197 lines
5.4 KiB
Markdown
197 lines
5.4 KiB
Markdown
-----
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Documentation: [html](https://docs-beta.ethers.io/)
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-----
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API Providers
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=============
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EtherscanProvider
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-----------------
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#### **new ***ethers* . *providers* . **EtherscanProvider**( [ network = "homestead" , [ apiKey ] ] )
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Create a new **EtherscanProvider** connected to *network* with the optional *apiKey*.
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The *network* may be specified as **string** for a common network name, a **number** for a common chain ID or a [Network Object]provider-(network).
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If no *apiKey* is provided, a shared API key will be used, which may result in reduced performance and throttled requests. It is highly recommended for production, you register with [Etherscan](https://etherscan.io) for your own API key.
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#### Note: Default API keys
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If no *apiKey* is provided, a shared API key will be used, which may result in reduced performance and throttled requests.
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It is highly recommended for production, you register with [Etherscan](https://etherscan.io) for your own API key.
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#### **Supported Networks**
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- Homestead (Mainnet)
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- Ropsten (proof-of-work testnet)
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- Rinkeby (proof-of-authority testnet)
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- Gorli (clique testnet)
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- Kovan (proof-of-authority testnet)
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```javascript
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// <hide>
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const EtherscanProvider = ethers.providers.EtherscanProvider;
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const apiKey = "...";
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// </hide>
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// Connect to mainnet (homestead)
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provider = new EtherscanProvider();
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// Connect to rinkeby testnet (these are equivalent)
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provider = new EtherscanProvider("rinkeby");
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provider = new EtherscanProvider(4);
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const network = ethers.providers.getNetwork("rinkeby");
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// <hide>
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delete network._defaultProvider;
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network
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// </hide>
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//!
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provider = new EtherscanProvider(network);
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// Connect to mainnet (homestead) with an API key
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provider = new EtherscanProvider(null, apiKey);
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provider = new EtherscanProvider("homestead", apiKey);
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```
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#### *provider* . **getHistory**( address ) => *Array< History >*
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@TODO... Explain
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InfuraProvider
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--------------
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#### **new ***ethers* . *providers* . **InfuraProvider**( [ network = "homestead" , [ apiKey ] ] )
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Create a new **InfuraProvider** connected to *network* with the optional *apiKey*.
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The *network* may be specified as **string** for a common network name, a **number** for a common chain ID or a [Network Object]provider-(network).
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The *apiKey* can be a **string** Project ID or an **object** with the properties `projectId` and `projectSecret` to specify a [Project Secret](https://infura.io/docs/gettingStarted/authentication) which can be used on non-public sources (like on a server) to further secure your API access and quotas.
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#### Note: Default API keys
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If no *apiKey* is provided, a shared API key will be used, which may result in reduced performance and throttled requests.
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It is highly recommended for production, you register with [INFURA](https://infura.io) for your own API key.
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#### **Supported Networks**
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- Homestead (Mainnet)
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- Ropsten (proof-of-work testnet)
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- Rinkeby (proof-of-authority testnet)
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- Gorli (clique testnet)
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- Kovan (proof-of-authority testnet)
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```javascript
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// <hide>
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const InfuraProvider = ethers.providers.InfuraProvider;
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const projectId = "...";
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const projectSecret = "...";
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// </hide>
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// Connect to mainnet (homestead)
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provider = new InfuraProvider();
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// Connect to the ropsten testnet
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// (see EtherscanProvider above for other network examples)
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provider = new InfuraProvider("ropsten");
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// Connect to mainnet with a Project ID (these are equivalent)
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provider = new InfuraProvider(null, projectId);
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provider = new InfuraProvider("homestead", projectId);
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// Connect to mainnet with a Project ID and Project Secret
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provider = new InfuraProvider("homestead", {
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projectId: projectId,
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projectSecret: projectSecret
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});
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```
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AlchemyProvider
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---------------
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#### **new ***ethers* . *providers* . **AlchemyProvider**( [ network = "homestead" , [ apiKey ] ] )
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Create a new **AlchemyProvider** connected to *network* with the optional *apiKey*.
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The *network* may be specified as **string** for a common network name, a **number** for a common chain ID or a [Network Object](/v5/api/providers/types/#providers-Network).
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#### Note: Default API keys
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If no *apiKey* is provided, a shared API key will be used, which may result in reduced performance and throttled requests.
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It is highly recommended for production, you register with [Alchemy](https://alchemyapi.io) for your own API key.
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#### **Supported Networks**
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- Homestead (Mainnet)
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- Ropsten (proof-of-work testnet)
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- Rinkeby (proof-of-authority testnet)
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- Gorli (clique testnet)
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- Kovan (proof-of-authority testnet)
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```javascript
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// <hide>
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const AlchemyProvider = ethers.providers.AlchemyProvider;
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const apiKey = "...";
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// </hide>
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// Connect to mainnet (homestead)
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provider = new AlchemyProvider();
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// Connect to the ropsten testnet
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// (see EtherscanProvider above for other network examples)
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provider = new AlchemyProvider("ropsten");
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// Connect to mainnet with an API key (these are equivalent)
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provider = new AlchemyProvider(null, apiKey);
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provider = new AlchemyProvider("homestead", apiKey);
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```
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CloudflareProvider
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------------------
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#### **new ***ethers* . *providers* . **CloudflareProvider**( )
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Create a new **CloudflareProvider** connected to mainnet (i.e. "homestead").
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#### **Supported Networks**
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- Homestead (Mainnet)
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```javascript
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// <hide>
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const CloudflareProvider = ethers.providers.CloudflareProvider;
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// </hide>
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// Connect to mainnet (homestead)
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provider = new CloudflareProvider();
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```
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