ERC-7730
DRAFT

Clear Signing Format

Summary

ERC-7730 defines a standard JSON descriptor format for structured calldata, enabling wallets to display human-readable descriptions of smart contract calls. Instead of showing raw hex calldata, wallets that implement ERC-7730 can show decoded function names and parameters in plain language. For example, "Approve 100 USDC for Aave" instead of the raw 0x095ea7b3... bytes.

Why It Matters

Without calldata decoding, users must trust that the signing prompt correctly represents the transaction they intended to authorize, a significant attack surface. ERC-7730 allows wallets to independently display what a transaction actually does so users can confirm function names, amounts, and addresses before signing.

Software Wallets by ERC-7730 Support

Platforms
Sources
Ambire

Ambire

✅ Supported
  • ✅ Browser extension
–
MetaMask

MetaMask

❌ Not supported
  • ❌ Mobile app
  • ❌ Browser extension
–
Rabby

Rabby

❌ Not supported
  • ❌ Mobile app
  • ❌ Browser extension
–
Rainbow

Rainbow

❌ Not supported
  • ❌ Mobile app
  • ❌ Browser extension
–
Zerion

Zerion

❌ Not supported
  • ❌ Mobile app
  • ❌ Browser extension
–
Base App

Base App

? Unknown
  • ? Mobile app
–
Bitget Wallet

Bitget Wallet

? Unknown
  • ? Mobile app
  • ? Browser extension
–
Daimo

Daimo

? Unknown
  • ? Mobile app
–
Elytro

Elytro

? Unknown
  • ? Mobile app
  • ? Browser extension
–
Family

Family

? Unknown
  • ? Mobile app
–
Frame

Frame

? Unknown
  • ? Desktop app
  • ? Browser extension
–
Gem Wallet

Gem Wallet

? Unknown
  • ? Mobile app
–
imToken

imToken

? Unknown
  • ? Mobile app
–
Bridge Wallet

Bridge Wallet

? Unknown
  • ? Mobile app
  • ? Browser extension
–
NuFi

NuFi

? Unknown
  • ? Browser extension
–
OKX Wallet

OKX Wallet

? Unknown
  • ? Mobile app
  • ? Browser extension
–
Phantom

Phantom

? Unknown
  • ? Mobile app
  • ? Browser extension
–
PillarX

PillarX

? Unknown
  • ? Mobile app
  • ? Browser extension
–
Safe

Safe

? Unknown
  • ? Mobile app
  • ? Browser extension
–
Uniswap Wallet

Uniswap Wallet

? Unknown
  • ? Mobile app
  • ? Browser extension
–
Zeus

Zeus

? Unknown
  • ? Desktop app
–

Hardware Wallets by ERC-7730 Support

Platforms
Sources
BitBox

BitBox

❌ Not supported
  • ❌ Hardware wallet
Cypherock Wallet

Cypherock Wallet

❌ Not supported
  • ❌ Hardware wallet
Firefly Wallet

Firefly Wallet

❌ Not supported
  • ❌ Hardware wallet
–
GridPlus Wallet

GridPlus Wallet

❌ Not supported
  • ❌ Hardware wallet
imKey

imKey

❌ Not supported
  • ❌ Hardware wallet
–
Keycard Shell

Keycard Shell

❌ Not supported
  • ❌ Hardware wallet
Keystone Wallet

Keystone Wallet

❌ Not supported
  • ❌ Hardware wallet
Ledger Wallet

Ledger Wallet

❌ Not supported
  • ❌ Hardware wallet
NGRAVE Zero

NGRAVE Zero

❌ Not supported
  • ❌ Hardware wallet
OneKey Pro

OneKey Pro

❌ Not supported
  • ❌ Hardware wallet
Trezor Wallet

Trezor Wallet

❌ Not supported
  • ❌ Hardware wallet