-chain functionality can be a complex task, as data does not flow easily between different blockchain networks. This added layer of complexity can make it more challenging to integrate and utilize multiple blockchains in a single system

## The state of API development

In response to these challenges, many developers have turned to APIs, or application programming interfaces, to help them access data on the decentralized web. APIs provide a way for different software systems to communicate with each other and share data and functionality, making it easier for developers to build complex interconnected applications.

There are several different types of APIs available, each designed to serve a specific purpose. Some APIs allow developers to query data directly from the blockchain, while others provide access to third-party data sources, such as exchanges or other decentralized applications.

## The Data Layer for Web3 dapps

Web3 dapps are applications built on top of the blockchain and use smart contracts and other decentralized technologies to provide a wide range of services and functionality.

However, building and running a Web3 dapp is not as simple as building a traditional web application. Unlike traditional web apps, which can easily access data from centralized databases, Web3 dapps must rely on the blockchain for their data needs. 

That's where APIs come in. APIs provide a simple and standardized way for Web3 dapps to access data on the blockchain, allowing developers to query data and interact with smart contracts in a consistent and predictable way. In this sense, APIs can be thought of as the data layer for Web3 dapps, providing a common interface that can be used by any dapp, regardless of its specific requirements or underlying technology. 

## Build with Ankr Advanced APIs

Ankr offers advanced APIs that make it easy for developers to build and ship powerful dapps. These APIs provide a wide range of tools and features, including support for NFTs, tokens, and data querying. This allows developers to build complex and feature-rich dapps, without the toiling of setting up complex RPC calls, that provide value to users and take advantage of the full potential of the web3 data.

### NFT API

One of the most popular Ankr APIs is the NFT API, which allows developers to access and query data related to non-fungible tokens, or NFTs. NFTs are unique digital assets, such as artwork or collectibles, that are built on top of the blockchain. They are often used in Web3 dapps to represent virtual items or assets and can be traded and exchanged on decentralized exchanges.

![Untitled_c5de8a2d9b.png](https://s3-frontend-strapi.s3.us-west-1.amazonaws.com/Untitled_c5de8a2d9b_70945b2085.png)


The NFT API offered by Ankr provides developers with a simple and standardized way to access and query data related to NFTs. With the NFT API, developers can easily retrieve information about specific NFTs, such as their metadata, ownership, and transaction history. They can also use the API to display and manage NFTs within their NFT galleries, wallets and marketplace dapps, providing their users with a seamless and secure way to interact with these unique digital assets.

### Token API

Another important API offered by Ankr is the Token API, which provides developers with access to data related to tokens. Tokens are digital assets that can be traded and exchanged on the blockchain and are often used to represent a variety of different assets, such as cryptocurrencies, utility tokens, and stablecoins. The Token API allows developers to query data related to tokens, such as their token holders, prices, and account balances. 

![73f520e7_10c4_4ec7_b196_b2d778bbfb5b_0473217688.png](https://s3-frontend-strapi.s3.us-west-1.amazonaws.com/73f520e7_10c4_4ec7_b196_b2d778bbfb5b_0473217688_16ac321f42.png)

### Query API

With the Query API, developers can easily retrieve information about transactions, blocks,  and logs, making it easier to build applications that rely on this data. Additionally, Query API offers developers a simple and standardized way to access data from multiple blockchains, without having to worry about the complexities and differences of each individual chain.

![dfa3f0a2_c9c8_482a_a5b3_02b2c106045a_daf7b7f6fe.png](https://s3-frontend-strapi.s3.us-west-1.amazonaws.com/dfa3f0a2_c9c8_482a_a5b3_02b2c106045a_daf7b7f6fe_81f237eb90.png)

## Conclusion

With ANKR's advanced APIs, developers can take advantage of a range of features and capabilities, including no-node maintenance and cross-chain interoperability. These APIs are designed to be easy to use and integrate, making it possible for developers of all skill levels to get started building with blockchain.

From real-time data feeds to advanced analytics and reporting, Ankr's APIs provide a comprehensive suite of tools for building next-generation blockchain-based applications.

Start building now with [Ankr Advanced APIs](https://www.ankr.com/advanced-api/).

large_Medium Post_20.12_2.jpg

medium_Medium Post_20.12_2.jpg

small_Medium Post_20.12_2.jpg

thumbnail_Medium Post_20.12_2.jpg

Medium Post_20.12_2.jpg

Web3 Data Challenges and the State of APIs

large_Base.jpg

medium_Base.jpg

small_Base.jpg

thumbnail_Base.jpg

Base.jpg

Ecosystems

Products

Topics

![Base.jpg](https://s3-frontend-strapi.s3.us-west-1.amazonaws.com/Base_0b381ca82a.jpg)

Ankr is thrilled to announce an essential addition to our RPC service with Base blockchain endpoints. Ankr’s RPC connections to Base will allow developers to build dApps on top of the network that have the ability to quickly and reliably communicate with the network and execute onchain transactions.

