Build on OP Mainnet – Full 2024 Guide

In at present’s article, we’ll present you how one can construct decentralized purposes (dapps) on OP Mainnet utilizing Moralis’ industry-leading Web3 APIs. With our premier APIs, you may seamlessly fetch and combine on-chain knowledge into your initiatives with solely single API calls. Consequently, when leveraging Moralis, you can begin constructing OP Mainnet initiatives quicker and extra effectively! 

For those who’re desirous to get going with the code, right here’s a bit sneak peek of three endpoints for querying a pockets’s native and NFT balances, together with the value of a token: 

• getNativeBalance() – Fetch the native stability of any pockets:

const response = await Moralis.EvmApi.stability.getNativeBalance({
  "chain": "0xa",
  "address": "0xCBA6a2397b322CF1389f6d1adc05F75F36B20116"
});

• getWalletNFTs() – Get the NFT stability of any pockets:

const response = await Moralis.EvmApi.nft.getWalletNFTs({
  "chain": "0xa",
  "address": "0xCBA6a2397b322CF1389f6d1adc05F75F36B20116"
});

• getTokenPrice() – Question the value of any fungible token:

const response = await Moralis.EvmApi.token.getTokenPrice({
  "chain": "0xa",
  "address": "0x4200000000000000000000000000000000000042"
});

To discover different endpoints and our APIs in additional element, try our official Moralis documentation web page or be a part of us on this article as we present you how one can construct on OP Mainnet with out breaking a sweat! Now, if you wish to comply with alongside all through this tutorial, don’t neglect to enroll with Moralis. You possibly can create an account in a heartbeat, and also you’ll get prompt entry to our premier Web3 API suite! 

Overview 

We’ll kickstart at present’s article by exploring the ins and outs of OP Mainnet. In doing so, we’ll clarify what the community is, the way it works, and canopy some advantages of constructing dapps on OP Mainnet. From there, we’ll introduce you to Moralis and our industry-leading Optimism API suite. Upon getting an summary of Moralis, we’ll soar straight into the primary tutorial and present you how one can construct on OP Mainnet in three steps: 

• Step 1: Create a Moralis Account and Get Your API Key
• Step 2: Select OP Mainnet API Endpoints
• Step 3: Write a Script and Run the Code

To prime issues off, we’ll cowl a short record of OP Mainnet initiatives to offer you some inspiration to your subsequent dapp! 

If this sounds thrilling, be a part of us within the following part as we begin by discovering what OP Mainnet is!

What’s OP Mainnet? 

OP Mainnet – often known as Optimism – launched in 2021, and it’s a low-cost and lightning-fast ETH layer-2 (L2) scaling answer. This blockchain community serves as a basis for an enormous ecosystem that encompasses a big selection of decentralized purposes (dapps). This consists of cryptocurrency wallets, decentralized exchanges (DEXs), and different distinguished Web3 initiatives!

So, why must you construct dapps on OP Mainnet? To reply this query, let’s have a look at three advantages of this community: 

• Velocity and Effectivity: OP Mainnet leverages “optimistic rollup” know-how to bundle lots of of off-chain operations right into a single Ethereum transaction. In doing so, the community can considerably enhance Ethereum’s scalability by facilitating faster transactions at a low price. This makes OP Mainnet a extra environment friendly and cost-effective answer for finish customers and builders alike.

• Modern Infrastructure: By means of OP Mainnet’s Superchain mission, the community seeks to maximise interoperability and composability between blockchains utilizing the OP Stack. In doing so, OP Mainnet goals to combine a number of siloed L2 scaling options right into a single, unified layer. 

• Scalable Ecosystem: With EVM-equivalence, all Ethereum dapps will work completely on OP Mainnet. This implies you should utilize the identical established improvement instruments to construct on OP Mainnet as you’d on Ethereum. 

That offers you an summary of OP Mainnet and the advantages of this community. Within the subsequent part, we’ll introduce you to the simplest approach to construct OP Mainnet dapps: Moralis! 

Best Solution to Build on OP Mainnet – Introducing Moralis 

Moralis is an industry-leading Web3 API supplier, and its toolset of totally OP Mainnet-compatible APIs at present powers blockchain and crypto purposes for tens of millions of customers worldwide!

In Moralis’ suite of Web3 APIs, you’ll discover greater than ten interfaces for numerous use circumstances, together with the Pockets API, NFT API, and Token API. With these premier APIs, it’s attainable to question blockchain knowledge with solely single strains of code. As such, you may seamlessly construct OP Mainnet dapps each quicker and extra effectively utilizing Moralis.

