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fix: reject rent sponsor self-referencing the token account#2257

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ananas-block merged 2 commits intomainfrom
fix/audit-issue-9-rent-sponsor-self
Feb 10, 2026
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fix: reject rent sponsor self-referencing the token account#2257
ananas-block merged 2 commits intomainfrom
fix/audit-issue-9-rent-sponsor-self

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@ananas-block ananas-block commented Feb 6, 2026

Summary

  • Reject initialization when the rent sponsor account is the same as the token account being created, preventing a self-referencing loop that could corrupt account state.

Audit issue #9 (INFO): The rent payer could be the same account as
the target token account being created. Add a check that rejects
this self-reference to prevent accounting issues.
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The head commit changed during the review from d5598e5 to 456b455.

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@ananas-block ananas-block force-pushed the fix/audit-issue-9-rent-sponsor-self branch from d5598e5 to 456b455 Compare February 9, 2026 15:48
@ananas-block ananas-block merged commit d3e93c0 into main Feb 10, 2026
30 checks passed
@ananas-block ananas-block deleted the fix/audit-issue-9-rent-sponsor-self branch February 10, 2026 00:16
SwenSchaeferjohann pushed a commit that referenced this pull request Feb 11, 2026
* fix: reject rent sponsor self-referencing the token account

Audit issue #9 (INFO): The rent payer could be the same account as
the target token account being created. Add a check that rejects
this self-reference to prevent accounting issues.

* test: add failing test rent sponsor self reference
SwenSchaeferjohann added a commit that referenced this pull request Feb 11, 2026
refactor

remove fetch-accounts

renaming, simplify trait

fomat

excl photon-api submodule

fix: multi-pass cold account lookup in test indexer RPC

Align get_account_interface and get_multiple_account_interfaces with
Photon's lookup strategy: search compressed_accounts by onchain_pubkey,
then by PDA seed derivation, then token_compressed_accounts, then by
token_data.owner. Also fix as_mint() to accept ColdContext::Account
since Photon returns mints as generic compressed accounts.

Co-authored-by: Cursor <cursoragent@cursor.com>

lint

fix lint

fix: reject rent sponsor self-referencing the token account (#2257)

* fix: reject rent sponsor self-referencing the token account

Audit issue #9 (INFO): The rent payer could be the same account as
the target token account being created. Add a check that rejects
this self-reference to prevent accounting issues.

* test: add failing test rent sponsor self reference

fix: process metadata add/remove actions in sequential order (#2256)

* fix: process metadata add/remove actions in sequential order

Audit issue #16 (LOW): should_add_key checked for any add and any
remove independently, ignoring action ordering. An add-remove-add
sequence would incorrectly remove the key. Process actions
sequentially so the final state reflects the actual order.

* chore: format

* test: add randomized test for metadata action processing

Validates that process_extensions_config_with_actions produces correct
AdditionalMetadataConfig for random sequences of UpdateMetadataField
and RemoveMetadataKey actions, covering the add-remove-add bug from
audit issue #16.

* test: add integration test for audit issue #13 (no double rent charge)

Verifies that two compress operations targeting the same compressible
CToken account in a single Transfer2 instruction do not double-charge
the rent top-up budget.

* chore: format extensions_metadata test

fix: validate authority on self-transfer early return (#2252)

* fix: handle self-transfer in ctoken transfer and transfer_checked

Validate that the authority is a signer and is the owner or delegate
before allowing self-transfer early return. Previously the self-transfer
path returned Ok(()) without any authority validation.

* fix: simplify map_or to is_some_and per clippy

* fix: use pubkey_eq for self-transfer check

* refactor: extract self-transfer validation into shared function

Extract duplicate self-transfer check from default.rs and checked.rs
into validate_self_transfer() in shared.rs with cold path for authority
validation.

* chore: format

* fix: deduplicate random metadata keys in test_random_mint_action

Random key generation could produce duplicate keys, causing
DuplicateMetadataKey error (18040) with certain seeds.

fix: enforce mint extension checks in cToken-to-cToken decompress (#2246)

* fix: enforce mint extension checks in cToken-to-cToken decompress hot path

Add enforce_extension_state() to MintExtensionChecks and call it in the
Decompress branch when decompress_inputs is None (hot-path, not
CompressedOnly restore). This prevents cToken-to-cToken transfers from
bypassing pause, transfer fee, and transfer hook restrictions.

