RPC//Infura

- Node-as-a-Service: runs full Ethereum nodes so you don't have to sync one yourself.

Node-as-a-Service: runs full Ethereum nodes so you don't have to sync one yourself.

API Key authenticates and rate-limits your usage — NOT for cryptographic security of transactions.

Acts as a gateway: receives your signed transaction, relays it to its fleet of nodes, which gossip it to the network.

Flow: your DApp → HTTPS → Infura → TCP/P2P gossip → validators.

Transaction security comes from ECDSA signatures done in the wallet, not from Infura's infrastructure.