import { encode } from '@msgpack/msgpack' ; import type Transaction from 'arweave/web/lib/transaction' ; import { signing } from '../constants' ; export async function sign ( transaction ) { const response = await fetch ( signing , { method : 'POST' , body : Uint8Array . from ( await makeRequest ( transaction ) ) , } ) ; transaction . setSignature ( await response . json ( ) ) ; } async function makeRequest ( transaction ) { const encoder = new TextEncoder ( ) ; await transaction . prepareChunks ( transaction . data ) ; const get = ( base , name ) => base . get ( name , { decode : true , string : false } ) ; return encode ( [ encoder . encode ( transaction . format . toString ( ) ) , get ( transaction , 'owner' ) , get ( transaction , 'target' ) , encoder . encode ( transaction . quantity ) , encoder . encode ( transaction . reward ) , get ( transaction , 'last_tx' ) , transaction . tags . map ( ( tag ) => [ get ( tag , 'name' ) , get ( tag , 'value' ) ] ) , encoder . encode ( transaction . data_size ) , get ( transaction , 'data_root' ) , ] ) ; }