* fix test

chore: reject compress for mints with restricted extensions in build_mint_extension_cache (#2240)

* chore: reject compress for mints with restricted extensions in mint check

* Update programs/compressed-token/program/src/compressed_token/transfer2/check_extensions.rs

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

* fix: format else-if condition for lint

---------

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

fix: token-pool index 0 check (#2239)

fix(programs): add MintCloseAuthority as restricted extension (M-03) (#2263)

* fix: add MintCloseAuthority as restricted extension (M-03)

A mint with MintCloseAuthority can be closed and re-opened with
different extensions. Treating it as restricted ensures compressed
tokens from such mints require CompressedOnly mode.

* test: add MintCloseAuthority compression_only requirement tests

Add test coverage for MintCloseAuthority requiring compression_only mode,
complementing the fix in f2da063.

refactor: light program pinocchio macro (#2247)

* refactor: light program pinocchio macro

* fix: address CodeRabbit review comments on macro codegen

- Fix account order bug in process_update_config (config=0, authority=1)
- Use backend-provided serialize/deserialize derives in LightAccountData
- Remove redundant is_pinocchio() branch for has_le_bytes unpack fields
- DRY doc attribute generation across 4 struct generation methods
- Unify unpack_data path using account_crate re-export for both backends

chore(libs): bump versions (#2272)

fix(programs): allow account-level delegate to compress CToken (M-02) (#2262)

* fix: allow account-level delegate to compress tokens from CToken (M-02)

check_ctoken_owner() only checked owner and permanent delegate.
An account-level delegate (approved via CTokenApprove) could not
compress tokens. Added delegate check after permanent delegate.

* test: compress by delegate

fix: accumulate delegated amount at decompression (#2242)

* fix: accumulate delegated amount at decompression

* fix lint

* refactor: simplify apply_delegate to single accumulation path

* fix: ignore delegated_amount without delegate

* restore decompress amount check

fix programtest, wallet owner tracking for ata

fmt and lint
SwenSchaeferjohann added a commit that referenced this pull request Feb 11, 2026
refactor

remove fetch-accounts

renaming, simplify trait

fomat

excl photon-api submodule

fix: multi-pass cold account lookup in test indexer RPC

Align get_account_interface and get_multiple_account_interfaces with
Photon's lookup strategy: search compressed_accounts by onchain_pubkey,
then by PDA seed derivation, then token_compressed_accounts, then by
token_data.owner. Also fix as_mint() to accept ColdContext::Account
since Photon returns mints as generic compressed accounts.

Co-authored-by: Cursor <cursoragent@cursor.com>

lint

fix lint

fix: reject rent sponsor self-referencing the token account (#2257)

* fix: reject rent sponsor self-referencing the token account

Audit issue #9 (INFO): The rent payer could be the same account as
the target token account being created. Add a check that rejects
this self-reference to prevent accounting issues.

* test: add failing test rent sponsor self reference

fix: process metadata add/remove actions in sequential order (#2256)

* fix: process metadata add/remove actions in sequential order

Audit issue #16 (LOW): should_add_key checked for any add and any
remove independently, ignoring action ordering. An add-remove-add
sequence would incorrectly remove the key. Process actions
sequentially so the final state reflects the actual order.

* chore: format

* test: add randomized test for metadata action processing

Validates that process_extensions_config_with_actions produces correct
AdditionalMetadataConfig for random sequences of UpdateMetadataField
and RemoveMetadataKey actions, covering the add-remove-add bug from
audit issue #16.

* test: add integration test for audit issue #13 (no double rent charge)

Verifies that two compress operations targeting the same compressible
CToken account in a single Transfer2 instruction do not double-charge
the rent top-up budget.

* chore: format extensions_metadata test

fix: validate authority on self-transfer early return (#2252)

* fix: handle self-transfer in ctoken transfer and transfer_checked

Validate that the authority is a signer and is the owner or delegate
before allowing self-transfer early return. Previously the self-transfer
path returned Ok(()) without any authority validation.

