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Add warning for safe 7702 upgrades #156

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Merged
amiecorso merged 3 commits into from
Jan 14, 2026
Merged

Add warning for safe 7702 upgrades #156

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89305a6
add warning not to 7702-delegate directly to CBSW impl
amiecorso Jan 14, 2026
94c1da2
update text for gh style warning
amiecorso Jan 14, 2026
f4b574c
match katzman's
amiecorso Jan 14, 2026
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8 changes: 8 additions & 0 deletions README.md
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Expand Up @@ -78,6 +78,14 @@ Today, allowed are
- MultiOwnable.removeOwnerAtIndex
- UUPSUpgradeable.upgradeToAndCall

> [!WARNING]
> ## EIP-7702 delegation safety
> Do **not** directly delegate to a Coinbase Smart Wallet **implementation** contract via EIP-7702. Delegating directly to an implementation can create a security vulnerability.
>
> Instead:
> - Use the `EIP7702Proxy` pattern: [base/eip-7702-proxy](https://github.com/base/eip-7702-proxy)
> - See Coinbase Developer Platform docs for further guidance and an example of performing a safe EIP-7702 upgrade: [EIP-7702 FAQs – safe upgrade](https://docs.cdp.coinbase.com/paymaster/need-to-knows/eip-7702-faqs#how-do-i-upgrade-my-wallet-to-7702)

## Deployments
Factory and implementation are deployed via [Safe Singleton Factory](https://github.com/safe-global/safe-singleton-factory), which today will give the same address across 248 chains. See "Deploying" below for instructions on how to deploy to new chains.
| Version | Factory Address |
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