Cauldron Swap

Cauldron DEX Swaps (BCH ↔ PUSD)

Swap between BCH and the PUSD stablecoin (ParyonUSD) on Bitcoin Cash using the Cauldron DEX. The CLI handles pool discovery, optimal multi-pool trade splitting, quoting, and broadcast.

CLI Location

/home/bot/repos/cashtoken-cli/cashtoken-cli.js

Always run from the repo directory:

cd /home/bot/repos/cashtoken-cli

Configuration

Wallet credentials are stored in .env:

cat /home/bot/repos/cashtoken-cli/.env

Set PRIVATE_KEY_WIF and NETWORK there, or pass --wif <WIF> at runtime. The token-aware address is auto-derived from the WIF.

PUSD Token Details

Available Commands

Check Balance

node cashtoken-cli.js balance --wif <WIF>

Buy PUSD with BCH (recommended — uses dollar amounts)

# Buy $1 PUSD (dry-run, shows quote first)
node cashtoken-cli.js buy-pusd --amount 1 --wif <WIF>

# Buy $1 PUSD (broadcast immediately)
node cashtoken-cli.js buy-pusd --amount 1 --wif <WIF> --yes

Sell PUSD for BCH (recommended — uses dollar amounts)

# Sell $1 PUSD (dry-run)
node cashtoken-cli.js sell-pusd --amount 1 --wif <WIF>

# Sell $1 PUSD (broadcast immediately)
node cashtoken-cli.js sell-pusd --amount 1 --wif <WIF> --yes

Generic Swap (any CashToken)

# Buy tokens with BCH
node cashtoken-cli.js swap-bch-for-token \
  -c <64-char-token-id> \
  -a <base-units> \
  --ticker <SYMBOL> \
  --wif <WIF> \
  --yes

# Sell tokens for BCH
node cashtoken-cli.js swap-token-for-bch \
  -c <64-char-token-id> \
  -a <base-units> \
  --ticker <SYMBOL> \
  --wif <WIF> \
  --yes

Typical Round-Trip Procedure

1. Check Balance

cd /home/bot/repos/cashtoken-cli && node cashtoken-cli.js balance --wif <WIF>

2. Buy PUSD

cd /home/bot/repos/cashtoken-cli && node cashtoken-cli.js buy-pusd --amount <Dollars> --wif <WIF> --yes

3. Verify PUSD received

cd /home/bot/repos/cashtoken-cli && node cashtoken-cli.js balance --wif <WIF>

4. Sell PUSD back to BCH

cd /home/bot/repos/cashtoken-cli && node cashtoken-cli.js sell-pusd --amount <Dollars> --wif <WIF> --yes

5. Verify BCH returned

cd /home/bot/repos/cashtoken-cli && node cashtoken-cli.js balance --wif <WIF>

How It Works

1. buy-pusd/sell-pusd hardcode the PUSD token category ID and convert dollar amounts to base units automatically (multiply by 10^decimals = 100)
2. The commands fetch all active Cauldron liquidity pools from the Cauldron indexer
3. The SDK computes the optimal trade split across pools using binary search on marginal rate — minimizes price impact
4. Each pool charges 0.3% LP fee
5. Without --yes, the command shows a quote and exits (dry-run mode)
6. With --yes, it broadcasts the transaction and returns the TXID

Notes

• Dry-run by default: Always verify the quote before passing --yes
• Dust amount: Token outputs require ~1000 satoshis dust (handled automatically)
• Amount precision: PUSD has 2 decimals, so --amount 1 = 100 base units = $1 PUSD
• No Cauldron fee: Only 0.3% LP fee paid to pool providers, plus BCH network fee
• WIF can be omitted if PRIVATE_KEY_WIF is set in the .env file