Technical writing for active DeFi traders: how chain-mismatch drains happen, what RPC poisoning looks like on Solana, why hardware wallets show raw hex, and what the EIP-712 domain separator actually encodes.
How a stale RPC returns the wrong chain ID, why your wallet can't detect it, and the exact sequence from signing request to irreversible drain.
The EIP-712 domain separator encodes a chainId field for a reason. How Ledger firmware validates it — and what happens when that field doesn't match the network your RPC is pretending to be.
Solana's public RPC landscape has a documented history of endpoint compromise. How a malicious node redirects your Ed25519-signed transaction to a different program without touching your private key.
Arbitrum's Nitro upgrade changed the internal calldata format. Wallets that didn't update their ABI decoders left traders approving Nitro-format transactions they couldn't read. A technical breakdown of what changed and why it matters for signing.
Base runs a single centralised sequencer. What that means for transaction ordering, how to verify your signed transaction was submitted to the canonical endpoint, and what sequencer substitution looks like from the signing side.
A practical breakdown of multisig treasury operations across three chains: threshold coordination, hardware signing across different approval surfaces, and where the failure modes sit when signers are on different chain setups.
Why hardware wallets display raw hex instead of decoded intent, how to read calldata before you sign, and what a verified decode preview actually changes.
