# DODO PMM Integration Documentation

**Date**: 2025-01-12  
**Status**: Implementation Guide  
**Purpose**: Integration with DODO Proactive Market Maker (PMM) for liquidity pools

---

## Overview

DODO PMM Integration enables liquidity pools between CompliantUSDT (cUSDT)/CompliantUSDC (cUSDC) and official USDT/USDC tokens. This provides:

- **Exchangeability**: Users can swap between compliant and official tokens
- **Price Stability**: PMM algorithm maintains 1:1 peg
- **Liquidity**: Efficient capital utilization
- **Arbitrage Opportunities**: Market-driven peg maintenance

---

## Architecture

### Contract: DODOPMMIntegration

**Location**: `contracts/dex/DODOPMMIntegration.sol`

**Purpose**: 
- Create and manage DODO PMM pools
- Facilitate swaps between compliant and official tokens
- Manage liquidity provision

**Key Features**:
- Pool creation (cUSDT/USDT, cUSDC/USDC, cUSDT/cUSDC, and generic pairs)
- Liquidity management
- Swap execution
- Price discovery via PMM algorithm

### Public Pool Pairs (VAULT_SYSTEM_MASTER_TECHNICAL_PLAN §4)

The Master Plan specifies four **public** liquidity pool types for user routing and price discovery (not primary stabilization):

| Pair | Creation method | Notes |
|------|-----------------|--------|
| **cUSDT / cUSDC** | `createCUSDTCUSDCPool(lpFeeRate, initialPrice, k, isOpenTWAP)` | Dedicated function; swap via `swapCUSDTForUSDC` / `swapUSDCForCUSDT`. Register in DODOPMMProvider for getQuote/executeSwap. |
| **cUSDT / XAU** | `createPool(cUSDT, xauTokenAddress, ...)` | Use the Chain 138 XAU anchor token address (`cXAUC` or `cXAUT`) and the generic `createPool`. |
| **cUSDC / XAU** | `createPool(cUSDC, xauTokenAddress, ...)` | Same as above. |
| **cEURT / XAU** | `createPool(cEURTAddress, xauTokenAddress, ...)` | Requires `cEURT` and a Chain 138 XAU anchor token (`cXAUC` or `cXAUT`). |

For cUSDT/XAU, cUSDC/XAU, and cEURT/XAU: use the deployed Chain 138 XAU anchor token (`cXAUC` at `0x290E52a8819A4fbD0714E517225429aA2B70EC6b` or `cXAUT` at `0x94e408E26c6FD8F4ee00b54dF19082FDA07dC96E`), then call `createPool(baseToken, quoteToken, lpFeeRate, initialPrice, k, isOpenTWAP)` with `POOL_MANAGER_ROLE`. **Unit:** 1 full XAU token = **1 troy ounce** of gold (`10^6` base units with 6 decimals). Public pools serve user routing, price discovery, and flash loan access; they do not serve as the primary stabilization engine (see Master Plan private mesh).

### Planned `cUSDW / cUSDC_V2` hub pool

For the repo-native D-WIN stabilization path on Chain 138, the generic `createPool` flow is also the correct path for `cUSDW / cUSDC_V2`.

- `baseToken`: `cUSDW` (`0xcA6BFa614935f1AB71c9aB106bAA6FBB6057095e`)
- `quoteToken`: `cUSDC_V2` (`0x219522c60e83dEe01FC5b0329d6fA8fD84b9D13d`)
- decimals: both `6`
- script support: `script/dex/CreateCUSDWCUSDCV2Pool.s.sol` and `script/dex/AddLiquidityCUSDWCUSDCV2PoolChain138.s.sol`

See [docs/03-deployment/CUSDW_CUSDC_V2_HUB_POOL_RUNBOOK.md](../../../docs/03-deployment/CUSDW_CUSDC_V2_HUB_POOL_RUNBOOK.md) for the full operator sequence.

