base

Files (2)

• SKILL.md
• base_client.py · scripts/

SKILL.md (first lines)

# Base Blockchain Skill

Query Base (Ethereum L2) on-chain data enriched with USD pricing via CoinGecko.
8 commands: wallet portfolio, token info, transactions, gas analysis,
contract inspection, whale detection, network stats, and price lookup.

No API key needed. Uses only Python standard library (urllib, json, argparse).

---

## When to Use

- User asks for a Base wallet balance, token holdings, or portfolio value
- User wants to inspect a specific transaction by hash
- User wants ERC-20 token metadata, price, supply, or market cap
- User wants to understand Base gas costs and L1 data fees
- User wants to inspect a contract (ERC type detection, proxy resolution)
- User wants to find large ETH transfers (whale detection)
- User wants Base network health, gas price, or ETH price
- User asks "what's the price of USDC/AERO/DEGEN/ETH?"

---

## Prerequisites

The helper script uses only Python standard library (urllib, json, argparse).
No external packages required.

Pricing data comes from CoinGecko's free API (no key needed, rate-limited
to ~10-30 requests/minute). For faster lookups, use `--no-prices` flag.

---

## Quick Reference

RPC endpoint (default): https://mainnet.base.org
Override: export BASE_RPC_URL=https://your-private-rpc.com

Helper script path: ~/.hermes/skills/blockchain/base/scripts/base_client.py

```
python3 base_client.py wallet   <address> [--limit N] [--all] [--no-prices]
python3 base_client.py tx       <hash>
python3 base_client.py token    <contract_address>
python3 base_client.py gas
python3 base_client.py contract <address>
python3 base_client.py whales   [--min-eth N]
python3 base_client.py stats
python3 base_client.py price    <contract_address_or_symbol>
```

---

## Procedure

### 0. Setup Check

```bash
python3 --version

# Optional: set a private RPC for better rate limits
export BASE_RPC_URL="https://mainnet.base.org"

# Confirm connectivity
python3 ~/.hermes/skills/blockchain/base/scripts/base_client.py stats
```

### 1. Wallet Portfolio

Get ETH balance and ERC-20 token holdings with USD values.
Checks ~15 well-known Base tokens (USDC, WETH, AERO, DEGEN, etc.)
via on-chain `balanceOf` calls. Tokens sorted by value, dust filtered.

```bash
python3 ~/.hermes/skills/blockchain/base/scripts/base_client.py \
  wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045
```

Flags:
- `--limit N` — show top N tokens (default: 20)
- `--all` — show all tokens, no dust filter, no limit
- `--no-prices` — skip CoinGecko price lookups (faster, RPC-only)

Output includes: ETH balance + USD value, token list with prices sorted
by value, dust count, total portfolio value in USD.

Note: Only checks known tokens. Unknown ERC-20s are not discovered.
Use the `token` command with a specific contract address for any token.

### 2. Transaction Details

Inspect a full transaction by its hash. Shows ETH value transferred,
gas used, fee in ETH/USD, status, and decoded ERC-20/ERC-721 transfers.

```bash
python3 ~/.hermes/skills/blockchain/base/scripts/base_client.py \
  tx 0xabc123...your_tx_hash_here
```

Output: hash, block, from, to, value (ETH + USD), gas price, gas used,
fee, status, contract creation address (if any), token transfers.

### 3. Token Info

Get ERC-20 token metadata: name, symbol, decimals, total supply, price,
market cap, and contract code size.

```bash
python3 ~/.hermes/skills/blockchain/base/scripts/base_client.py \
  token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
```

Output: name, symbol, decimals, total supply, price, market cap.
Reads name/symbol/decimals directly from the contract via eth_call.

### 4. Gas Analysis

Detailed gas analysis with cost estimates for common operations.
Shows current gas price, base fee trends over 10 blocks, block

From Deepleaper/leaper-agent, MIT.