SIP: PTB Structural Digest - #70
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Propose three related enhancements to PTBs: - Command Context: Expose previous command info to Move - Scoped Execution: Isolate groups of commands within transactions - Scope Witness: Cryptographic proof for same-scope verification Key design decision: scope_depth() returns 1 for both top-level PTB and explicit scope, preventing contracts from detecting isolation. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Major changes: - Lead with dynamic dispatch use case (eliminating hot potato wrappers) - Add Part 2: Argument Provenance - track where values came from - argument_source() returns Input/Result/NestedResult - Enables "accept coin only if from approved protocol" pattern - AMM censorship now secondary benefit of scopes - Add new open questions for argument indexing Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- All commands in a scope can see each other (not past-only) - Cut from 355 to ~190 lines — removed redundant explanations - Tightened rationale, security, backwards compat sections
92GC
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92GC
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Updated the description of the current_command_range_hash function for clarity.
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Add one native function on
sui::tx_context:This returns a versioned hash of a given sequential range of the current PTB commands.
This let's a contract lock in the part of a PTB it cares about,
while leaving the rest of the PTB open for wallets, solvers, sponsors, or other
composition.
This is more useful than a whole-PTB hash for smart accounts and governance,
because the authorized intent can be fixed without forcing the whole transaction
to be fixed.