A planned new transaction type (Hegotá) where accounts choose their own signature scheme and can rotate keys.
Why it matters: The native way for accounts to move off ECDSA to quantum-safe signatures.
On the map: pluggable signature schemes + key rotation: the native off-ramp from ECDSA
Map note, rests on: the account's own scheme: ECDSA today, leanSPHINCS later
A new transaction type (EIP-8141)[1], scheduled for Hegotá. Instead of one fixed ECDSA signature, a transaction carries "frames" whose verification logic the account defines, with pluggable signature schemes and native key rotation.
It is the native off-ramp from ECDSA: accounts could move to post-quantum signatures such as leanSPHINCS[2] without changing their address. On its own it adds no cryptography. Each account rests on whichever scheme it uses.
If any of these breaks, this breaks too.
If this breaks, these break with it.
Nothing on the map depends on it: it is an end point of the roadmap.
Next-step links, not dependencies: these don't fall together.