| name | bsc-pancakeswap |
| description | PancakeSwap DEX trading on BSC — swap workflows, pre-flight safety checks, slippage/liquidity rules, and common token addresses. Read this before any DEX swap operation. Signing is handled by goo-bsc-wallet. |
PancakeSwap DEX Trading
This skill covers how to execute swaps on PancakeSwap V2. All signing and broadcasting go through goo-core wallet tools — see skills/goo-bsc-wallet/SKILL.md for wallet tools and risk rules.
Architecture
This Skill (knowledge only) goo-core wallet layer
─────────────────────── ─────────────────────
Swap workflow guidance bsc_prepare_tx
Pre-flight checks (slippage, etc.) bsc_analyze_tx ← tx-risk-analyzer.ts
Token addresses & router ABI bsc_sign_and_send_tx ← wallet signing
bsc_wallet_overview (verify)
This skill provides no tools — it is pure knowledge. You build swap calldata using ethers.js and the Router ABI, then sign via goo-core wallet tools.
Swap Methods (PancakeSwap V2 Router)
| Method | Use case | value |
|---|
swapExactETHForTokens | BNB -> Token | amountIn |
swapExactTokensForETH | Token -> BNB (approve first) | 0 |
swapExactTokensForTokens | Token -> Token (approve first) | 0 |
swapTokensForExactTokens | Token -> Token, exact output (approve first) | 0 |
Swap Workflows
BNB -> Token
bsc_wallet_overview — confirm BNB covers swap amount + gas- Check token contract responds to
symbol() / decimals() (honeypot filter)
- Check pair exists with non-zero reserves
- Get quote via
getAmountsOut — apply pre-flight checks (see below)
- Build calldata:
router.swapExactETHForTokens(amountOutMin, [WBNB, token], to, deadline)
bsc_sign_and_send_tx with value = amountInbsc_wallet_overview — verify balance change
Token -> BNB (requires approve)
- Steps 1-4 as above (reverse direction)
- Approve: build
token.approve(ROUTER, exactAmount) — never use MaxUint256
bsc_sign_and_send_tx the approve tx- Build calldata:
router.swapExactTokensForETH(amountIn, amountOutMin, [token, WBNB], to, deadline)
bsc_sign_and_send_tx the swap txbsc_wallet_overview — verify
Token -> Token (multi-hop)
Path: [tokenA, WBNB, tokenB] when no direct pair exists.
Flow: approve tokenA -> swap via multi-hop path. Same as Token -> BNB but with extended path.
DEX Pre-Flight Checks
Run these before building the swap transaction:
| Check | Condition | Action |
|---|
| Honeypot detection | Contract doesn't respond to symbol() / decimals() | Stop |
| No liquidity | Pair reserves = 0 | Stop |
| Extreme slippage | > 15% | Stop |
| High slippage | 5-15% | Warn |
| Large swap | > 50% of your balance | Warn |
| Pool impact | Swap > 10% of pool liquidity | Warn |
| Gas cost ratio | Gas > 5% of swap value | Warn |
These checks are instruction-layer guidance. Even if bypassed, goo-core's tx-risk-analyzer.ts still enforces code-level risk analysis at signing time (see skills/goo-bsc-wallet/SKILL.md).
Security Rules (DEX-specific)
- Exact approvals only — always approve the exact swap amount, never MaxUint256.
- Deadline protection — set deadline to current time + 5 minutes on every swap.
- Slippage limits — set
amountOutMin based on quote minus acceptable slippage (default: 1-3%).
- Verify after swap — always call
bsc_wallet_overview after to confirm balance changes.
- No V3 — this skill covers PancakeSwap V2 only.
For general wallet security rules (private key isolation, risk analysis, gas preservation), see skills/goo-bsc-wallet/SKILL.md.
Common Token Addresses
BSC Mainnet
| Token | Address |
|---|
| WBNB | 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c |
| USDT | 0x55d398326f99059fF775485246999027B3197955 |
| BUSD | 0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56 |
| USDC | 0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d |
| PancakeSwap V2 Router | 0x10ED43C718714eb63d5aA57B78B54704E256024E |
BSC Testnet
| Token | Address |
|---|
| WBNB | 0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd |
| PancakeSwap V2 Router | 0xD99D1c33F9fC3444f8101754aBC46c52416550D1 |