---

## DODO PMM Overview

### Proactive Market Maker (PMM)

DODO's PMM algorithm:
- Uses external price oracles (TWAP)
- Maintains price stability through automated market making
- More capital efficient than traditional AMMs
- Lower slippage for stablecoin pairs

### Pool Types

**DODO Vending Machine (DVM)**:
- Most common for custom pairs
- Supports single-sided liquidity provision
- Better for stablecoin pairs

**Key Parameters**:
- `i`: Initial price (1e18 = $1 for stablecoins)
- `k`: Slippage factor (lower = less slippage, 0.5e18 recommended)
- `lpFeeRate`: LP fee in basis points (3 = 0.03%)
- `isOpenTWAP`: Enable time-weighted average price oracle

---

## Deployment

### Prerequisites

1. **DODO Contracts** (check DODO docs for chain-specific addresses):
   - DODO Vending Machine Factory
   - DODO Approve (optional, for gas optimization)

2. **Token Addresses**:
   - Official USDT/USDC (on target chain)
   - Compliant cUSDT/cUSDC (on Chain 138)

3. **Network**: Deploy on chain where official tokens exist

### Deployment Steps

#### Step 1: Set Environment Variables

```bash
# In .env file
PRIVATE_KEY=0x...
RPC_URL=https://...

# DODO contracts (example for Ethereum Mainnet - check DODO docs)
DODO_VENDING_MACHINE_ADDRESS=0x... # DODO Vending Machine Factory
DODO_APPROVE_ADDRESS=0x... # Optional

# Official tokens on Chain 138 (local quote-side mirror stables)
OFFICIAL_USDT_ADDRESS=0x004b63A7B5b0E06f6bB6adb4a5F9f590BF3182D1
OFFICIAL_USDC_ADDRESS=0x71D6687F38b93CCad569Fa6352c876eea967201b

# Compliant tokens
COMPLIANT_USDT_ADDRESS=0x93E66202A11B1772E55407B32B44e5Cd8eda7f22
COMPLIANT_USDC_ADDRESS=0xf22258f57794CC8E06237084b353Ab30fFfa640b

# Admin
DODO_INTEGRATION_ADMIN=0x...
```

#### Step 2: Deploy Contract

```bash
cd smom-dbis-138

forge script script/dex/DeployDODOPMMIntegration.s.sol:DeployDODOPMMIntegration \
  --rpc-url $RPC_URL \
  --broadcast \
  --legacy \
  --gas-price 30000000000 \
  --via-ir \
  -vv

# Save deployed address
export DODO_PMM_INTEGRATION_ADDRESS=<deployed_address>
```

---

## Pool Creation

### Create cUSDT/USDT Pool

```bash
# Pool parameters
LP_FEE_RATE=3              # 0.03% = 3 basis points
INITIAL_PRICE=1000000000000000000  # 1e18 = $1
K_FACTOR=500000000000000000        # 0.5e18 = 50% slippage factor
ENABLE_TWAP=true           # Enable TWAP oracle

cast send $DODO_PMM_INTEGRATION_ADDRESS \
  "createCUSDTUSDTPool(uint256,uint256,uint256,bool)" \
  $LP_FEE_RATE \
  $INITIAL_PRICE \
  $K_FACTOR \
  $ENABLE_TWAP \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy \
  -vv

# Get pool address
POOL_ADDRESS=$(cast call $DODO_PMM_INTEGRATION_ADDRESS \
  "pools(address,address)" \
  $COMPLIANT_USDT_ADDRESS \
  $OFFICIAL_USDT_ADDRESS \
  --rpc-url $RPC_URL | cast --to-addr)
```

### Create cUSDC/USDC Pool

```bash
cast send $DODO_PMM_INTEGRATION_ADDRESS \
  "createCUSDCUSDCPool(uint256,uint256,uint256,bool)" \
  $LP_FEE_RATE \
  $INITIAL_PRICE \
  $K_FACTOR \
  $ENABLE_TWAP \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy \
  -vv
```

