getChainId

Gets the chain ID if its set, otherwise gets the chain ID from the access node

Import

You can import the entire package and access the function:

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import * as fcl from "@onflow/fcl"

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fcl.getChainId(opts)

Or import directly the specific function:

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import { getChainId } from "@onflow/fcl"

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getChainId(opts)

Usage

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// Get chain ID using configured access node

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import * as fcl from "@onflow/fcl"

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const chainId = await fcl.getChainId()

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console.log("Connected to:", chainId) // "testnet" or "mainnet"

Parameters

opts (optional)

• Type:

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export interface GetChainIdOptions {

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node?: unknown

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enableRequestLogging?: boolean

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[key: string]: any

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}

• Description: Optional configuration parameters

Properties:

• node - Override the access node URL for this request instead of using the configured one
• enableRequestLogging - Enable logging for the chain ID request

Returns

Promise<string>

Promise that resolves to the chain ID string (e.g., "mainnet", "testnet", "local")

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