* fix: simplify map_or to is_some_and per clippy

* fix: use pubkey_eq for self-transfer check

* refactor: extract self-transfer validation into shared function

Extract duplicate self-transfer check from default.rs and checked.rs
into validate_self_transfer() in shared.rs with cold path for authority
validation.

* chore: format

* fix: deduplicate random metadata keys in test_random_mint_action

Random key generation could produce duplicate keys, causing
DuplicateMetadataKey error (18040) with certain seeds.

fix: enforce mint extension checks in cToken-to-cToken decompress (#2246)

* fix: enforce mint extension checks in cToken-to-cToken decompress hot path

Add enforce_extension_state() to MintExtensionChecks and call it in the
Decompress branch when decompress_inputs is None (hot-path, not
CompressedOnly restore). This prevents cToken-to-cToken transfers from
bypassing pause, transfer fee, and transfer hook restrictions.

* fix test

chore: reject compress for mints with restricted extensions in build_mint_extension_cache (#2240)

* chore: reject compress for mints with restricted extensions in mint check

* Update programs/compressed-token/program/src/compressed_token/transfer2/check_extensions.rs

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

* fix: format else-if condition for lint

---------

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

fix: token-pool index 0 check (#2239)

fix(programs): add MintCloseAuthority as restricted extension (M-03) (#2263)

* fix: add MintCloseAuthority as restricted extension (M-03)

A mint with MintCloseAuthority can be closed and re-opened with
different extensions. Treating it as restricted ensures compressed
tokens from such mints require CompressedOnly mode.

* test: add MintCloseAuthority compression_only requirement tests

Add test coverage for MintCloseAuthority requiring compression_only mode,
complementing the fix in f2da063.

refactor: light program pinocchio macro (#2247)

* refactor: light program pinocchio macro

* fix: address CodeRabbit review comments on macro codegen

- Fix account order bug in process_update_config (config=0, authority=1)
- Use backend-provided serialize/deserialize derives in LightAccountData
- Remove redundant is_pinocchio() branch for has_le_bytes unpack fields
- DRY doc attribute generation across 4 struct generation methods
- Unify unpack_data path using account_crate re-export for both backends

chore(libs): bump versions (#2272)

fix(programs): allow account-level delegate to compress CToken (M-02) (#2262)

* fix: allow account-level delegate to compress tokens from CToken (M-02)

check_ctoken_owner() only checked owner and permanent delegate.
An account-level delegate (approved via CTokenApprove) could not
compress tokens. Added delegate check after permanent delegate.

* test: compress by delegate

fix: accumulate delegated amount at decompression (#2242)

* fix: accumulate delegated amount at decompression

* fix lint

* refactor: simplify apply_delegate to single accumulation path

* fix: ignore delegated_amount without delegate

* restore decompress amount check

fix programtest, wallet owner tracking for ata

fmt and lint
SwenSchaeferjohann added a commit that referenced this pull request Feb 11, 2026
refactor

remove fetch-accounts

renaming, simplify trait

fomat

excl photon-api submodule

fix: multi-pass cold account lookup in test indexer RPC

Align get_account_interface and get_multiple_account_interfaces with
Photon's lookup strategy: search compressed_accounts by onchain_pubkey,
then by PDA seed derivation, then token_compressed_accounts, then by
token_data.owner. Also fix as_mint() to accept ColdContext::Account
since Photon returns mints as generic compressed accounts.

Co-authored-by: Cursor <cursoragent@cursor.com>

lint

fix lint

fix: reject rent sponsor self-referencing the token account (#2257)

* fix: reject rent sponsor self-referencing the token account

Audit issue #9 (INFO): The rent payer could be the same account as
the target token account being created. Add a check that rejects
this self-reference to prevent accounting issues.

* test: add failing test rent sponsor self reference

fix: process metadata add/remove actions in sequential order (#2256)

* fix: process metadata add/remove actions in sequential order

Audit issue #16 (LOW): should_add_key checked for any add and any
remove independently, ignoring action ordering. An add-remove-add
sequence would incorrectly remove the key. Process actions
sequentially so the final state reflects the actual order.

* chore: format

* test: add randomized test for metadata action processing

Validates that process_extensions_config_with_actions produces correct
AdditionalMetadataConfig for random sequences of UpdateMetadataField
and RemoveMetadataKey actions, covering the add-remove-add bug from
audit issue #16.

