const create = async (blockchain, from, to, amount) => {
    try {
        const unused = await findUnusedTransactions(blockchain, from, amount)
        const sum = unused.sum

        if (sum >= amount) {
            const trxn = new Transaction()

            for (let key in unused.trxns) {
                const unusedTx = unused.trxns[key]
                trxn.addVin(key, unusedTx.idx, from)
            }

            trxn.addVout(from, sum - amount) // Sender
            trxn.addVout(to, amount) // Receiver
            trxn.setID()

            return Promise.resolve(trxn)
        } else {
            return Promise.reject("Insufficient amount")
        }
    } catch (error) {
        return Promise.reject(error)
    }
}