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20. Programmable Transaction Blocks (PTBs)

Composing up to 1,024 commands in one atomic transaction.

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Programmable Transaction Blocks (PTBs) allow client SDKs to chain multiple commands (split coin, transfer, call Move functions) into a single atomic transaction where outputs of one step feed as inputs to the next without writing intermediate smart contract wrappers.

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Check your understanding

1. What is a Programmable Transaction Block (PTB) on Sui?
A heterogeneous batch of up to 1,024 instructions executed atomically in one transactionA smart contract fileA mining blockA consensus round
2. Can the output object of command #1 in a PTB be passed as an argument to command #2?
Yes, PTB commands chain outputs directly to inputs seamlesslyNo, requires writing to disk firstOnly for native SUIOnly on devnet

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