React Integration

This guide shows how to integrate the SatsTerminal Borrow SDK into a React application.

Setup

Install Dependencies

npm install @satsterminal-sdk/borrow

Create SDK Context

// src/contexts/BorrowContext.tsx
import React, { createContext, useContext, useState, useCallback, ReactNode } from 'react';
import { BorrowSDK, ChainType, UserStatus, BorrowSDKConfig } from '@satsterminal-sdk/borrow';

interface BorrowContextType {
  sdk: BorrowSDK | null;
  userStatus: UserStatus | null;
  isInitialized: boolean;
  isLoading: boolean;
  error: string | null;
  initialize: (walletAddress: string, signMessage: (msg: string) => Promise<string>) => Promise<void>;
  disconnect: () => void;
}

const BorrowContext = createContext<BorrowContextType | undefined>(undefined);

interface BorrowProviderProps {
  children: ReactNode;
  apiKey: string;
  baseUrl: string;
  chain?: ChainType;
}

export function BorrowProvider({
  children,
  apiKey,
  baseUrl,
  chain = ChainType.ARBITRUM
}: BorrowProviderProps) {
  const [sdk, setSdk] = useState<BorrowSDK | null>(null);
  const [userStatus, setUserStatus] = useState<UserStatus | null>(null);
  const [isInitialized, setIsInitialized] = useState(false);
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const initialize = useCallback(async (
    walletAddress: string,
    signMessage: (msg: string) => Promise<string>
  ) => {
    setIsLoading(true);
    setError(null);

    try {
      const config: BorrowSDKConfig = {
        apiKey,
        baseUrl,
        chain,
        wallet: {
          address: walletAddress,
          signMessage
        }
      };

      const borrowSdk = new BorrowSDK(config);
      const { userStatus: status } = await borrowSdk.setup();

      setSdk(borrowSdk);
      setUserStatus(status);
      setIsInitialized(true);
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Failed to initialize');
      throw err;
    } finally {
      setIsLoading(false);
    }
  }, [apiKey, baseUrl, chain]);

  const disconnect = useCallback(() => {
    if (sdk) {
      sdk.clearSession();
    }
    setSdk(null);
    setUserStatus(null);
    setIsInitialized(false);
  }, [sdk]);

  return (
    <BorrowContext.Provider
      value={{
        sdk,
        userStatus,
        isInitialized,
        isLoading,
        error,
        initialize,
        disconnect
      }}
    >
      {children}
    </BorrowContext.Provider>
  );
}

export function useBorrowContext() {
  const context = useContext(BorrowContext);
  if (!context) {
    throw new Error('useBorrowContext must be used within BorrowProvider');
  }
  return context;
}

Wrap Your App

// src/App.tsx
import { BorrowProvider } from './contexts/BorrowContext';

function App() {
  return (
    <BorrowProvider
      apiKey={process.env.REACT_APP_API_KEY!}
      baseUrl="https://api.satsterminal.com"
      chain={ChainType.ARBITRUM}
    >
      <YourApp />
    </BorrowProvider>
  );
}

Custom Hooks

useLoan Hook

// src/hooks/useLoan.ts
import { useState, useCallback } from 'react';
import { useBorrowContext } from '../contexts/BorrowContext';
import { WorkflowStatus, DepositInfo, Quote } from '@satsterminal-sdk/borrow';

interface UseLoanOptions {
  collateralBTC: number;
  loanAmountUSD: number;
  ltv?: number;
}

interface UseLoanReturn {
  isLoading: boolean;
  status: WorkflowStatus | null;
  depositInfo: DepositInfo | null;
  quote: Quote | null;
  error: string | null;
  isComplete: boolean;
  startLoan: () => Promise<void>;
  stopTracking: () => void;
}

export function useLoan(options: UseLoanOptions): UseLoanReturn {
  const { sdk } = useBorrowContext();
  const [isLoading, setIsLoading] = useState(false);
  const [status, setStatus] = useState<WorkflowStatus | null>(null);
  const [depositInfo, setDepositInfo] = useState<DepositInfo | null>(null);
  const [quote, setQuote] = useState<Quote | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [isComplete, setIsComplete] = useState(false);
  const [stopFn, setStopFn] = useState<(() => void) | null>(null);

