ListBalances - Query All Token Balances

interface PortfolioToken {
  coinType: string;
  symbol: string;
  balance: string;
  balanceFormatted: string;
  lockedBalance: string;
  iconUrl?: string;
  usdValue?: number;
}

async function getPortfolio(owner: string): Promise<PortfolioToken[]> {
  const balancesResponse = await listBalances(owner);

  // Enrich with coin metadata
  const enrichedBalances = await Promise.all(
    balancesResponse.balances.map(async (balance: any) => {
      try {
        const coinInfo = await getCoinInfo(balance.coin_type);

        const balanceNum = Number(balance.balance) / Math.pow(10, coinInfo.decimals);

        return {
          coinType: balance.coin_type,
          symbol: coinInfo.symbol,
          balance: balance.balance,
          balanceFormatted: balanceNum.toFixed(coinInfo.decimals),
          lockedBalance: balance.locked_balance.toString(),
          iconUrl: coinInfo.icon_url
        };
      } catch (error) {
        console.warn(`Failed to get info for ${balance.coin_type}`);
        return {
          coinType: balance.coin_type,
          symbol: 'UNKNOWN',
          balance: balance.balance,
          balanceFormatted: balance.balance,
          lockedBalance: balance.locked_balance.toString()
        };
      }
    })
  );

  // Filter out zero balances
  return enrichedBalances.filter(
    token => Number(token.balance) > 0 || Number(token.lockedBalance) > 0
  );
}

// Usage
const portfolio = await getPortfolio(userAddress);

console.log('Portfolio:');
portfolio.forEach(token => {
  console.log(`${token.symbol}: ${token.balanceFormatted}`);
  if (Number(token.lockedBalance) > 0) {
    console.log(`  (${token.lockedBalance} locked)`);
  }
});

interface TransferValidation {
  canTransfer: boolean;
  availableBalance: bigint;
  reason?: string;
}

async function validateMultiTokenTransfer(
  owner: string,
  transfers: Array<{ coinType: string; amount: bigint }>
): Promise<Map<string, TransferValidation>> {
  const balances = await listBalances(owner);
  const balanceMap = new Map(
    balances.balances.map((b: any) => [b.coin_type, BigInt(b.balance)])
  );

  const validations = new Map<string, TransferValidation>();

  for (const transfer of transfers) {
    const available = balanceMap.get(transfer.coinType) || 0n;

    if (available >= transfer.amount) {
      validations.set(transfer.coinType, {
        canTransfer: true,
        availableBalance: available
      });
    } else {
      validations.set(transfer.coinType, {
        canTransfer: false,
        availableBalance: available,
        reason: `Insufficient balance: need ${transfer.amount}, have ${available}`
      });
    }
  }

  return validations;
}

// Usage
const transfers = [
  { coinType: '0x2::sui::SUI', amount: 5_000_000_000n },  // 5 SUI
  { coinType: 'USDC_TYPE', amount: 100_000_000n }  // 100 USDC
];

const validations = await validateMultiTokenTransfer(userAddress, transfers);

for (const [coinType, validation] of validations) {
  if (!validation.canTransfer) {
    console.error(`Cannot transfer ${coinType}: ${validation.reason}`);
  }
}

interface PortfolioValue {
  tokens: Array<{
    coinType: string;
    symbol: string;
    balance: string;
    usdValue: number;
  }>;
  totalUsdValue: number;
}

async function calculatePortfolioValue(
  owner: string,
  priceOracle: (coinType: string) => Promise<number>
): Promise<PortfolioValue> {
  const balances = await listBalances(owner);

  const tokensWithValue = await Promise.all(
    balances.balances.map(async (balance: any) => {
      const coinInfo = await getCoinInfo(balance.coin_type);
      const price = await priceOracle(balance.coin_type).catch(() => 0);

      const balanceNum = Number(balance.balance) / Math.pow(10, coinInfo.decimals);
      const usdValue = balanceNum * price;

      return {
        coinType: balance.coin_type,
        symbol: coinInfo.symbol,
        balance: balanceNum.toFixed(coinInfo.decimals),
        usdValue
      };
    })
  );

