Programmable Transaction Blocks Builder (PTB Builder)

PTB Builder is a graphical toolkit for building, simulating, and executing Programmable Transaction Blocks (PTBs) on the Sui blockchain. It provides an intuitive drag‑and‑drop interface, automatic code generation, and on‑chain execution support — bridging the gap between developers and non‑developers.

Demo

• https://ptb.wal.app/

Features

1. Transaction Construction and Pre‑Testing

• Visual Editor: Construct PTBs via a drag‑and‑drop UI (React Flow-based).
• Code Generation: Automatically generate clean TypeScript for the Sui TS SDK.
• Simulation: Dry‑run PTBs before execution to validate behavior.

2. Execute Transactions Without Coding

• Accessible: Non‑developers can create and run PTBs without writing code.
• Real‑Time Feedback: Errors/warnings surface instantly during graph construction.

3. Save and Share

• Graph Persistence: Save PTB graphs locally and reload them later.
• Collaboration: Share saved graphs with teammates or the community.
• Optional Export: Expose an Export .ptb button from the UI (hidden by default).

4. Visualization and Debugging

• Execution Visualization: Visualize executed PTBs as readable graphs.
• Debugging Tools: Trace execution, inspect inputs/outputs, and fix issues.

5. On‑Chain Transaction Loading

• Load from Digest: Import an on‑chain transaction by digest and visualize its structure.

6. Use On‑Chain Assets as Objects

• Asset Browser: Browse objects owned by your address (coins, Move objects, modules, etc.).
• One‑Click Insert: Insert an object as an Object node in one click.
• Seamless Integration: Use assets directly in commands like TransferObjects, MergeCoins, MoveCall.

7. Themes

• Initial Theme Selection: dark, light, cobalt2, tokyo night, cream, mint.breeze.
• Switch Anytime: Change themes dynamically from the workspace.

Supported Commands

The following PTB commands are currently supported:

• SplitCoins — split a coin object into multiple parts.
• MergeCoins — merge multiple coins into one.
• TransferObjects — transfer owned objects to a recipient.
• MoveCall — call any Move function from an on‑chain package.
• MakeMoveVec — create vectors from scalar values.

(Additional commands can be added via registry extensions.)

Supported Inputs

Inputs follow tx.option conventions from the Sui TS SDK:

• Scalars: numbers, booleans, addresses, strings ✅
• Objects: direct ownership/transfer supported ✅ (includes Coin<T>)
  • Objects can also be selected from your owned assets via the Assets modal.
• Vectors: scalars only ✅ (❌ objects, including coins, are not supported in vectors)
• Options: available for scalars ✅ (❌ not supported for objects)

Quick Start (dApp Integration)

Below snippets mirror a typical setup using @mysten/dapp‑kit with PTB Builder.

App.tsx

import { PTBBuilder, Chain, ToastVariant } from '@zktx.io/ptb-builder';
import { Transaction } from '@mysten/sui/transactions';
import { useCurrentAccount, useSignAndExecuteTransaction } from '@mysten/dapp-kit';
import { enqueueSnackbar } from 'notistack';

function App() {
  const account = useCurrentAccount();
  const { mutate: signAndExecuteTransaction } = useSignAndExecuteTransaction();

  // Toast adapter
  const handleToast = ({ message, variant }: { message: string; variant?: ToastVariant }) => {
    enqueueSnackbar(message, { variant });
  };

  // Execute adapter
  const executeTx = async (
    chain: Chain,
    transaction: Transaction | undefined,
  ): Promise<{ digest?: string; error?: string }> => {
    if (!account || !transaction) return { error: 'No account or transaction' };
    try {
      const jsonTx = await transaction.toJSON();
      return new Promise((resolve) => {
        signAndExecuteTransaction(
          { transaction: jsonTx, chain },
          {
            onSuccess: (result) => resolve({ digest: result.digest }),
            onError: (error) => resolve({ error: error.message }),
          },
        );
      });
    } catch (e: any) {
      return { error: e.message || 'Serialization failed' };
    }
  };

  return (
    <PTBBuilder
      toast={handleToast}
      executeTx={executeTx}
      address={account?.address}
      showExportButton
    />
  );
}

export default App;

pages/editor.tsx

import { useCurrentAccount, useSuiClientContext } from '@mysten/dapp-kit';
import { PTB_VERSION, PTBDoc, usePTB } from '@zktx.io/ptb-builder';
import { DragAndDrop } from '../components/DragAndDrop';

type SuiNetwork = 'mainnet' | 'testnet' | 'devnet';
type SuiChain = `sui:${SuiNetwork}`;

export const Editor = () => {
  const { network, selectNetwork } = useSuiClientContext();
  const account = useCurrentAccount();
  const { loadFromDoc } = usePTB();

