ENS Primary Name

Set your primary ENS name on Base and other L2 chains via the ENS Reverse Registrar.

A primary name creates a bi-directional link:

• Forward: name.eth → 0x1234... (set in ENS resolver)
• Reverse: 0x1234... → name.eth (set via this skill)

Requirements

Required: Transaction Signing

This skill requires a way to sign and submit transactions. It looks for the bankr skill which provides wallet functionality via the Bankr API.

If you don't have bankr installed:

1. Install from: https://github.com/BankrBot/thinkfleet-skills (bankr skill)
2. Or modify the scripts to use your own transaction submission method

The scripts call bankr.sh with a prompt like:

Submit this transaction: {"to": "0x...", "data": "0x...", "value": "0", "chainId": 8453}

You can replace the find_bankr() function in each script with your own wallet/signer.

Required: Node.js

Scripts use Node.js with viem for ENS namehash calculation and ABI encoding.

npm install -g viem

Quick Start

# Set primary name on Base
./scripts/set-primary.sh myname.eth

# Set on specific chain
./scripts/set-primary.sh myname.eth arbitrum

# Verify primary name is set
./scripts/verify-primary.sh 0x1234... base

# Set avatar (L1 only)
./scripts/set-avatar.sh myname.eth https://example.com/avatar.png

Supported Chains

Chain	Reverse Registrar
Base	0x0000000000D8e504002cC26E3Ec46D81971C1664
Arbitrum	0x0000000000D8e504002cC26E3Ec46D81971C1664
Optimism	0x0000000000D8e504002cC26E3Ec46D81971C1664
Ethereum	0x283F227c4Bd38ecE252C4Ae7ECE650B0e913f1f9

Prerequisites

1. Own or control an ENS name - The name must be registered
2. Forward resolution configured - The name must resolve to your address
3. Native tokens for gas - ETH on the target chain

How It Works

1. Checks forward resolution exists (name → address)
2. Warns if chain-specific address is not set
3. Encodes setName(string) calldata
4. Submits transaction to the Reverse Registrar
5. Verifies the primary name is correctly set

Verification

The skill automatically verifies after setting. You can also verify manually:

./scripts/verify-primary.sh 0xYourAddress base

Output:

✅ Reverse record: 0x1234... → myname.eth
✅ Forward resolution: myname.eth → 0x1234...
🎉 PRIMARY NAME VERIFIED: myname.eth

Setting Avatars

# Set avatar (requires L1 transaction + ETH for gas)
./scripts/set-avatar.sh myname.eth https://example.com/avatar.png

Supported avatar formats:

• HTTPS: https://example.com/image.png
• IPFS: ipfs://QmHash
• NFT: eip155:1/erc721:0xbc4ca.../1234

Note: Avatars are text records stored on Ethereum mainnet. The script automatically looks up the resolver for your ENS name (works with both public and custom resolvers).

Troubleshooting

Issue	Solution
"Transaction reverted"	Ensure the ENS name resolves to your address
"Name not showing"	Forward resolution may not be set for that chain's cointype
"Not authorized"	You must call from the address the name resolves to
"bankr.sh not found"	Install bankr skill or modify scripts to use your signer
"Chain-specific address not set"	Set the address for the target chain via app.ens.domains
"Could not find resolver"	Ensure the ENS name exists and has a resolver set

Customization

Using a Different Wallet/Signer

Replace the find_bankr() function in the scripts:

# Example: use cast (foundry) instead
send_tx() {
  local to="$1" data="$2" chain_id="$3"
  cast send "$to" --data "$data" --rpc-url "https://..." --private-key "$PRIVATE_KEY"
}

Links

• ENS Docs: https://docs.ens.domains/web/reverse
• ENS App: https://app.ens.domains
• Primary Names UI: https://primary.ens.domains
• Bankr Skill: https://github.com/BankrBot/thinkfleet-skills