Nevertheless, what makes Moralis stand out in comparison with the competitors? To reply this query, let’s discover three advantages of our premier Web3 APIs:

• Complete: All our API responses are enriched with metadata, transaction decodings, market knowledge, deal with labels, and rather more from a number of sources. This permits us to offer the {industry}’s most complete APIs which might be designed with the end result in thoughts, minimizing the variety of calls it is advisable to construct Web3 initiatives.

• Easy: Moralis is the one Web3 API supplier that’s easy and intuitive to make use of. All of our requests and responses adhere to the identical customary and construction throughout numerous APIs tailor-made for particular use circumstances.

• Trusted: Our Web3 APIs are trusted by lots of of 1000’s of builders and enterprise clients like MetaMask, Polygon, Delta, and so forth. So, if you wish to emulate a number of the Web3 {industry}’s largest names, think about using Moralis.

For those who’d wish to discover all our interfaces, try the official Web3 API web page! 

Additionally, do you know which you could entry our Web3 APIs free of charge? Merely enroll with Moralis, and also you’ll have the ability to construct OP Mainnet dapps with out breaking a sweat! 

3-Step Tutorial: The right way to Build on OP Mainnet 

Now, with an summary of Moralis, let’s dive into the primary part of this information and present you how one can construct on OP Mainnet in three simple steps: 

• Step 1: Create a Moralis Account and Get Your API Key
• Step 2: Select OP Mainnet API Endpoints
• Step 3: Write a Script and Run the Code

Nevertheless, earlier than you will get going, it is advisable to take care of a few conditions! 

Conditions 

Moralis’ Web3 APIs are suitable with a number of programming languages, together with Python, Go, and so forth. Nevertheless, on this tutorial, we’ll be utilizing JavaScript and NodeJS. As such, earlier than you proceed, be sure to have the next prepared: 

Step 1: Create a Moralis Account and Get Your API Key 

The very first thing you’ll want is a Moralis account. As such, in the event you haven’t already, click on on the ”Begin for Free” button on the prime proper of Moralis’ homepage and arrange an account: 

After creating an account and logging in, you’ll discover that Moralis has routinely arrange a brand new mission for you: 

The very first thing you might need to do is rename the mission underneath ”Settings”: 

Subsequent, scroll right down to the ”API Keys” part and duplicate your Moralis API key: 

Please maintain it for now, as you’ll want it within the third step! 

Step 2: Select OP Mainnet API Endpoints 

On this part, we’ll dive a bit deeper into the varied APIs of Moralis to offer you an summary of what OP Mainnet initiatives you may construct with our premier instruments. Extra particularly, we’ll focus on the next three APIs and their respective endpoints: 

• Pockets API 
• NFT API
• Token API

So, let’s kick this off by exploring the ins and outs of Moralis’ Pockets API! 

Pockets API 

Moralis’ Pockets API is the last word software for constructing cryptocurrency wallets and integrating pockets performance into OP Mainnet initiatives. The Pockets API helps 500+ million addresses throughout the largest blockchains, together with Ethereum, Polygon, BSC, and, in fact, OP Mainnet! 

With this industry-leading software, you may effortlessly question the native stability, NFT stability, profile knowledge, token transfers, transactions, and extra of any cryptocurrency deal with. As such, with the Pockets API, you may construct all the pieces from portfolio trackers to cryptocurrency wallets on OP Mainnet with out breaking a sweat. 

To focus on the accessibility of this software, listed here are three distinguished endpoints you’ll probably discover useful when constructing dapps: 

• getNativeBalance() – Question the native stability of any pockets deal with: 

const response = await Moralis.EvmApi.stability.getNativeBalance({
  "chain": "0xa",
  "address": "0xCBA6a2397b322CF1389f6d1adc05F75F36B20116"
});

getNativeBalance() response: 

{
  "balance": "50640324378835108031"
}

• getWalletTransactions() – Fetch the native transaction historical past of any pockets:

const response = await Moralis.EvmApi.transaction.getWalletTransactions({
  "chain": "0xa",
  "address": "0x2a82ae142b2e62cb7d10b55e323acb1cab663a26"
});

getWalletTransactions() response: 

