pipe

Async pipe function to compose interactions.

The pipe function is the foundation for composing multiple interaction builder functions together. It sequentially applies builder functions to an interaction, allowing for complex interaction construction. Each function in the pipe receives the result of the previous function and can modify or validate the interaction.

Pipe has two main forms:

1. pipe(builderFunctions): Returns a builder function
2. pipe(interaction, builderFunctions): Directly executes the pipe on an interaction

Import

You can import the entire package and access the function:

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import * as fcl from "@onflow/fcl-core"

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fcl.pipe(fns)

Or import directly the specific function:

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import { pipe } from "@onflow/fcl-core"

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pipe(fns)

Usage

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

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// Using pipe to create a reusable builder

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const myTransactionBuilder = fcl.pipe([

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fcl.transaction`

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transaction(amount: UFix64) {

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prepare(account: AuthAccount) {

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log(amount)

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}

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}

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`,

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fcl.args([fcl.arg("10.0", fcl.t.UFix64)]),

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fcl.proposer(fcl.authz),

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fcl.payer(fcl.authz),

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fcl.authorizations([fcl.authz]),

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fcl.limit(100)

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]);

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// Use the builder

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const interaction = await fcl.build([myTransactionBuilder]);

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// Pipe is used internally by build() and send()

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await fcl.send([

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fcl.script`access(all) fun main(): Int { return 42 }`

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]); // This uses pipe internally

Parameters

fns

• Type: (false | InteractionBuilderFn)[]
• Description: Array of builder functions to apply

Returns

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export type InteractionBuilderFn = (

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ix: Interaction

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) => Interaction | Promise<Interaction>

An interaction builder function when called with just functions, or a Promise<Interaction> when called with an interaction and functions

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