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Convert desired token amounts to base lots — the most common agent mistake.
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Basé sur la classification professionnelle SOC
| name | vulcan-lot-size-calculator |
| version | 1.0.0 |
| description | Convert desired token amounts to base lots — the most common agent mistake. |
| metadata | {"openclawd":{"category":"finance"},"requires":{"bins":["vulcan"],"skills":["vulcan"]}} |
Use this skill for:
Vulcan's size field is in base lots, not tokens or USD. Getting this wrong means trading 100x more or less than intended.
For market orders, prefer tokens or notional_usdc when you do not need lot-level control. Use this skill when passing size, placing limit orders, or checking exact lot math.
vulcan_market_info → { symbol: "SOL" }
Extract base_lots_decimals from the response.
base_lots = desired_tokens * 10^base_lots_decimals
vulcan_trade → { symbol: "SOL", side: "buy", order_type: "market", size: <base_lots>, acknowledged: true }
Market-order shortcut:
vulcan_trade → { symbol: "SOL", side: "buy", order_type: "market", tokens: 0.5, acknowledged: true }
vulcan_trade → { symbol: "SOL", side: "buy", order_type: "market", notional_usdc: 100, acknowledged: true }
| Want | Calculation | Base lots |
|---|---|---|
| 0.1 SOL | 0.1 * 10^2 = 0.1 * 100 | 10 |
| 0.5 SOL | 0.5 * 100 | 50 |
| 1 SOL | 1 * 100 | 100 |
| 5 SOL | 5 * 100 | 500 |
| Want | Calculation | Base lots |
|---|---|---|
| 0.001 BTC | 0.001 * 10^4 = 0.001 * 10000 | 10 |
| 0.01 BTC | 0.01 * 10000 | 100 |
| 0.1 BTC | 0.1 * 10000 | 1000 |
| Want | Calculation | Base lots |
|---|---|---|
| 0.01 ETH | 0.01 * 10^3 = 0.01 * 1000 | 10 |
| 0.1 ETH | 0.1 * 1000 | 100 |
| 1 ETH | 1 * 1000 | 1000 |
To trade a specific USD amount via base lots:
vulcan_market_ticker → { symbol }desired_tokens = usd_amount / mark_pricebase_lots = desired_tokens * 10^base_lots_decimalsExample: $100 worth of SOL at $150/SOL, decimals=2:
tokens = 100 / 150 = 0.6667
base_lots = 0.6667 * 100 = 66.67 → round to 67
For market orders, notional_usdc performs this sizing internally and quotes at current mid; actual fill can differ by spread and impact.
Passing token amount as size — If you want 0.5 SOL and pass size: 0.5, you'll get 0.005 SOL (0.5 base lots at decimals=2). Always multiply.
Using the wrong decimals — Each market has different base_lots_decimals. SOL=2, BTC=4, ETH=3. Always fetch fresh from vulcan_market_info.
Not rounding — Base lots must be whole numbers. Round to nearest integer after calculation.
Caching decimals across markets — Different markets have different decimals. Fetch per-market.
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