Each and every transform on the ledger is cryptographically signed to verify that the individual transferring bitcoins is the particular operator. No you can shell out cash 2 times simply because the moment a transaction is recorded within the ledger, each node inside the network will know about it. Namecoin https://edgarjxgjp.shoutmyblog.com/28304630/manual-article-review-is-required-for-this-article