Ankr’s RPC API solutions for Base are now listed on the website’s [documentation](https://docs.base.org/tools/node-providers), providing a readily accessible tool for web3 developers to begin building their applications. Ankr’s node infrastructure aims to help scale Base as the network opens its public mainnet on August 9 for global use.

## What is Base?

Base is an Ethereum Layer-2 blockchain that was built to become the onchain home for Coinbase products, users, and assets. It also serves as an open ecosystem allowing Web3 developers to create new dApps on top of the network. Powered by Optimism's OP Stack, Base aims to be one of the most secure, scalable, and interoperable EVM L2s in existence.

**[Learn more about Base.](https://base.org/)**

## A Word From Base & Ankr’s CEO

*“Node providers are essential to support builders deploying their dapps on Base, and we’re excited to work with teams like Ankr that are helping provide a strong foundation and help us deliver on the vision to bring the next billion users onchain.”*

-- Jesse Pollak, Creator of Base and Head of Protocols at Coinbase

*“Ankr is incredibly excited about the potential for a more unified and standardized blockchain ecosystem with Base and Optimism’s OP stack. Interoperable scaling solutions working together with Ethereum as a settlement layer create a user-friendly means of onboarding the next billion citizens of web3. We’re going above and beyond to support the network with high-performance Base node infrastructure and connections.”*

-- Chandler Song, Co-Founder & CEO, Ankr

## What Are Ankr’s New Base RPC Connections?

- Ankr’s Base RPCs (Remote Procedure Calls) connect wallets, command-line interfaces, or dApps with the Base blockchain. They act as a messenger or blockchain router that relays on-chain information between Base nodes, dApps, and ultimately end-users so they can execute necessary tasks like making transactions, populating wallet balances, fetching ownership information, and much more.

- Base RPC endpoints are a gateway for developers to interface directly with the Base network — a portal to communicate easily, remotely, and with no need to go through the DevOps of establishing their own Base nodes.

- Ankr is providing a geo-distributed Base RPC comprised of blockchain nodes running worldwide for incredibly low-latency and reliable connections.

**[Get started now with our Base RPC endpoints!](https://www.ankr.com/rpc/base)**

## How Do the Base RPCs Help Developers?

Building with Base is an excellent choice to create connected and scalable dApps but requires access to the information on Base nodes to do so. Therefore, Ankr’s RPC solves the following developer troubles:

**Eliminates complex node ops** - Ankr’s Base RPCs will completely remove the need for many developers to set up their own Base nodes, removing hours of time spent building, calibrating, and fixing node issues.

**Grants access to advanced tools -**  Ankr’s [Premium RPC Plan](https://www.ankr.com/rpc/pricing/) instantly grants access to the best tools to build applications quickly, including:
- At least 90,000 Base requests/min
- High request priority
- Global node locations
- Telemetry
- Debug mode
- Support Portal
- WebSockets (WS) capabilities

**Powers apps and open-source software that need access to Base** - Connect with a cluster of high-performance nodes that holds the information you need to build and operate dApps with Base blockchain capabilities.

**Supports the Base network**Ankr will strengthen the Base network globally by offering easier development and a broader, distributed node infrastructure.

## Get Started Building On Base For Free

You can get started now by heading to [Ankr’s RPC Service](https://www.ankr.com/rpc/) to make your first call! You can use the endpoint **https://rpc.ankr.com/base** to call the Base chain using the standard EVM JSON RPC methods.

Join the Conversation on Ankr’s Channels

[Twitter](https://twitter.com/ankr) | [Telegram Announcements](https://t.me/anrknetworkann) | [Telegram English Chat](https://t.me/ankrnetwork) | [Help Desk](https://ankrnetwork.atlassian.net/servicedesk/customer/portal/10) | [Discord](http://discord.ankr.com/) | [YouTube](https://www.youtube.com/channel/UCErrNjCg6raOsq5MQ9fpIig) | [LinkedIn](https://www.linkedin.com/company/ankr/) | [Instagram](https://www.instagram.com/ankr) | [Ankr Staking](https://eth2.ankr.com/)

Build On Base With Ankr’s Newest RPC Connection!