* test: add integration test for audit issue #13 (no double rent charge)

Verifies that two compress operations targeting the same compressible
CToken account in a single Transfer2 instruction do not double-charge
the rent top-up budget.

* chore: format extensions_metadata test

fix: validate authority on self-transfer early return (#2252)

* fix: handle self-transfer in ctoken transfer and transfer_checked

Validate that the authority is a signer and is the owner or delegate
before allowing self-transfer early return. Previously the self-transfer
path returned Ok(()) without any authority validation.

* fix: simplify map_or to is_some_and per clippy

* fix: use pubkey_eq for self-transfer check

* refactor: extract self-transfer validation into shared function

Extract duplicate self-transfer check from default.rs and checked.rs
into validate_self_transfer() in shared.rs with cold path for authority
validation.

* chore: format

* fix: deduplicate random metadata keys in test_random_mint_action

Random key generation could produce duplicate keys, causing
DuplicateMetadataKey error (18040) with certain seeds.

fix: enforce mint extension checks in cToken-to-cToken decompress (#2246)

* fix: enforce mint extension checks in cToken-to-cToken decompress hot path

Add enforce_extension_state() to MintExtensionChecks and call it in the
Decompress branch when decompress_inputs is None (hot-path, not
CompressedOnly restore). This prevents cToken-to-cToken transfers from
bypassing pause, transfer fee, and transfer hook restrictions.

* fix test

chore: reject compress for mints with restricted extensions in build_mint_extension_cache (#2240)

* chore: reject compress for mints with restricted extensions in mint check

* Update programs/compressed-token/program/src/compressed_token/transfer2/check_extensions.rs

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

* fix: format else-if condition for lint

---------

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

fix: token-pool index 0 check (#2239)

fix(programs): add MintCloseAuthority as restricted extension (M-03) (#2263)

* fix: add MintCloseAuthority as restricted extension (M-03)

A mint with MintCloseAuthority can be closed and re-opened with
different extensions. Treating it as restricted ensures compressed
tokens from such mints require CompressedOnly mode.

* test: add MintCloseAuthority compression_only requirement tests

Add test coverage for MintCloseAuthority requiring compression_only mode,
complementing the fix in f2da063.

refactor: light program pinocchio macro (#2247)

* refactor: light program pinocchio macro

* fix: address CodeRabbit review comments on macro codegen

- Fix account order bug in process_update_config (config=0, authority=1)
- Use backend-provided serialize/deserialize derives in LightAccountData
- Remove redundant is_pinocchio() branch for has_le_bytes unpack fields
- DRY doc attribute generation across 4 struct generation methods
- Unify unpack_data path using account_crate re-export for both backends

chore(libs): bump versions (#2272)

fix(programs): allow account-level delegate to compress CToken (M-02) (#2262)

* fix: allow account-level delegate to compress tokens from CToken (M-02)

check_ctoken_owner() only checked owner and permanent delegate.
An account-level delegate (approved via CTokenApprove) could not
compress tokens. Added delegate check after permanent delegate.

* test: compress by delegate

fix: accumulate delegated amount at decompression (#2242)

* fix: accumulate delegated amount at decompression

* fix lint

* refactor: simplify apply_delegate to single accumulation path

* fix: ignore delegated_amount without delegate

* restore decompress amount check

fix programtest, wallet owner tracking for ata

fmt and lint

upd amm test

simplify client usage, remove unnecessary endpoints

clean

cleanup

lint
SwenSchaeferjohann added a commit that referenced this pull request Feb 11, 2026
refactor

remove fetch-accounts

renaming, simplify trait

fomat

excl photon-api submodule

fix: multi-pass cold account lookup in test indexer RPC

Align get_account_interface and get_multiple_account_interfaces with
Photon's lookup strategy: search compressed_accounts by onchain_pubkey,
then by PDA seed derivation, then token_compressed_accounts, then by
token_data.owner. Also fix as_mint() to accept ColdContext::Account
since Photon returns mints as generic compressed accounts.

Co-authored-by: Cursor <cursoragent@cursor.com>

lint

fix lint

fix: reject rent sponsor self-referencing the token account (#2257)

* fix: reject rent sponsor self-referencing the token account

Audit issue #9 (INFO): The rent payer could be the same account as
the target token account being created. Add a check that rejects
this self-reference to prevent accounting issues.