  const startLoan = useCallback(async () => {
    if (!sdk) {
      setError('SDK not initialized');
      return;
    }

    setIsLoading(true);
    setError(null);
    setIsComplete(false);
    setStatus(null);
    setDepositInfo(null);

    try {
      const result = await sdk.getLoan({
        collateralBTC: options.collateralBTC,
        loanAmountUSD: options.loanAmountUSD,
        ltv: options.ltv || 70,
        onStatusUpdate: setStatus,
        onDepositReady: setDepositInfo,
        onComplete: () => {
          setIsComplete(true);
          setIsLoading(false);
        },
        onError: (err) => {
          setError(err);
          setIsLoading(false);
        }
      });

      setQuote(result.quote);
      setStopFn(() => result.stop);
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Failed to start loan');
      setIsLoading(false);
    }
  }, [sdk, options]);

  const stopTracking = useCallback(() => {
    if (stopFn) {
      stopFn();
    }
  }, [stopFn]);

  return {
    isLoading,
    status,
    depositInfo,
    quote,
    error,
    isComplete,
    startLoan,
    stopTracking
  };
}

usePositions Hook

// src/hooks/usePositions.ts
import { useState, useEffect, useCallback } from 'react';
import { useBorrowContext } from '../contexts/BorrowContext';
import { WalletPosition } from '@satsterminal-sdk/borrow';

export function usePositions(refreshInterval = 30000) {
  const { sdk, isInitialized } = useBorrowContext();
  const [positions, setPositions] = useState<WalletPosition[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);

  const fetchPositions = useCallback(async () => {
    if (!sdk || !isInitialized) return;

    setIsLoading(true);
    try {
      const response = await sdk.getWalletPositions({
        filterTrash: 'only_non_trash'
      });
      setPositions(response.data);
      setError(null);
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Failed to fetch positions');
    } finally {
      setIsLoading(false);
    }
  }, [sdk, isInitialized]);

  useEffect(() => {
    fetchPositions();

    const interval = setInterval(fetchPositions, refreshInterval);
    return () => clearInterval(interval);
  }, [fetchPositions, refreshInterval]);

  return { positions, isLoading, error, refresh: fetchPositions };
}

useLoanHistory Hook

// src/hooks/useLoanHistory.ts
import { useState, useEffect, useCallback } from 'react';
import { useBorrowContext } from '../contexts/BorrowContext';
import { UserTransaction } from '@satsterminal-sdk/borrow';

export function useLoanHistory(status: 'active' | 'pending' | 'all' = 'all') {
  const { sdk, isInitialized } = useBorrowContext();
  const [loans, setLoans] = useState<UserTransaction[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [page, setPage] = useState(1);
  const [hasMore, setHasMore] = useState(true);

  const fetchLoans = useCallback(async (pageNum: number) => {
    if (!sdk || !isInitialized) return;

    setIsLoading(true);
    try {
      const response = await sdk.getLoanHistory({
        page: pageNum,
        limit: 10,
        status
      });

      if (pageNum === 1) {
        setLoans(response.transactions);
      } else {
        setLoans(prev => [...prev, ...response.transactions]);
      }

      setHasMore(response.pagination.hasNext);
      setError(null);
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Failed to fetch loans');
    } finally {
      setIsLoading(false);
    }
  }, [sdk, isInitialized, status]);

  useEffect(() => {
    setPage(1);
    fetchLoans(1);
  }, [fetchLoans]);

  const loadMore = useCallback(() => {
    if (!isLoading && hasMore) {
      const nextPage = page + 1;
      setPage(nextPage);
      fetchLoans(nextPage);
    }
  }, [isLoading, hasMore, page, fetchLoans]);

  return { loans, isLoading, error, hasMore, loadMore };
}

Components

LoanForm Component

// src/components/LoanForm.tsx
import React, { useState } from 'react';
import { useLoan } from '../hooks/useLoan';

export function LoanForm() {
  const [collateralBTC, setCollateralBTC] = useState(0.1);
  const [loanAmountUSD, setLoanAmountUSD] = useState(5000);

  const {
    isLoading,
    status,
    depositInfo,
    quote,
    error,
    isComplete,
    startLoan
  } = useLoan({ collateralBTC, loanAmountUSD });

  return (
    <div className="loan-form">
      <h2>Get a Loan</h2>

      {!isLoading && !status && (
        <form onSubmit={(e) => { e.preventDefault(); startLoan(); }}>
          <div>
            <label>Collateral (BTC)</label>
            <input
              type="number"
              step="0.001"
              value={collateralBTC}
              onChange={(e) => setCollateralBTC(parseFloat(e.target.value))}
            />
          </div>

