@solana/functional

@solana/functional

This package contains generalized functional helpers and functional helpers specific to Solana application components. It can be used standalone, but it is also exported as part of Kit @solana/kit.

Functions

pipe()

Until the pipe operator becomes part of JavaScript you can use this utility to create pipelines.

const add = (a, b) => a + b;
const add10 = x => add(x, 10);
const add100 = x => add(x, 100);
const sum = pipe(1, add10, add100);
sum === 111; // true

A pipeline is one solution to performing consecutive operations on a value using functions, such as you would when building a transaction.

const transferTransactionMessage = pipe(
    // The result of the first expression...
    createTransactionMessage({ version: 0 }),
    // ...gets passed as the sole argument to the next function in the pipeline.
    tx => setTransactionMessageFeePayer(myAddress, tx),
    // The return value of that function gets passed to the next...
    tx => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
    // ...and so on.
    tx => appendTransactionMessageInstruction(createTransferInstruction(myAddress, toAddress, amountInLamports), tx),
);