build

A builder function that creates an interaction from an array of builder functions.

The build function takes an array of builder functions and applies them to create a complete interaction object. This is the foundation for constructing all interactions in Flow, whether they're scripts, transactions, or queries.

Each builder function modifies specific parts of the interaction object, such as adding Cadence code, arguments, authorization details, or other configuration.

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.build(fns);

Or import directly the specific function:

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import { build } from '@onflow/fcl';

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build(fns);

Usage

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import * as fcl from '@onflow/fcl';

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// Build a script interaction

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const scriptInteraction = await fcl.build([

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fcl.script`

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access(all) fun main(a: Int, b: Int): Int {

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return a + b

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}

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`,

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fcl.args([fcl.arg(1, fcl.t.Int), fcl.arg(2, fcl.t.Int)]),

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]);

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// Build a transaction interaction

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const txInteraction = await fcl.build([

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fcl.transaction`

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transaction(name: String) {

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prepare(account: AuthAccount) {

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log("Hello, " + name)

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}

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}

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`,

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fcl.args([fcl.arg('World', fcl.t.String)]),

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fcl.proposer(proposerAuthz),

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fcl.payer(payerAuthz),

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fcl.authorizations([authorizerAuthz]),

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fcl.limit(100),

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]);

Parameters

fns (optional)

• Type: (false | InteractionBuilderFn)[]
• Description: The functions to apply to the interaction

Returns

Promise<Interaction>

A promise of an interaction

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