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Merge branch '4.x' into 6640-mainnet-release-tests-estimategas-error
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‎CHANGELOG.md‎

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#### web3-utils
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- Fix unecessary array copy when pack encoding (#6553)
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- Fix unnecessary array copy when pack encoding (#6553)
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## [Unreleased]
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#### web3-utils
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- Fix unecessary array copy when pack encoding (#6553)
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- Fix unnecessary array copy when pack encoding (#6553)

‎docs/docs/guides/advanced/_category_.yml‎

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label: 'Advanced'
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label: '🧠 Advanced'
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collapsible: true
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collapsed: true
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link: null
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position: 5
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position: 11

‎docs/docs/guides/advanced/support_additional_rpc_methods/index.md‎ renamed to ‎docs/docs/guides/advanced/custom_RPC.md‎

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---
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sidebar_position: 0
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sidebar_position: 1
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sidebar_label: Add custom RPC methods
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---
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# Add custom RPC methods
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#### Introduction
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## Introduction
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Web3.js is a popular library for interacting with the Ethereum blockchain. It provides a set of APIs to interact with Ethereum nodes via JSON-RPC calls. For adding new JSON-RPC function calls to the library, you can do so using the plugin feature in web3.js 4.x. This allows you to extend the functionality of Web3.js and add support for new JSON-RPC methods.
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Following tutorial will guide you through the process of creating a custom plugin to extend the functionality of web3.js 4.x and add support for new RPC methods.
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#### Creating new RPC methods Plugin in 4 Steps
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## Creating new RPC methods Plugin in 4 Steps
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### Step 1: Setting Up Web3.js as a Peer Dependency and Creating a TypeScript Class
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1. First add web3.js as peer dependency in project´s `package.json` and create a TypeScript class for your plugin. This class should extend the `Web3Plugin` class provided by web3.js.
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:::info
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This will give your plugin access to [requestManager](/api/web3-core/class/Web3Context#requestManager) and [accountProvider](/api/web3-core/class/Web3Context#accountProvider).
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:::caution
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:::
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<Tabs groupId="prog-lang" queryString>
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<Tabs groupId='prog-lang' queryString>
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<TabItem value="javascript" label="JavaScript"
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attributes={{className: "javascript-tab"}}>
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<TabItem value='javascript' label='JavaScript'
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attributes={{className: 'javascript-tab'}}>
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```javascript
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const { Web3PluginBase } = require('web3');
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//highlight-start
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class CustomRpcMethodsPlugin extends Web3PluginBase {
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// step 1
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// ...
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// step 1
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// ...
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}
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//highlight-end
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module.exports = CustomRpcMethodsPlugin;
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```
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</TabItem>
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<TabItem value="typescript" label="TypeScript" default
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attributes={{className: "typescript-tab"}}>
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<TabItem value='typescript' label='TypeScript' default
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attributes={{className: 'typescript-tab'}}>
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```typescript
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import { Web3PluginBase } from 'web3';
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//highlight-start
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export default class CustomRpcMethodsPlugin extends Web3PluginBase {
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// step 1
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// ...
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// step 1
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// ...
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}
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//highlight-end
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```
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</TabItem>
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</Tabs>
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### Step 2: Adding a Public `pluginNamespace` Property to the Plugin Class
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2. After that add public `pluginNamespace` property. This will be used to access your plugin, as mentioned in step number 5 code example.
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<Tabs groupId="prog-lang" queryString>
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<Tabs groupId='prog-lang' queryString>
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<TabItem value="javascript" label="JavaScript"
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attributes={{className: "javascript-tab"}}>
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<TabItem value='javascript' label='JavaScript'
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attributes={{className: 'javascript-tab'}}>
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```javascript
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const { Web3PluginBase } = require('web3');
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class CustomRpcMethodsPlugin extends Web3PluginBase {
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pluginNamespace = 'customRpcMethods'; // step 2
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//highlight-start
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pluginNamespace = 'customRpcMethods'; // step 2
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//highlight-end
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}
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module.exports = CustomRpcMethodsPlugin;
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```
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</TabItem>
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<TabItem value="typescript" label="TypeScript" default
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attributes={{className: "typescript-tab"}}>
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<TabItem value='typescript' label='TypeScript' default
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attributes={{className: 'typescript-tab'}}>
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```typescript
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import { Web3PluginBase } from 'web3';
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export default class CustomRpcMethodsPlugin extends Web3PluginBase {
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public pluginNamespace = 'customRpcMethods'; // step 2
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//highlight-start
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public pluginNamespace = 'customRpcMethods'; // step 2
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//highlight-end
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}
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```
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</TabItem>
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</Tabs>
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### Step 3: Creating Custom RPC Methods in the Plugin Class
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3. Once plugin class is created using above mentioned steps, its very easy to add new RPC methods like:
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<Tabs groupId='prog-lang' queryString>
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<TabItem value="javascript" label="JavaScript"
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attributes={{className: "javascript-tab"}}>
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<TabItem value='javascript' label='JavaScript'
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attributes={{className: 'javascript-tab'}}>
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```javascript
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const { Web3PluginBase } = require('web3');
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class CustomRpcMethodsPlugin extends Web3PluginBase {