---

## Liquidity Provision

### Add Liquidity to Pool

```bash
# Parameters
POOL_ADDRESS=0x...  # Pool address from creation
BASE_AMOUNT=1000000000000   # Amount of base token (cUSDT/cUSDC)
QUOTE_AMOUNT=1000000000000  # Amount of quote token (USDT/USDC)

# 1. Approve tokens to integration contract
cast send $COMPLIANT_USDT_ADDRESS \
  "approve(address,uint256)" \
  $DODO_PMM_INTEGRATION_ADDRESS \
  $BASE_AMOUNT \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy

cast send $OFFICIAL_USDT_ADDRESS \
  "approve(address,uint256)" \
  $DODO_PMM_INTEGRATION_ADDRESS \
  $QUOTE_AMOUNT \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy

# 2. Add liquidity
cast send $DODO_PMM_INTEGRATION_ADDRESS \
  "addLiquidity(address,uint256,uint256)" \
  $POOL_ADDRESS \
  $BASE_AMOUNT \
  $QUOTE_AMOUNT \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy \
  -vv
```

---

## Swapping

### Swap cUSDT → USDT

```bash
AMOUNT_IN=1000000000000      # 1,000,000 cUSDT (6 decimals)
MIN_AMOUNT_OUT=999000000000  # Minimum USDT to receive (slippage protection)

# 1. Approve cUSDT
cast send $COMPLIANT_USDT_ADDRESS \
  "approve(address,uint256)" \
  $DODO_PMM_INTEGRATION_ADDRESS \
  $AMOUNT_IN \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy

# 2. Execute swap
cast send $DODO_PMM_INTEGRATION_ADDRESS \
  "swapCUSDTForUSDT(address,uint256,uint256)" \
  $POOL_ADDRESS \
  $AMOUNT_IN \
  $MIN_AMOUNT_OUT \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy \
  -vv
```

### Swap USDT → cUSDT

```bash
# Similar process, using swapUSDTForCUSDT()
cast send $DODO_PMM_INTEGRATION_ADDRESS \
  "swapUSDTForCUSDT(address,uint256,uint256)" \
  $POOL_ADDRESS \
  $AMOUNT_IN \
  $MIN_AMOUNT_OUT \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --gas-price 30000000000 \
  --legacy \
  -vv
```

---

## Oracle and Reporting

### Optional ReserveSystem (oracle-backed mid price)

PMM pool price can be driven by the **ReserveSystem** when base/quote tokens are registered there. This gives reporting and off-chain services an oracle-backed price when available.

1. **Set ReserveSystem** (admin only):
   ```bash
   cast send $DODO_PMM_INTEGRATION_ADDRESS \
     "setReserveSystem(address)" \
     $RESERVE_SYSTEM_ADDRESS \
     --rpc-url $RPC_URL --private-key $PRIVATE_KEY
   ```
   Use `address(0)` to disable and fall back to pool `getMidPrice()` only.

2. **getPoolPriceOrOracle(pool)** returns oracle price from ReserveSystem **`getPrice(base)` / `getPrice(quote)`** (quote per base) when ReserveSystem is set and both feeds are valid; on live Chain 138, wire **`ReserveConversionPriceAdapter`** if the deployed ReserveSystem still has the inverted `getConversionPrice` formula. Otherwise pool **`getMidPrice()`** (DVM mids may be ~$1 — not ETH spot).

3. **DODOPMMProvider** uses `getPoolPriceOrOracle` for quotes, so liquidity provider quotes prefer the oracle when configured.

### Reporting API and pool indexer

The **token-aggregation** service indexes PMM pools for `/report/all`, `/report/coingecko`, and `/report/cross-chain` when **CHAIN_138_DODO_PMM_INTEGRATION** is set.

- Set in token-aggregation `.env`: `CHAIN_138_DODO_PMM_INTEGRATION=<DODOPMMIntegration address>`.
- The pool indexer calls `getAllPools()`, then for each pool `getPoolConfig`, `getPoolReserves`, and `getPoolPriceOrOracle` to compute TVL and persist pools to the DB.
- Ensure the indexer runs for Chain 138 (cron or on-demand) so report endpoints include PMM pools.

See also: [PRICE_FEED_SETUP.md](PRICE_FEED_SETUP.md) for ReserveSystem/OraclePriceFeed setup; [ORACLE_AND_KEEPER_CHAIN138.md](ORACLE_AND_KEEPER_CHAIN138.md) for ORACLE_AGGREGATOR/ORACLE_PROXY and keeper flows on Chain 138.