          <div>
            <label>Loan Amount (USD)</label>
            <input
              type="number"
              value={loanAmountUSD}
              onChange={(e) => setLoanAmountUSD(parseFloat(e.target.value))}
            />
          </div>

          <button type="submit">Get Loan</button>
        </form>
      )}

      {status && (
        <div className="status">
          <h3>Status: {status.label}</h3>
          <p>{status.description}</p>
          <progress value={status.step} max={8} />
        </div>
      )}

      {depositInfo && !isComplete && (
        <div className="deposit-info">
          <h3>Deposit Required</h3>
          <p>Amount: {depositInfo.amountBTC} BTC</p>
          <code>{depositInfo.address}</code>
        </div>
      )}

      {quote && (
        <div className="quote-info">
          <h4>Quote Details</h4>
          <p>Protocol: {quote.protocol}</p>
          <p>APY: {quote.borrowApy.variable}%</p>
        </div>
      )}

      {isComplete && (
        <div className="success">
          <h3>Loan Complete!</h3>
          <p>Your funds are now available in your smart account.</p>
        </div>
      )}

      {error && (
        <div className="error">
          <p>Error: {error}</p>
        </div>
      )}
    </div>
  );
}

PositionsList Component

// src/components/PositionsList.tsx
import React from 'react';
import { usePositions } from '../hooks/usePositions';

export function PositionsList() {
  const { positions, isLoading, error, refresh } = usePositions();

  if (isLoading && positions.length === 0) {
    return <div>Loading positions...</div>;
  }

  if (error) {
    return <div>Error: {error}</div>;
  }

  const totalValue = positions.reduce(
    (sum, p) => sum + (p.attributes.value || 0),
    0
  );

  return (
    <div className="positions">
      <div className="header">
        <h2>Wallet Positions</h2>
        <button onClick={refresh}>Refresh</button>
      </div>

      <div className="total">
        Total Value: ${totalValue.toFixed(2)}
      </div>

      <table>
        <thead>
          <tr>
            <th>Token</th>
            <th>Amount</th>
            <th>Value</th>
            <th>24h</th>
          </tr>
        </thead>
        <tbody>
          {positions.map((position) => (
            <tr key={position.id}>
              <td>{position.attributes.fungible_info?.symbol || 'Unknown'}</td>
              <td>{position.attributes.quantity.float.toFixed(4)}</td>
              <td>${(position.attributes.value || 0).toFixed(2)}</td>
              <td className={
                (position.attributes.changes?.percent_1d || 0) >= 0
                  ? 'positive'
                  : 'negative'
              }>
                {position.attributes.changes?.percent_1d?.toFixed(2) || 0}%
              </td>
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}

ConnectWallet Component

// src/components/ConnectWallet.tsx
import React from 'react';
import { useBorrowContext } from '../contexts/BorrowContext';

export function ConnectWallet() {
  const { isInitialized, isLoading, error, initialize, disconnect, userStatus } = useBorrowContext();

  const handleConnect = async () => {
    // Example with a Bitcoin wallet library
    // Replace with your actual wallet integration
    const wallet = await connectBitcoinWallet();

    await initialize(
      wallet.address,
      (message) => wallet.signMessage(message)
    );
  };

  if (isInitialized) {
    return (
      <div className="wallet-info">
        <p>Connected: {userStatus?.btcAddress?.slice(0, 10)}...</p>
        <p>Smart Account: {userStatus?.smartAccountAddress?.slice(0, 10)}...</p>
        <button onClick={disconnect}>Disconnect</button>
      </div>
    );
  }

  return (
    <div className="connect-wallet">
      <button onClick={handleConnect} disabled={isLoading}>
        {isLoading ? 'Connecting...' : 'Connect Wallet'}
      </button>
      {error && <p className="error">{error}</p>}
    </div>
  );
}

