EIP Demo

Who signs, who sends, who pays gas, and what the contract checks.

First, drop some Apple to the EOA that wants to sign the permit. Anyone can sign a permit. The permission lasts for 1 hour. During that hour, Apple Farm can execute the token transfer gasless.

Apple token

…
Apple Farm balance…
Total supply…

Apple Farm Smart Account

…
RoleExecutes transfer
Bundlerhttps://bundler.geekyflare.com

Paymaster

…
Gas deposit…
Serverhttps://bundler.geekyflare.com/sponsor
1

Ask Apple Farm to drop tokens

Send Apple to the EOA that will sign.

2

Send Apple gasless (EOA → anyone)

Sign the permit, then tell Apple Farm to send before it expires.

Sign permit with

EIP-712 + EIP-3009 is implemented inside the ERC-20 token contract. No bundler is required: anyone can sign a token transfer, and anyone can submit it and pay gas.

BananaToken

…
Total supply…
BundlerNo bundler

Alice

…
Banana balance…
RoleSigns transfer

Relayer

…
Banana balance…
RoleSubmits and pays gas

Bob

…
Banana balance…
ETH balance…

Charles

…
Banana balance…
ETH balance…
1

Sign with Alice, send with Relayer

Alice signs. Relayer submits and pays gas. Receiver and amount are free input.

2

Any signer playground

Any signer can authorize a transfer. Relay pays gas.

Sign transfer with

3

Any signer, any relayer

Signer only signs locally. Relayer submits and pays gas.

Sign transfer with

Relay transaction with

7702 delegated EOA batch - Alice is the delegate contract EOA. Alice can send batch ERC-20 token transfers to many addresses in one transaction. Relayer submits and pays the fee.

Alice delegate EOA

…
Banana balance…
Approves7702 authorization

Delegate contract

…
FunctionexecuteBatch
Used byAlice EOA

Relayer

…
Pays gasYes
Submitstype-4 tx

BananaToken

…
Total supply…
Alice balance…

Bob

…
Banana balance…
ETH balance…

Charles

…
Banana balance…
ETH balance…
1

EIP-7702 authorization

Signer must be the delegate contract EOA: Alice. No bundler is used.

Format: address,amount. Each line becomes one ERC-20 transfer call.

2

Any relayer playground

Alice still signs the 7702 authorization. Any relayer can submit and pay gas.

Relay transaction with

EIP-4844 is a type-3 transaction. No contract is involved; Alice simply sends a transaction with blob data attached.

Alice EOA

…
RoleSends type-3 tx
PaysNormal gas + blob gas

Bob EOA

…
RoleReceives tx
Reads blobWith tx hash + Beacon API

Blob gas vs normal gas

Normal estimate—
Blob estimate—
RPC methodseth_estimateGas + eth_blobBaseFee
1

Alice sends blob message to Bob

Free input message. The message is attached as blob data.

RPC inspector
Connect to stream…