### PMM price for vault / reporting

**PMMPriceProvider** (`archive/solidity/contracts/vault/adapters/PMMPriceProvider.sol`) exposes `getPrice(asset, quoteToken)` using DODOPMMIntegration’s `getPoolPriceOrOracle`. It is retained as a historical reference implementation for vault collateral valuation and off-chain reporting patterns.

---

## Query Functions

### Get Pool Price (oracle if configured)

```bash
# Prefer oracle when ReserveSystem is set
cast call $DODO_PMM_INTEGRATION_ADDRESS \
  "getPoolPriceOrOracle(address)" \
  $POOL_ADDRESS \
  --rpc-url $RPC_URL

# Pool mid only (no oracle)
cast call $DODO_PMM_INTEGRATION_ADDRESS \
  "getPoolPrice(address)" \
  $POOL_ADDRESS \
  --rpc-url $RPC_URL

# Returns: price in 1e18 format (1000000000000000000 = $1)
```

### Get Pool Reserves

```bash
cast call $DODO_PMM_INTEGRATION_ADDRESS \
  "getPoolReserves(address)" \
  $POOL_ADDRESS \
  --rpc-url $RPC_URL

# Returns: (baseReserve, quoteReserve)
```

### Get Pool Configuration

```bash
cast call $DODO_PMM_INTEGRATION_ADDRESS \
  "getPoolConfig(address)" \
  $POOL_ADDRESS \
  --rpc-url $RPC_URL

# Returns: PoolConfig struct with all parameters
```

### Get All Pools

```bash
cast call $DODO_PMM_INTEGRATION_ADDRESS \
  "getAllPools()" \
  --rpc-url $RPC_URL

# Returns: Array of all pool addresses
```

---

## Pool Parameters Guide

### Initial Price (`i`)

- **Value**: `1000000000000000000` (1e18)
- **Meaning**: $1 for stablecoin pairs
- **Adjustment**: Can set different initial price if needed

### K Factor (`k`)

- **Range**: 0 to 1e18
- **Recommended**: `500000000000000000` (0.5e18 = 50%)
- **Lower k**: Less slippage, more capital intensive
- **Higher k**: More slippage, less capital intensive
- **For stablecoins**: Lower k (0.3-0.5) recommended

### LP Fee Rate

- **Unit**: Basis points (100 = 1%)
- **Recommended**: 3-10 basis points (0.03% - 0.1%)
- **Lower fee**: More attractive for traders
- **Higher fee**: More revenue for LPs

### TWAP Oracle

- **Purpose**: Price discovery and stability
- **Recommended**: Enable for stablecoin pairs
- **Benefit**: Reduces price manipulation

---

## Integration Workflow

### Phase 1: Setup

1. Deploy DODOPMMIntegration contract
2. Create pools (cUSDT/USDT, cUSDC/USDC)
3. Configure pool parameters

### Phase 2: Seed Liquidity

1. Approve tokens to integration contract
2. Add initial liquidity to pools
3. Monitor pool reserves and prices

### Phase 3: Enable Trading

1. Open pools for public trading
2. Monitor swap volumes
3. Adjust parameters if needed

### Phase 4: Maintenance

1. Monitor pool health
2. Add/remove liquidity as needed
3. Update parameters for optimization

---

## Best Practices

1. **Liquidity Depth**: Maintain sufficient liquidity for expected volume
2. **Price Monitoring**: Monitor pool prices vs. 1:1 peg
3. **Arbitrage**: Allow arbitrageurs to maintain peg
4. **Slippage Protection**: Use appropriate slippage tolerances
5. **Gas Optimization**: Use DODO Approve for batch operations
6. **Security**: Audit contracts before mainnet deployment

---

## Troubleshooting

### Pool Creation Fails

- Check DODO Vending Machine address is correct
- Verify token addresses are valid
- Ensure sufficient gas

### Swaps Failing

- Check pool has sufficient liquidity
- Verify slippage tolerance is appropriate
- Check token approvals

### Price Deviation

- Check pool reserves are balanced
- Monitor for large trades
- Consider adding/removing liquidity

---

## Example Setup Script

See `scripts/setup-dodo-pools.sh` for automated pool creation and configuration.

---

## Next Steps

1. Deploy integration contract
2. Create pools with optimal parameters
3. Seed initial liquidity
4. Enable trading
5. Monitor and optimize