[
    //...
    {
      "hash": "0x6cbb692563bfb4adfa0850a4d68cbed848ba9be2b73fe04f42a49b81305e3eab",
      "nonce": "13",
      "transaction_index": "5",
      "from_address": "0xcd3031fb7da6c6764466a6f77ec74e52a4cea810",
      "from_address_label": null,
      "to_address": "0x2a82ae142b2e62cb7d10b55e323acb1cab663a26",
      "to_address_label": null,
      "value": "27200000",
      "gas": "21000",
      "gas_price": "50000000",
      "input": "0x",
      "receipt_cumulative_gas_used": "363490",
      "receipt_gas_used": "21000",
      "receipt_contract_address": null,
      "receipt_root": null,
      "receipt_status": "0",
      "block_timestamp": "2023-11-18T09:10:23.000Z",
      "block_number": "112349923",
      "block_hash": "0xd92193788b4f8ed5c991819ecf22433a4a5eca8b45974c90115c852635dcc4d3",
      "transfer_index": [
        112349923,
        5
      ]
    },
    //...
]

• getWalletTokenBalances() – Get the token balances of any pockets: 

const response = await Moralis.EvmApi.token.getWalletTokenBalances({
  "chain": "0xa",
  "address": "0x2a82ae142b2e62cb7d10b55e323acb1cab663a26"
});

getWalletTokenBalances() response:

[
  {
    "token_address": "0x7f5c764cbc14f9669b88837ca1490cca17c31607",
    "symbol": "USDC",
    "name": "USD Coin",
    "logo": null,
    "thumbnail": null,
    "decimals": 6,
    "balance": "2000000",
    "possible_spam": false,
    "verified_contract": true
  },
  {
    "token_address": "0x4200000000000000000000000000000000000042",
    "symbol": "OP",
    "name": "Optimism",
    "logo": null,
    "thumbnail": null,
    "decimals": 18,
    "balance": "1294044371320286807123702580",
    "possible_spam": false,
    "verified_contract": true
  },
  //...
]

NFT API 

The NFT API helps over three million collections throughout ten+ EVM-compatible chains, together with all the pieces from well-established initiatives to tokens that dropped simply seconds in the past. Consequently, this software takes care of all of your NFT data-related improvement wants! 

With the NFT API, you solely want single API calls to seamlessly fetch real-time NFT transfers, on-chain worth knowledge, enriched metadata, and extra. So, when working with this premier software, you may construct all the pieces from NFT marketplaces to Web3 video games with ease. 

Listed here are three distinguished endpoints to focus on the accessibility of our NFT API: 

• getNFTMetadata() – Get the metadata of any NFT: 

const response = await Moralis.EvmApi.nft.getNFTMetadata({
  "chain": "0xa",
  "address": "0xB8Df6Cc3050cC02F967Db1eE48330bA23276A492",
  "tokenId": "1"
});

getNFTMetadata() response:

{
  "amount": "1",
  "token_id": "1",
  "token_address": "0xb8df6cc3050cc02f967db1ee48330ba23276a492",
  "contract_type": "ERC721",
  "owner_of": "0xb09fa44ef3bcbd1bf2d35d5644a19e188d4c05f6",
  "last_metadata_sync": "2024-02-01T15:09:43.956Z",
  "last_token_uri_sync": "2024-02-01T15:09:42.794Z",
  "metadata": "{"name":"Optipunk #1","description":"10,000 distinctive collectible characters with proof of possession saved on Optimism","attributes":[{"trait_type":"Type","value":"Male"},{"trait_type":"Accessory","value":"Smile"},{"trait_type":"Accessory","value":"Mohawk"}],"picture":"ipfs://QmbAhtqQqiSQqwCwQgrRB6urGc3umTskiuVpgX7FvHhutU/1.png"}",
  "block_number": "97749",
  "block_number_minted": "97749",
  "name": "OptiPunk",
  "symbol": "OPPUNK",
  "token_hash": "364af8044f93145cf5859151b46223a3",
  "token_uri": "
  "minter_address": "0xb09fa44ef3bcbd1bf2d35d5644a19e188d4c05f6",
  "verified_collection": false,
  "possible_spam": false
}

• getWalletNFTs() – Fetch the NFT stability of a pockets:

const response = await Moralis.EvmApi.nft.getWalletNFTs({
  "chain": "0xa",
  "address": "0xCBA6a2397b322CF1389f6d1adc05F75F36B20116"
});

getWalletNFTs() response:

