# ens-primary-name

> Set your primary ENS name on Base, Arbitrum, Optimism, and Ethereum mainnet via the ENS Reverse Registrar, creating a bi-directional link between your address and ENS name.

- Skill: `bankrbot/ens-primary-name` (Agent Skill, multi-file: 5 files)
- Install (CLI): `npx skillmds add bankrbot/ens-primary-name`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bankrbot/ens-primary-name/raw
- Safety review: CAUTION (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend, Coding & Dev Tools, Integrations & APIs, Browser Automation, SaaS Connectors
- Tags: Arbitrum, Bankr Cli, Base, Ens, Ethereum, Optimism, Reverse Registrar, Viem
- Author: BankrBot (https://skillmd.com/u/bankrbot)
- Updated: 2026-07-06
- Page: https://skillmd.com/skills/bankrbot/ens-primary-name

---


# 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: Bankr CLI

This skill requires the **Bankr CLI** for transaction signing:

```bash
bun install -g @bankr/cli
bankr login
```

The scripts use `bankr agent` to submit transactions like:
```
Submit this transaction: {"to": "0x...", "data": "0x...", "value": "0", "chainId": 8453}
```

### Required: Node.js

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

```bash
npm install -g viem
```

## Quick Start

```bash
# 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:

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

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

## Setting Avatars

```bash
# 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 CLI not found" | Install with `bun install -g @bankr/cli && bankr login` |
| "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 |

## Links

- ENS Docs: https://docs.ens.domains/web/reverse
- ENS App: https://app.ens.domains
- Primary Names UI: https://primary.ens.domains
- Bankr CLI: https://www.npmjs.com/package/@bankr/cli