> ## Documentation Index
> Fetch the complete documentation index at: https://docs.powfi.alephium.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Provide CPMM liquidity

> Create a pair, add balanced liquidity, track your share, and withdraw.

export const VersionBanner = ({network = 'mainnet', products = [], lang = 'en'}) => {
  const SDK_VERSION = '1.0.2';
  const ADDRESSES = {
    mainnet: {
      cpmm: {
        Router: 'ze15rnAwTyVCPnDhN7J8An3SvNeWBsZHAVMeBx1ehXeP',
        TokenPairFactory: '24CXRLvj1QiDH6riwr1EPERG7BcduHKZtktygbq97MfYb'
      },
      clmm: {
        PoolFactory: '24gqd4DMQXVzjm5QDAGxUtYupx3WM2PSu3vZUseuBCV9h',
        PositionManager: 'vFyKSqnJHS9MicrojBcLgztyRFqhS4hB349Ci3LJCELw'
      },
      staking: {
        XAlphToken: '225WevmFp5ZgzPsyVJTvyp2v2uyKrvp329HfrVmzffnWj',
        RewardFeeCollector: '22CE7vG6u64zjjsLZLxeJqQuPDydjPvbP9iG1d861j2G7'
      }
    },
    testnet: {
      cpmm: {
        Router: 'xaueT8kPMvpnaFJEfHv6CJLgqsSPpoNmHjF1QgTxoF9R',
        TokenPairFactory: '29hdd9b9Gp7oXuamwHKfUqBaRXP487HoeTcutS3RhZJEj'
      },
      clmm: {
        PoolFactory: 'z2QFT7qBQrfm8UwAYG3VHWoHs7B56ZDFNdSCcDu5j53m',
        PositionManager: '21p6egW8d6FEyVVuH17WqvHCARsCsD61GcBmeCr75XdGT'
      },
      staking: {
        XAlphToken: '23psDicimC5VdpM56wrgqgCzQzcyXWGCkQGSYWbtZAPRq',
        RewardFeeCollector: '29qQ1LPJ5uqawRviXLVDMeo19JUygRrNNTQy5RUBh817D'
      }
    }
  };
  const EXPLORERS = {
    mainnet: 'https://explorer.alephium.org/addresses/',
    testnet: 'https://testnet.alephium.org/addresses/'
  };
  const LABELS = {
    en: {
      sdk: 'SDK',
      network: 'Network',
      contracts: 'Contracts',
      all: 'All addresses',
      allNetworks: 'mainnet · testnet · devnet',
      devnet: 'Local deployment (addresses vary per devnet)'
    },
    zh: {
      sdk: 'SDK 版本',
      network: '网络',
      contracts: '合约',
      all: '全部地址',
      allNetworks: 'mainnet · testnet · devnet',
      devnet: '本地部署（每个 devnet 的地址不同）'
    },
    fr: {
      sdk: 'SDK',
      network: 'Réseau',
      contracts: 'Contrats',
      all: 'Toutes les adresses',
      allNetworks: 'mainnet · testnet · devnet',
      devnet: 'Déploiement local (adresses propres à chaque devnet)'
    }
  };
  const t = LABELS[lang] ?? LABELS.en;
  const contractsPage = lang === 'en' ? '/reference/contracts' : `/${lang}/reference/contracts`;
  const short = a => `${a.slice(0, 6)}…${a.slice(-4)}`;
  const entries = [];
  const addrs = ADDRESSES[network];
  if (addrs) {
    for (const p of products) {
      for (const [name, address] of Object.entries(addrs[p] ?? ({}))) entries.push({
        name,
        address
      });
    }
  }
  let contractsCell;
  if (network === 'devnet' && products.length > 0) {
    contractsCell = <span>{t.devnet}</span>;
  } else if (entries.length > 0) {
    contractsCell = entries.map(({name, address}, i) => <span key={name}>
        {i > 0 && <span className="mx-1 opacity-50">·</span>}
        {name}{' '}
        <a href={EXPLORERS[network] + address} target="_blank" rel="noreferrer" title={address}>
          <code>{short(address)}</code>
        </a>
      </span>);
  }
  const row = (label, value) => <div className="flex flex-wrap gap-x-2">
      <span className="font-semibold min-w-[5.5rem]">{label}</span>
      <span className="flex-1 min-w-0 break-words">{value}</span>
    </div>;
  return <div className="not-prose mb-6 rounded-xl border border-zinc-950/10 dark:border-white/10 bg-zinc-50 dark:bg-white/5 px-4 py-3 text-sm leading-6 text-zinc-700 dark:text-zinc-300">
      {row(t.sdk, <code>@alephium/powfi-sdk@{SDK_VERSION}</code>)}
      {row(t.network, network === 'all' ? t.allNetworks : network)}
      {contractsCell && row(t.contracts, <span>
            {contractsCell}
            <span className="mx-1 opacity-50">·</span>
            <a href={contractsPage}>{t.all} →</a>
          </span>)}
    </div>;
};