  const totalUsdValue = tokensWithValue.reduce(
    (sum, token) => sum + token.usdValue,
    0
  );

  return {
    tokens: tokensWithValue,
    totalUsdValue
  };
}

// Usage
const portfolio = await calculatePortfolioValue(
  userAddress,
  async (coinType) => {
    // Fetch price from your preferred oracle
    return fetchPrice(coinType);
  }
);

console.log(`Total Portfolio Value: $${portfolio.totalUsdValue.toFixed(2)}`);
portfolio.tokens.forEach(token => {
  console.log(`${token.symbol}: ${token.balance} ($${token.usdValue.toFixed(2)})`);
});

class BalanceMonitor {
  private previousBalances = new Map<string, string>();

  async checkForChanges(owner: string): Promise<Array<{
    coinType: string;
    previousBalance: string;
    currentBalance: string;
    change: string;
  }>> {
    const current = await listBalances(owner);
    const changes: any[] = [];

    for (const balance of current.balances) {
      const previous = this.previousBalances.get(balance.coin_type);

      if (previous && previous !== balance.balance) {
        changes.push({
          coinType: balance.coin_type,
          previousBalance: previous,
          currentBalance: balance.balance,
          change: (BigInt(balance.balance) - BigInt(previous)).toString()
        });
      }

      this.previousBalances.set(balance.coin_type, balance.balance);
    }

    return changes;
  }
}

// Usage
const monitor = new BalanceMonitor();

// Poll for changes
setInterval(async () => {
  const changes = await monitor.checkForChanges(userAddress);

  if (changes.length > 0) {
    console.log('Balance changes detected:');
    changes.forEach(change => {
      const isPositive = BigInt(change.change) > 0n;
      const direction = isPositive ? '+' : '';
      console.log(`${change.coinType}: ${direction}${change.change}`);
    });
  }
}, 10000);  // Check every 10 seconds

async function discoverNewTokens(
  owner: string,
  knownTokens: Set<string>
): Promise<string[]> {
  const balances = await listBalances(owner);

  const newTokens = balances.balances
    .map((b: any) => b.coin_type)
    .filter(coinType => !knownTokens.has(coinType));

  if (newTokens.length > 0) {
    console.log(`Discovered ${newTokens.length} new tokens`);

    for (const coinType of newTokens) {
      try {
        const info = await getCoinInfo(coinType);
        console.log(`  - ${info.symbol} (${info.name})`);
        knownTokens.add(coinType);
      } catch (error) {
        console.warn(`  - Unknown token: ${coinType}`);
      }
    }
  }

  return newTokens;
}

class BalanceCache {
  private cache = new Map<string, { data: any; timestamp: number }>();
  private ttl = 5000; // 5 seconds

  async getBalances(owner: string): Promise<any> {
    const cached = this.cache.get(owner);

    if (cached && Date.now() - cached.timestamp < this.ttl) {
      return cached.data;
    }

    const balances = await listBalances(owner);

    this.cache.set(owner, {
      data: balances,
      timestamp: Date.now()
    });

    return balances;
  }

  invalidate(owner: string): void {
    this.cache.delete(owner);
  }
}

// Usage
const cache = new BalanceCache();

// Initial fetch
const balances1 = await cache.getBalances(owner);  // Network request

// Subsequent fetches within TTL
const balances2 = await cache.getBalances(owner);  // Cached

// After transaction, invalidate
await executeTransaction(tx);
cache.invalidate(owner);

async function listBalancesWithFallback(owner: string): Promise<any[]> {
  const balances = await listBalances(owner);

  return Promise.all(
    balances.balances.map(async (balance: any) => {
      try {
        const info = await getCoinInfo(balance.coin_type);
        return {
          ...balance,
          symbol: info.symbol,
          decimals: info.decimals,
          name: info.name
        };
      } catch (error) {
        // Fallback for unknown tokens
        return {
          ...balance,
          symbol: balance.coin_type.split('::').pop() || 'UNKNOWN',
          decimals: 9,  // Assume standard decimals
          name: 'Unknown Token'
        };
      }
    })
  );
}