Instanodes announced post-quantum account engineering for Ethereum Virtual Machine (EVM)-compatible networks and Solana, using hash-based digital signatures for account-level authorisation. The implementations adapt verification mechanisms to each blockchain’s execution environment and can be integrated into programmable smart-account architectures such as ERC-4337 on Ethereum, while on Solana they require custom program-level signature verification and do not replace the native Ed25519 transaction-signature infrastructure. Instanodes, which provides RPC endpoints across more than 50 blockchain networks, also offers quantum-readiness assessments and custom cryptographic engineering services, targeting exchanges, custodians and blockchain protocols. The company’s services include reviews of cryptographic dependencies, identification of quantum-vulnerable components and migration roadmaps, as well as development of on-chain verification mechanisms. 1