<VersionBanner network="mainnet" products={['cpmm']} lang="en" />

## Create a pool with initial liquidity

The first deposit sets the price. For example, depositing 1,000 ALPH and 50 USDT sets 1 ALPH = 0.05 USDT.

```ts theme={null}
const exists = await powfi.cpmm.poolExists(alph, usdt)

if (!exists) {
  // preview: LP minted = sqrt(a*b) - 1000
  const preview = CpmmModule.computeLiquidityAmounts({
    tokenAId: alph,
    tokenBId: usdt,
    amountA: 1_000n * 10n ** 18n,
    amountB: 50n * 10n ** 6n
  })

  const { poolId, result } = await powfi.cpmm.createPool({
    tokenAId: alph,
    tokenBId: usdt,
    sender: address,
    initialLiquidity: { tokenAAmount: preview.amountA, tokenBAmount: preview.amountB }
  })
}
```

Creating a pair costs a 1 ALPH contract deposit.

## Add liquidity to an existing pool

Let the user type one side, and derive the other side from the reserves:

```ts theme={null}
const pool = await powfi.cpmm.getPoolState(alph, usdt)

const q = CpmmModule.computeLiquidityAmounts({
  poolState: pool,
  tokenAId: alph,
  tokenBId: usdt,
  amountA: 200n * 10n ** 18n,
  inputType: 'TokenA'
})
// q.amountB     -> USDT needed
// q.shareAmount -> LP tokens you'll receive
// q.sharePercentage -> your % of the pool after deposit

await powfi.cpmm.addLiquidity({
  poolState: pool,
  tokenAId: alph,
  tokenBId: usdt,
  amountA: q.amountA,
  amountB: q.amountB,
  slippageBps: 50n,
  sender: address
})
```

## Read a position

LP tokens are a regular fungible token whose ID is the pool ID:

```ts theme={null}
const lpTokenId = powfi.cpmm.getPoolId(alph, usdt)
const bal = await powfi.nodeProvider.addresses.getAddressesAddressBalance(address)
const lpBalance = BigInt(bal.tokenBalances?.find((t) => t.id === lpTokenId)?.amount ?? '0')

const { token0, amount0, token1, amount1 } = await powfi.cpmm.computeClaimableAmounts(alph, usdt, lpBalance)
```

## Remove liquidity

```ts theme={null}
const pool = await powfi.cpmm.getPoolState(alph, usdt)
const burn = lpBalance / 2n // withdraw 50%

const preview = CpmmModule.computeRemoveLiquidityAmounts(pool, lpBalance, burn)
// preview.amount0 / amount1 -> tokens you receive
// preview.remainSharePercentage

await powfi.cpmm.removeLiquidity({
  poolState: pool,
  liquidity: burn,
  totalLiquidityAmount: lpBalance,
  slippageBps: 50n,
  sender: address
})
```


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