[
    {
      "amount": "1",
      "token_id": "3569948",
      "token_address": "0xd12999440402d30f69e282d45081999412013844",
      "contract_type": "ERC721",
      "owner_of": "0xcba6a2397b322cf1389f6d1adc05f75f36b20116",
      "last_metadata_sync": "2024-02-01T15:03:42.174Z",
      "last_token_uri_sync": "2024-02-01T15:03:42.039Z",
      "metadata": "//...",
      "block_number": "107697133",
      "block_number_minted": "107306857",
      "name": "Omnichain Adventures",
      "symbol": "OMNIA",
      "token_hash": "f50ea59436c7eda79995a4e694d53f72",
      "token_uri": "
      "minter_address": "0x8caf185283211beab492601825fee0b44f8633aa",
      "verified_collection": false,
      "possible_spam": false
    }
]

• getNFTOwners() – Question an array of all NFT house owners for a given contract:

const response = await Moralis.EvmApi.nft.getNFTOwners({
  "chain": "0xa",
  "address": "0xB8Df6Cc3050cC02F967Db1eE48330bA23276A492"
});

getNFTOwners() response: 

[
   {
      "amount": "1",
      "token_id": "2329",
      "token_address": "0xb8df6cc3050cc02f967db1ee48330ba23276a492",
      "contract_type": "ERC721",
      "owner_of": "0x0331969e189d63fbc31d771bb04ab44227d748d8",
      "last_metadata_sync": "2024-02-01T15:10:32.987Z",
      "last_token_uri_sync": "2024-02-01T15:10:31.531Z",
      "metadata": "//...",
      "block_number": "135838",
      "block_number_minted": "135838",
      "name": "OptiPunk",
      "symbol": "OPPUNK",
      "token_hash": "6206b15eef897e716a8f943c61718039",
      "token_uri": "
      "minter_address": "0x0331969e189d63fbc31d771bb04ab44227d748d8",
      "verified_collection": false,
      "possible_spam": false
    },
    //...
]

Token API 

The Token API is the {industry}’s most complete software for fungible token knowledge, supporting each single token throughout greater than ten blockchains, together with OP Mainnet, Ethereum, Polygon, and BNB Sensible Chain! 

With the Token API, you may seamlessly fetch costs, transfers, balances, metadata, and rather more for any ERC-20 token. As such, when utilizing this premier API, you may construct all the pieces from DEXs to token explorers very quickly. 

To focus on the accessibility of the Token API, listed here are three endpoints you’ll discover useful when constructing OP Mainnet dapps: 

• getTokenPrice() – Get the value of any fungible token: 

const response = await Moralis.EvmApi.token.getTokenPrice({
  "chain": "0xa",
  "address": "0x4200000000000000000000000000000000000042"
});

getTokenPrice() response: 

{
  "tokenName": "Optimism",
  "tokenSymbol": "OP",
  "tokenLogo": null,
  "tokenDecimals": "18",
  "nativePrice": {
    "value": "1346688388542655",
    "decimals": 18,
    "name": "Ether",
    "symbol": "ETH",
    "address": "0x4200000000000000000000000000000000000006"
  },
  "usdPrice": 3.357083520606333,
  "usdPriceFormatted": "3.357083520606332971",
  "exchangeName": "Uniswap v3",
  "exchangeAddress": "0x1F98431c8aD98523631AE4a59f267346ea31F984",
  "tokenAddress": "0x4200000000000000000000000000000000000042",
  "priceLastChangedAtBlock": "115945253",
  "verifiedContract": true
}

• getTokenMetadata() – Fetch the metadata of any token:

const response = await Moralis.EvmApi.token.getTokenMetadata({
  "chain": "0xa",
  "addresses": [
    "0x4200000000000000000000000000000000000042"
  ]
});

getTokenMetadata() response:

 [
  {
    "address": "0x4200000000000000000000000000000000000042",
    "address_label": null,
    "name": "Optimism",
    "symbol": "OP",
    "decimals": "18",
    "logo": null,
    "logo_hash": null,
    "thumbnail": null,
    "block_number": "0",
    "validated": 1,
    "created_at": null,
    "possible_spam": false,
    "verified_contract": true
  }
]

• getTokenTransfers() – Question all transactions for a given token contract: 

const response = await Moralis.EvmApi.token.getTokenTransfers({
  "chain": "0xa",
  "address": "0x4200000000000000000000000000000000000042"
});

getTokenTransfers() response:

[
   {
      "token_name": "Optimism",
      "token_symbol": "OP",
      "token_logo": null,
      "token_decimals": "18",
      "from_address": "0x666936a007c8c2e70dd5aae9151fd50de858fb16",
      "from_address_label": null,
      "to_address": "0x2580fe0cdd3a2300f4fe9637e7d4b44d47f1f63b",
      "to_address_label": null,
      "address": "0x4200000000000000000000000000000000000042",
      "block_hash": "0x4f99ed7e331b422c87d73eed2a60e98417d072ed64d0ceab57e7479d76aeb58b",
      "block_number": "115945333",
      "block_timestamp": "2024-02-09T14:37:23.000Z",
      "transaction_hash": "0xf8e82cbe28afb6e3adea9ef0c34132588ff29a8cc16b0cc48cf516efc0a68d05",
      "transaction_index": 10,
      "log_index": 48,
      "value": "600000000000000000000",
      "possible_spam": false,
      "value_decimal": "600",
      "verified_contract": true
    },
]

Step 3: Write a Script and Run the Code

When you select the suitable endpoints to your explicit mission, all that continues to be is so that you can name them. And we’ll present you precisely how to take action on this closing step of our tutorial! 

On this case, we’ll use the getWalletTokenBalances() endpoint for example. Nevertheless, in the event you’re interested by another endpoint, fear not, as you may comply with just about the identical steps for all endpoints. 

Begin by establishing a folder in your IDE and run the terminal command beneath to initialize a brand new mission:

npm init

Subsequent, run the instructions beneath within the terminal to put in the Moralis SDK:

npm set up moralis @moralisweb3/common-evm-utils

From right here, open your ”package deal.json” file and add ”sort”: ”module”: 

You possibly can then create a brand new ”index.js” file and add the next code: 

import Moralis from 'moralis';

attempt {
  await Moralis.begin({
    apiKey: "YOUR_API_KEY"
  });

  const response = await Moralis.EvmApi.token.getWalletTokenBalances({
    "chain": "0xa",
    "address": "0x2a82ae142b2e62cb7d10b55e323acb1cab663a26"
  });

  console.log(response.uncooked);
} catch (e) {
  console.error(e);
}

You now must make just a few small configurations to the code. To start with, it is advisable to substitute YOUR_API_KEY with the important thing you copied throughout step one. Subsequent, you additionally must configure the deal with parameter to suit your question: 

From right here, you solely must run the code. To take action, open a brand new terminal and execute the command beneath within the mission’s root folder:

node index.js

In return, you’ll get a response containing an array of the token balances of the required deal with. It’ll look one thing like this: 

[
  {
    "token_address": "0x7f5c764cbc14f9669b88837ca1490cca17c31607",
    "symbol": "USDC",
    "name": "USD Coin",
    "logo": null,
    "thumbnail": null,
    "decimals": 6,
    "balance": "2000000",
    "possible_spam": false,
    "verified_contract": true
  },
  {
    "token_address": "0x4200000000000000000000000000000000000042",
    "symbol": "OP",
    "name": "Optimism",
    "logo": null,
    "thumbnail": null,
    "decimals": 18,
    "balance": "1294044371320286807123702580",
    "possible_spam": false,
    "verified_contract": true
  },
  //...
]

That’s it! You now know how one can question all the pieces from pockets balances to token transactions utilizing Moralis’ premier Web3 API suite. In flip, you’re now able to take your improvement endeavors to the following degree and begin constructing OP Mainnet dapps!

Dapp Concepts – Exploring a Record of Optimism Initiatives

With a greater understanding of how one can construct dapps on OP Mainnet utilizing Moralis’ Web3 APIs, you would possibly now be on the lookout for some inspiration to your subsequent mission. Consequently, we’ll take this part to discover 5 distinguished OP Mainnet initiatives: 

If you wish to discover initiatives not coated above, please try our complete record of prime Optimism dapps on Moralis’ Web3 Wiki!

Abstract: The right way to Build on OP Mainnet

In at present’s article, we confirmed you how one can construct on OP Mainnet with Moralis in three easy steps: 

• Step 1: Create a Moralis Account and Get Your API Key
• Step 2: Select OP Mainnet API Endpoints
• Step 3: Write a Script and Run the Code

If in case you have adopted alongside this far, you now know how one can construct dapps on Optimism seamlessly! Additionally, in the event you haven’t already, don’t neglect to enroll with Moralis. You possibly can enroll with the press of some buttons, and also you’ll achieve prompt entry to our industry-leading OP Mainnet API suite so you can begin constructing dapps quicker and extra effectively!