Full Example App

// src/App.tsx
import React from 'react';
import { BorrowProvider } from './contexts/BorrowContext';
import { ConnectWallet } from './components/ConnectWallet';
import { LoanForm } from './components/LoanForm';
import { PositionsList } from './components/PositionsList';
import { useBorrowContext } from './contexts/BorrowContext';
import { ChainType } from '@satsterminal-sdk/borrow';

function Dashboard() {
  const { isInitialized } = useBorrowContext();

  if (!isInitialized) {
    return (
      <div className="app">
        <h1>SatsTerminal Borrow</h1>
        <ConnectWallet />
      </div>
    );
  }

  return (
    <div className="app">
      <header>
        <h1>SatsTerminal Borrow</h1>
        <ConnectWallet />
      </header>

      <main>
        <section>
          <LoanForm />
        </section>

        <section>
          <PositionsList />
        </section>
      </main>
    </div>
  );
}

export default function App() {
  return (
    <BorrowProvider
      apiKey={process.env.REACT_APP_SATSTERMINAL_API_KEY!}
      baseUrl="https://api.satsterminal.com"
      chain={ChainType.ARBITRUM}
    >
      <Dashboard />
    </BorrowProvider>
  );
}

Best Practices

1. Error Boundaries

class BorrowErrorBoundary extends React.Component<
  { children: ReactNode },
  { hasError: boolean; error: Error | null }
> {
  state = { hasError: false, error: null };

  static getDerivedStateFromError(error: Error) {
    return { hasError: true, error };
  }

  render() {
    if (this.state.hasError) {
      return (
        <div className="error-boundary">
          <h2>Something went wrong</h2>
          <p>{this.state.error?.message}</p>
          <button onClick={() => this.setState({ hasError: false })}>
            Try Again
          </button>
        </div>
      );
    }

    return this.props.children;
  }
}

2. Loading States

function LoadingSpinner() {
  return <div className="spinner">Loading...</div>;
}

function withLoading<P extends object>(
  Component: React.ComponentType<P>,
  useLoadingHook: () => boolean
) {
  return function WithLoadingComponent(props: P) {
    const isLoading = useLoadingHook();

    if (isLoading) {
      return <LoadingSpinner />;
    }

    return <Component {...props} />;
  };
}

3. Optimistic Updates

function useLoanWithOptimisticUpdate() {
  const [optimisticLoans, setOptimisticLoans] = useState<UserTransaction[]>([]);

  const startLoan = async (options: LoanOptions) => {
    // Add optimistic loan
    const optimisticLoan: UserTransaction = {
      id: 'temp-' + Date.now(),
      type: 'borrow',
      status: 'pending',
      amount: options.loanAmountUSD.toString(),
      currency: 'USD',
      timestamp: Date.now()
    };

    setOptimisticLoans(prev => [optimisticLoan, ...prev]);

    try {
      await sdk.getLoan(options);
      // Refresh real data
      await refreshLoans();
    } finally {
      // Remove optimistic loan
      setOptimisticLoans(prev =>
        prev.filter(l => l.id !== optimisticLoan.id)
      );
    }
  };

  return { optimisticLoans, startLoan };
}

Overview

Suite

Swaps

Borrow

React integration

React Integration

Setup

Install Dependencies

Create SDK Context

Wrap Your App

Custom Hooks

useLoan Hook

usePositions Hook

useLoanHistory Hook

Components

LoanForm Component

PositionsList Component

ConnectWallet Component

Full Example App

Best Practices

1. Error Boundaries

2. Loading States

3. Optimistic Updates

Overview

Suite

Swaps

Borrow

​React Integration

​Setup

​Install Dependencies

​Create SDK Context

​Wrap Your App

​Custom Hooks

​useLoan Hook

​usePositions Hook

​useLoanHistory Hook

​Components

​LoanForm Component

​PositionsList Component

​ConnectWallet Component

​Full Example App

​Best Practices

​1. Error Boundaries

​2. Loading States

​3. Optimistic Updates

React Integration

Setup

Install Dependencies

Create SDK Context

Wrap Your App

Custom Hooks

useLoan Hook

usePositions Hook

useLoanHistory Hook

Components

LoanForm Component

PositionsList Component

ConnectWallet Component

Full Example App

Best Practices

1. Error Boundaries

2. Loading States

3. Optimistic Updates