To sign an Ethereum transaction offline, you build the transaction, sign it locally with your private key, and get back a serialized blob of hex. Then you hand that blob to the network with eth_sendRawTransaction, which checks it and drops it into the mempool. The signing and the sending are two separate acts, and the […] The post How to Sign a Transaction Offline and Broadcast It with eth_sendRawTransaction appeared first on NOWNodes Blog .