7702 Unchained — Frontend

Sign & broadcast EIP-7702 delegation transactions from your browser with a mnemonic or from a ledger.

Built by ZKNOX.

Quick Start

npx serve .

Open http://localhost:3000 in Chrome.

Requirements

• Chrome (WebHID support required for Ledger tabs)
• A Ledger Nano S+ with the 7702 Unchained app sideloaded via ZKNOX orange, or rebuild from the ledger/ directory in this repo.
• No build step — everything loads from CDN (esm.sh)

Tabs

Mnemonic

Self-execution mode: BIP-39 mnemonic → m/44'/60'/0'/0/0 → EOA signs both the EIP-7702 authorization and the outer type-0x04 transaction.

• tx.nonce = N, auth.nonce = N+1
• Zero dependencies beyond the browser

Ledger+Relay

Sponsored delegation: the Ledger signs the EIP-7702 authorization (INS 0x08), a separate relay key signs and broadcasts the outer transaction.

• Relay can be a different account (sponsored gas) or the same EOA
• If relay == EOA, nonce logic adjusts automatically (auth.nonce = N+1)

Ledger Only

Full hardware signing: the Ledger signs both the authorization (INS 0x08) and the outer transaction hash (INS 0x09). No private key ever touches the browser.

• State machine enforced on-device: INS 0x09 only works immediately after a successful INS 0x08
• One-shot: the signing right is revoked after a single use

Networks

Sepolia, Holesky, Mainnet, or custom RPC.

Files

index.html      — Self-contained app (HTML + JS, no build)
zknox-logo.png  — ZKNOX logo

License

MIT — ZKNOX SAS 2025