Ankr Blog

Explore content by category

medium_1639803510488.jpg

small_1639803510488.jpg

thumbnail_1639803510488.jpg

1639803510488.jpg

Kev Silk

small_Ankr_Blue_Symbol_White_BG@1x.png

thumbnail_Ankr_Blue_Symbol_White_BG@1x.png

Ankr_Blue_Symbol_White_BG@1x.png

Ankr Team 

thumbnail_Fabio.png

Fabio.png

Fabio Wehb Ferrari

small_412.jpg

thumbnail_412.jpg

412.jpg

Erin McMahon

medium_xt.png

small_xt.png

thumbnail_xt.png

xt.png

Kevin is a business writer, journalist, and avid explorer of the blockchain and tech industry. His work has been covered across crypto and traditional media as Ankr’s Senior Writer, with topics spanning the big picture of “Web3,” tech breakthroughs, and how blockchain is changing our digital lives. Working with some of blockchain’s most talented engineers daily, Kevin gains unique insight into what advances we can expect next and the implications they hold for us all.

Technical Writer

Kevin Dwyer

small_tyler sloan.png

thumbnail_tyler sloan.png

tyler sloan.png

Tyler is a Senior Product Manager at Ankr, driving the progress behind Scaling Solutions and Bitcoin Secured Infrastructure. His work is quickly reshaping the deployment of blockchain networks into a process that is fast, streamlined, modular, and asset-rich. Tyler’s substantial experience as a Web3 builder, advisor, and PM ensures clients secure not only the highest tier of infrastructure but also the expert management it takes to create breakout projects.


Senior Project Manager

Tyler Sloan

large_Ankr_Blue Symbol (1).png

medium_Ankr_Blue Symbol (1).png

small_Ankr_Blue Symbol (1).png

thumbnail_Ankr_Blue Symbol (1).png

Ankr_Blue Symbol (1).png

Ankr Staking Team

Ed do eiusmod tempor incididunt ut labore et dolore magna aliqua

Lorem ipsum dolor sit amet, consectetur adipiscing elit

large_Untitled design (9).png

medium_Untitled design (9).png

small_Untitled design (9).png

thumbnail_Untitled design (9).png

Untitled design (9).png

Wasm0 Team

medium_diogo 3.png

small_diogo 3.png

thumbnail_diogo 3.png

diogo 3.png

Diogo Costa

small_Tiago.png

thumbnail_Tiago.png

Tiago.png

Tiago Pratas

small_henrique.png

thumbnail_henrique.png

henrique.png

Henrique Dias

thumbnail_tagus_labs_logo.jpg

tagus_labs_logo.jpg

Tagus Labs

thumbnail_Ethan Nelson.png

Ethan Nelson.png

Ethan Nelson, a DeFi enthusiast and member of the Ankr Staking team, delves into DeFi topics with expertise. His insightful articles simplify complex concepts, empowering readers to navigate the dynamic world of decentralized finance confidently. Stay informed with Ethan's illuminating content on all things liquid staking and DeFi related.

Ethan Nelson

medium_IMAG0116 (1).jpg

small_IMAG0116 (1).jpg

thumbnail_IMAG0116 (1).jpg

IMAG0116 (1).jpg

As a seasoned technical writer, Galya Mikova excels at demystifying intricate blockchain topics. With a talent for simplifying complexity, she bridges the gap between complex technology and reader understanding, making blockchain accessible through her expertly crafted articles.

Galina Mikova

Solutions

Web3 API

Scaling Services

Bitcoin Secured Infrastructure

Staking Solutions

Tools

Block Explorer

Verify

More

Neura
new

Enterprise Solutions

Flow
new

Chiliz

Polygon

SushiSwap

See all cases

Docs

Github

Ankr Whitepaper 2.0

Brand Assets

About Us

Blog

Press

Careers

Docs

Krinza Momin

Author’s articles

Development

Query Log Entries 100x Faster with ankr_getLogs

Development

Web3 Data Challenges and the State of APIs

An odyssey of data and frustration of a developer

Solutions

Web3 API

Scaling Services

Bitcoin Secured Infrastructure

Staking Solutions

Tools

Block Explorer

Verify

More

Neura new

Enterprise Solutions

Flow new

Chiliz

Polygon

SushiSwap

See all cases

Docs

Github

Ankr Whitepaper 2.0

Brand Assets

About Us

Blog

Press

Careers

Krinza Momin

Author’s articles

Development

Query Log Entries 100x Faster with ankr_getLogs

Development

Web3 Data Challenges and the State of APIs

An odyssey of data and frustration of a developer

Neura
new

Flow
new