For users
Your keys remain Bitcoin keys.
Address formats, transaction serialization, and sighash remain those of Bitcoin. Node binaries remain bitcoind, bitcoin-qt, bitcoin-cli. The default data directory remains ~/.bitcoin.
Continuity
- Bitcoin addresses are unchanged.
- Transaction format is unchanged.
- Sighash remains compatible.
- No transaction-level replay protection is added.
- You do not receive a new token.
Compatibility is not the same as finality.
Because the formats remain compatible, a transaction may be valid on both Purity and a compatible legacy history. That is a design choice with trade-offs. Lack of replay protection is not risk-free.