# Unified EVM Address

One address on every EVM chain — the identical address string on Ethereum, Base, BSC, Arbitrum,
Polygon and Optimism.

Deriving a different address per EVM chain multiplies your reconciliation surface for no
cryptographic reason: the curve and the derivation are identical. Vaultody derives one address
string that is valid on every EVM chain you use, so a user, a merchant or a desk has one identity
across the set.

## Pure key math, no wrappers

- **Same key, same address** — your vault holds one MPC key and derivation walks the same path on
  every EVM chain, so index n is the same address on all of them. No smart-contract wrapper, no
  account-abstraction dependency, nothing to deploy per chain and nothing extra to audit.
- **Whitelist once** — counterparties that allow-list your address do it once for the whole EVM
  set, literally the same string everywhere.
- **Reconciliation stops branching** — one address in your database, one row per counterparty,
  whichever chain the funds arrive on.
- **Enable a chain and monitoring starts there** — same address, new coverage.

## FAQ

**What if someone sends to a chain we have not enabled?**
The funds are safe. The key controls the address on every EVM chain regardless; enable the chain
and the balance is visible. Nothing is ever lost.

**Is this account abstraction?**
No — plain EOA key derivation. No wrapper contracts, no relayers, no per-chain deployments.

## Related

- [All Supported Blockchains](/features/all-blockchains)
- [Key Management](/features/key-management)
- [What we support](/what-we-support)
- [Integrations: Blockchains](/integrations/protocols)