Transaction Hooks

Transaction Pattern

// 1. Transaction hook
const { approveAndExecute, signAndExecute, isLoading } = useXTransaction({ ... });

// 2. Named callback with useCallback
const handleExecute = useCallback(() => {
  if (!isApproved) {
    void approveAndExecute();
  } else {
    void signAndExecute();
  }
}, [isApproved, approveAndExecute, signAndExecute]);

// 3. ExecuteTransactionButton (handles connection/chain switching)
<ExecuteTransactionButton
  targetChainId={chainId}
 
  isLoading={isLoading}
  disabled={!amount}
>
  Execute
</ExecuteTransactionButton>

Transaction Tracking & Process Modal

Multi-step transactions use useTransactionTracking + GlobalTransactionModals for persistent progress UI.

Architecture:

useTransactionTracking (hook)
    ↓ writes to
useTransactionProcessStore (Zustand)
    ↓ watched by
GlobalTransactionModals (renders ProcessModal)
    ↓ background txs shown in
TransactionIndicator (navbar indicator)

Usage in transaction hooks:

import { useTransactionTracking } from '@/hooks/useTransactionTracking';

export function useSupplyTransaction(market: Market, onSuccess?: () => void) {
  const tracking = useTransactionTracking('supply');

  const steps = [
    { id: 'approve', title: 'Approve Token', description: 'Approving...' },
    { id: 'signing', title: 'Sign Message', description: 'Sign in wallet' },
    { id: 'supplying', title: 'Confirm Supply', description: 'Confirm tx' },
  ];

  const execute = async () => {
    // Start tracking - modal appears automatically
    tracking.start(steps, {
      title: `Supply ${market.loanAsset.symbol}`,        // Required
      description: `Supplying to market`,                // Optional
      tokenSymbol: market.loanAsset.symbol,              // Optional metadata
    }, 'approve');

    try {
      await doApproval();
      tracking.update('signing');     // Move to next step

      await doSign();
      tracking.update('supplying');

      await doSupply();
      tracking.complete();            // Removes from store, modal closes
      onSuccess?.();
    } catch (error) {
      tracking.fail();                // Removes from store
      throw error;
    }
  };

  return { execute, transaction: tracking.transaction };
}

Key methods:

• start(steps, metadata, initialStep) - Begin tracking, modal shows
• update(stepId) - Move to next step
• complete() / fail() - End tracking, remove from store
• dismiss() - Hide modal, tx continues in background (shows in indicator)

No component-level ProcessModal needed. GlobalTransactionModals (in layout) automatically renders modals for all visible transactions. When user dismisses, tx appears in TransactionIndicator. Clicking indicator restores the modal.

useTransactionWithToast

Wraps wagmi's useSendTransaction with automatic toast notifications for pending, success, and error states.

Usage:

import { useTransactionWithToast } from '@/hooks/useTransactionWithToast';

const { isConfirming, sendTransactionAsync } = useTransactionWithToast({
  toastId: 'supply',
  pendingText: `Supplying ${formatBalance(amount, decimals)} ${symbol}`,
  successText: `${symbol} Supplied`,
  errorText: 'Failed to supply',
  chainId,
  pendingDescription: `Supplying to market ${marketId.slice(2, 8)}...`,
  successDescription: `Successfully supplied to market ${marketId.slice(2, 8)}`,
  onSuccess,
});

// Execute transaction
await sendTransactionAsync({
  account,
  to: contractAddress,
  data: encodedData,
  value: ethValue,
  gas: gasLimit,  // Optional: override gas estimation
});

Returns:

• sendTransactionAsync - Async function to send transaction
• sendTransaction - Sync mutation function
• isConfirming - Boolean, true while waiting for confirmation
• isConfirmed - Boolean, true when transaction confirmed

Combined with useTransactionTracking:

For multi-step flows (approve → sign → execute), use both hooks together:

• useTransactionTracking - Shows step-by-step progress modal
• useTransactionWithToast - Handles the actual transaction toast notifications

const tracking = useTransactionTracking('supply');
const { sendTransactionAsync, isConfirming } = useTransactionWithToast({ ... });

const execute = async () => {
  tracking.start(steps, metadata, 'approve');

  await doApproval();
  tracking.update('supplying');

  await sendTransactionAsync({ ... });  // Toast appears automatically
  tracking.complete();
};