The final section of code in the file initializes the store:

/**
 * This function instantiates the Wasm module, fetches the transactions
 * from the API endpoint, and loads them into state and the Wasm
 * instance.
 */
export const initializeStore = async () => {
  const wasmTransactions = new WasmTransactions();
  store.wasm = await wasmTransactions.initialize();
  const transactions = await apiFetchTransactions();
  store.populateTransactions(transactions);
};

The initializeStore() function instantiates the Wasm module, fetches all transactions from the API, and populates the contents of state. This function is called from the application loading code in /src/main.js, which we'll cover in the next section.