* test: add failing test rent sponsor self reference

fix: process metadata add/remove actions in sequential order (#2256)

* fix: process metadata add/remove actions in sequential order

Audit issue #16 (LOW): should_add_key checked for any add and any
remove independently, ignoring action ordering. An add-remove-add
sequence would incorrectly remove the key. Process actions
sequentially so the final state reflects the actual order.

* chore: format

* test: add randomized test for metadata action processing

Validates that process_extensions_config_with_actions produces correct
AdditionalMetadataConfig for random sequences of UpdateMetadataField
and RemoveMetadataKey actions, covering the add-remove-add bug from
audit issue #16.

* test: add integration test for audit issue #13 (no double rent charge)

Verifies that two compress operations targeting the same compressible
CToken account in a single Transfer2 instruction do not double-charge
the rent top-up budget.

* chore: format extensions_metadata test

fix: validate authority on self-transfer early return (#2252)

* fix: handle self-transfer in ctoken transfer and transfer_checked

Validate that the authority is a signer and is the owner or delegate
before allowing self-transfer early return. Previously the self-transfer
path returned Ok(()) without any authority validation.

* fix: simplify map_or to is_some_and per clippy

* fix: use pubkey_eq for self-transfer check

* refactor: extract self-transfer validation into shared function

Extract duplicate self-transfer check from default.rs and checked.rs
into validate_self_transfer() in shared.rs with cold path for authority
validation.

* chore: format

* fix: deduplicate random metadata keys in test_random_mint_action

Random key generation could produce duplicate keys, causing
DuplicateMetadataKey error (18040) with certain seeds.

fix: enforce mint extension checks in cToken-to-cToken decompress (#2246)

* fix: enforce mint extension checks in cToken-to-cToken decompress hot path

Add enforce_extension_state() to MintExtensionChecks and call it in the
Decompress branch when decompress_inputs is None (hot-path, not
CompressedOnly restore). This prevents cToken-to-cToken transfers from
bypassing pause, transfer fee, and transfer hook restrictions.

* fix test

chore: reject compress for mints with restricted extensions in build_mint_extension_cache (#2240)

* chore: reject compress for mints with restricted extensions in mint check

* Update programs/compressed-token/program/src/compressed_token/transfer2/check_extensions.rs

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

* fix: format else-if condition for lint

---------

Co-authored-by: 0xa5df-c <172008956+0xa5df-c@users.noreply.github.com>

fix: token-pool index 0 check (#2239)

fix(programs): add MintCloseAuthority as restricted extension (M-03) (#2263)

* fix: add MintCloseAuthority as restricted extension (M-03)

A mint with MintCloseAuthority can be closed and re-opened with
different extensions. Treating it as restricted ensures compressed
tokens from such mints require CompressedOnly mode.

* test: add MintCloseAuthority compression_only requirement tests

Add test coverage for MintCloseAuthority requiring compression_only mode,
complementing the fix in f2da063.

refactor: light program pinocchio macro (#2247)

* refactor: light program pinocchio macro

* fix: address CodeRabbit review comments on macro codegen

- Fix account order bug in process_update_config (config=0, authority=1)
- Use backend-provided serialize/deserialize derives in LightAccountData
- Remove redundant is_pinocchio() branch for has_le_bytes unpack fields
- DRY doc attribute generation across 4 struct generation methods
- Unify unpack_data path using account_crate re-export for both backends

chore(libs): bump versions (#2272)

fix(programs): allow account-level delegate to compress CToken (M-02) (#2262)

* fix: allow account-level delegate to compress tokens from CToken (M-02)

check_ctoken_owner() only checked owner and permanent delegate.
An account-level delegate (approved via CTokenApprove) could not
compress tokens. Added delegate check after permanent delegate.

* test: compress by delegate

fix: accumulate delegated amount at decompression (#2242)

* fix: accumulate delegated amount at decompression

* fix lint

* refactor: simplify apply_delegate to single accumulation path

* fix: ignore delegated_amount without delegate

* restore decompress amount check

fix programtest, wallet owner tracking for ata

fmt and lint

upd amm test

simplify client usage, remove unnecessary endpoints

clean

cleanup

lint
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2 participants