Energy routing protocols are critical to the operation of the Energy Internet (EI), a decentralized and dynamic infrastructure designed to manage real-time power distribution between distributed energy resources (DERs) and consumers. These protocols must address key challenges, including subscriber matching (SM), energy-efficient path (EEP) selection, and real-time transmission scheduling (TS) in a demand-driven environment. Additionally, irreversible energy losses, congestion, and variable DER availability increase the complexity of routing decisions. This paper reviews core design considerations for energy routing in the EI and introduces blockchain as a transformative enabler for secure, transparent, and autonomous peer-to-peer (P2P) energy trading. Blockchain technology provides decentralized control, tamper-proof transaction records, and smart contract automation, improving trust, traceability, and real-time responsiveness. The proposed approach enhances energy security, transaction integrity, and interoperability in future decentralized smart grid networks.