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pluginNamespace = 'customRpcMethods';
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async customRpcMethod() {
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// step 3
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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pluginNamespace = 'customRpcMethods';
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//highlight-start
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async customRpcMethod() {
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// step 3
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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//highlight-end
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}
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module.exports = CustomRpcMethodsPlugin;
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```
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</TabItem>
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<TabItem value="typescript" label="TypeScript" default
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attributes={{className: "typescript-tab"}}>
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<TabItem value='typescript' label='TypeScript' default
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attributes={{className: 'typescript-tab'}}>
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```typescript
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import { Web3PluginBase } from 'web3';
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export default class CustomRpcMethodsPlugin extends Web3PluginBase {
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public pluginNamespace = 'customRpcMethods';
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public async customRpcMethod() {
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// step 3
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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public pluginNamespace = 'customRpcMethods';
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//highlight-start
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public async customRpcMethod() {
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// step 3
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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//highlight-end
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}
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</TabItem>
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4. Final step is setting up module [augmentation](https://www.typescriptlang.org/docs/handbook/declaration-merging.html#module-augmentation), this will allow you to access plugin on web3 object.
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### Step 4: Enabling Access to the Plugin on the Web3 Object
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4. (For TypeScript) Final step is setting up module [augmentation](https://www.typescriptlang.org/docs/handbook/declaration-merging.html#module-augmentation), this will allow you to access plugin on web3 object.
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<Tabs groupId='prog-lang' queryString>
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<TabItem value="javascript" label="JavaScript"
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attributes={{className: "javascript-tab"}}>
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<TabItem value='javascript' label='JavaScript'
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attributes={{className: 'javascript-tab'}}>
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```javascript
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const { Web3PluginBase } = require('web3');
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class CustomRpcMethodsPlugin extends Web3PluginBase {
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pluginNamespace = 'customRpcMethods';
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async customRpcMethod() {
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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pluginNamespace = 'customRpcMethods';
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async customRpcMethod() {
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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module.exports = CustomRpcMethodsPlugin;
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```
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<TabItem value='typescript' label='TypeScript' default
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attributes={{className: 'typescript-tab'}}>
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```typescript
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export default class CustomRpcMethodsPlugin extends Web3PluginBase {
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public pluginNamespace = 'customRpcMethods';
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public async customRpcMethod() {
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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public pluginNamespace = 'customRpcMethods';
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public async customRpcMethod() {
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return this.requestManager.send({
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// plugin has access to web3.js internal features like request manager
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method: 'custom_rpc_method',
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params: [],
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});
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}
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}
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//highlight-start
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// Module Augmentation
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declare module 'web3' {
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// step 4
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// step 4
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interface Web3Context {
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customRpcMethods: CustomRpcMethodsPlugin;
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}
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interface Web3Context {
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customRpcMethods: CustomRpcMethodsPlugin;
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}
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}
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//highlight-end
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```
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After the plugin is ready, it is recommended to publish it on the NPM registry.
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#### Using Web3 Custom PRC Plugin (with web3 instance)
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### Step 5: Using the Web3 `CustomRPCPlugin` with a Web3 Instance
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5. First add plugin in your plugin consumer project's `package.json`, create web3 and plugin instances, and after that use `.registerPlugin` method with some web3.js module (in following example its registered with main web3).
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Once plugin is registered its custom methods will be available to use.
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<Tabs groupId='prog-lang' queryString>
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attributes={{className: "javascript-tab"}}>
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<TabItem value='javascript' label='JavaScript'
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attributes={{className: 'javascript-tab'}}>
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```javascript
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const CustomRpcMethodsPlugin = require('web3-plugin-example');
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const web3 = new Web3('http://127.0.0.1:8545');
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//highlight-start
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web3.registerPlugin(new CustomRpcMethodsPlugin()); // step 5
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web3.customRpcMethods.customRpcMethod();
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// ...
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web3.customRpcMethods.customRpcMethod(); //usage
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//highlight-end
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```
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</TabItem>
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<TabItem value="typescript" label="TypeScript" default
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attributes={{className: "typescript-tab"}}>
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<TabItem value='typescript' label='TypeScript' default
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attributes={{className: 'typescript-tab'}}>
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```typescript
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import CustomRpcMethodsPlugin from 'web3-plugin-example';
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const web3 = new Web3('http://127.0.0.1:8545');
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//highlight-start
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web3.registerPlugin(new CustomRpcMethodsPlugin()); // step 5
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web3.customRpcMethods.customRpcMethod();
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web3.customRpcMethods.customRpcMethod(); //usage
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//highlight-end
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```
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</TabItem>
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#### More Details of Plugin Feature
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## More Details of Plugin Feature
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For more details follow :
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