  // Safe parser for "sui:<network>"
  const parseNetwork = (chain?: string): SuiNetwork | undefined => {
    const m = chain?.match(/^sui:(mainnet|testnet|devnet)$/);
    return m?.[1] as SuiNetwork | undefined;
  };

  const handleDrop = (file: PTBDoc) => {
    // Align dapp-kit network only if valid and different
    const target = parseNetwork(file.chain);
    if (target && target !== network) selectNetwork(target);
    loadFromDoc(file);
  };

  const handleChancel = () => {
    // Reset with a current network
    loadFromDoc(`sui:${network}` as SuiChain);
  };

  return (
    <div style={{ width: '100vw', height: '100vh' }}>
      {account && <DragAndDrop onDrop={handleDrop} onChancel={handleChancel} />}
    </div>
  );
};

pages/viewer.tsx

import { useEffect, useRef, useState } from 'react';
import { usePTB } from '@zktx.io/ptb-builder';
import queryString from 'query-string';
import { useLocation } from 'react-router-dom';

export const Viewer = () => {
  const initialized = useRef<boolean>(false);
  const { loadFromOnChainTx } = usePTB();
  const location = useLocation();
  const [txHash, setTxHash] = useState<string | undefined>(undefined);

  useEffect(() => {
    const parsed = queryString.parse(location.search);
    if (parsed.tx && !initialized.current) {
      loadFromOnChainTx('sui:testnet', parsed.tx as string);
      initialized.current = true;
    } else {
      setTxHash('');
    }
  }, [loadFromOnChainTx, location.search, txHash]);

  return null;
};

Public API (Provider + Hook)

Provider (component)

import { PTBBuilder } from '@zktx.io/ptb-builder';

<PTBBuilder
  theme="dark"            // initial theme (dark | light | cobalt2 | "tokyo night" | cream | mint.breeze)
  address={myAddress}      // sender address
  gasBudget={500_000_000}  // optional gas budget
  executeTx={execAdapter}  // adapter to execute transactions
  onDocChange={saveDoc}    // PTBDoc autosave callback (debounced)
  showExportButton         // optional: show Export .ptb button (default: hidden)
>
  {/* your app here */}
</PTBBuilder>

Hook (public)

import { usePTB } from '@zktx.io/ptb-builder';

const { exportDoc, loadFromDoc, loadFromOnChainTx, setTheme } = usePTB();

// Export current PTB document
const doc = exportDoc({ sender: myAddress });

// Load document from memory or disk
loadFromDoc(doc);

// Load graph from on-chain transaction digest
await loadFromOnChainTx('sui:testnet', '0x1234…');

// Switch theme at runtime
setTheme('tokyo night');

---

Props Reference (<PTBBuilder />)

Prop	Type	Default	Description
theme	Theme (dark | light | cobalt2 | tokyo night | cream | mint.breeze)	"dark"	Initial UI theme.
address	string	–	Sender address for generated transactions.
gasBudget	number	–	Optional gas budget used for tx build/exec.
executeTx	(chain: Chain, tx?: Transaction) => Promise<{ digest?: string; error?: string }>	–	Adapter to execute transactions.
toast	ToastAdapter	console	Custom toast adapter used by the provider.
onDocChange	(doc: PTBDoc) => void	–	Autosave callback (debounced).
docChangeDelay	number (ms)	1000	Debounce for onDocChange.
showExportButton	boolean	false	If true, shows Export .ptb button in the CodePip panel.
children	React.ReactNode	–	Children rendered inside the Provider.

---

Document Format

PTB Builder persists graphs as PTBDoc objects containing:

• graph — nodes and edges of the PTB
• modules — embedded Move module metadata (for function signatures)
• objects — embedded object metadata (for owned assets)
• chain — target Sui network (e.g., sui:testnet)

This enables saving, sharing, and reloading graphs consistently across environments.

---

Notes on Network Sync

• Use useSuiClientContext() from @mysten/dapp‑kit to read/change the active Sui network.
• Keep PTB doc.chain in the form sui:<network>, e.g., sui:testnet.
• On file drop, prefer validating with /^sui:(mainnet|testnet|devnet)$/ before switching the network.

---

Roadmap

• Expanded sharing and collaboration features