update

Updates a value in an interaction object using a transformation function.

Import

You can import the entire package and access the function:

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import * as sdk from "@onflow/sdk"

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sdk.update(key, fn)

Or import directly the specific function:

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import { update } from "@onflow/sdk"

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update(key, fn)

Usage

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import { update, put, initInteraction } from "@onflow/sdk"

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const interaction = initInteraction();

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// Set initial value

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put("counter", 0)(interaction);

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// Increment counter

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const increment = update("counter", (current) => (current || 0) + 1);

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increment(interaction); // counter becomes 1

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increment(interaction); // counter becomes 2

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// Update array

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put("tags", ["flow", "blockchain"])(interaction);

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const addTag = update("tags", (tags) => [...(tags || []), "web3"]);

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addTag(interaction); // tags becomes ["flow", "blockchain", "web3"]

Parameters

key

• Type: string
• Description: The dot-notation key path to update

fn (optional)

• Type: (v: T | T[], ...args: any[]) => T | T[]
• Description: The transformation function to apply to the existing value

Returns

function

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