feat: Soroban (Stellar) port of DonationHandler#8
Conversation
Port DonationHandler.sol to a Soroban contract in stellar/. The EVM
native-vs-ERC20 split collapses into a single token: Address path via the
Stellar Asset Contract, so donate / donate_many handle native XLM and any
issued asset (USDC, etc.). Carries the arbitrary data payload (projectId) and
emits a DonationMade event (topics: [donation, recipient, token]; data:
{amount, data}) for the indexer.
- No ReentrancyGuard: Soroban's deterministic auth + stateless design (only
calls the host SAC, holds no balances) make it unnecessary.
- Upgradeable via admin-gated update_current_contract_wasm (replaces the OZ
proxy pattern).
- 10 unit tests (soroban-sdk testutils) cover single/batch transfers, event
emission, length/sum validation, and admin/upgrade auth.
- Verified on testnet: single + 2-recipient batch donations transferred funds
and emitted DonationMade with the projectId payload intact.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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WalkthroughThis PR adds a Soroban DonationHandler contract (single and batched SAC transfers), crate config and .gitignore, README docs with API and examples, and a comprehensive test suite validating success and failure paths. ChangesSoroban DonationHandler Contract
Sequence DiagramsequenceDiagram
participant Donor
participant DonationHandler
participant TokenSAC
participant Indexer
Donor->>DonationHandler: donate(from, token, recipient, amount, data)
activate DonationHandler
DonationHandler->>DonationHandler: validate amount > 0
DonationHandler->>TokenSAC: transfer(from, recipient, amount)
activate TokenSAC
TokenSAC->>TokenSAC: move funds
TokenSAC-->>DonationHandler: success
deactivate TokenSAC
DonationHandler->>DonationHandler: emit DonationMade(recipient, token, amount, data)
deactivate DonationHandler
DonationHandler-->>Indexer: DonationMade event
Donor->>DonationHandler: donate_many(from, token, total_amount, recipients[], amounts[], data[])
activate DonationHandler
DonationHandler->>DonationHandler: validate lengths match & non-empty
DonationHandler->>DonationHandler: checked sum(amounts) == total_amount
loop recipients
DonationHandler->>TokenSAC: transfer(from, recipient_i, amount_i)
DonationHandler->>DonationHandler: emit DonationMade(recipient_i, token, amount_i, data_i)
end
deactivate DonationHandler
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Poem
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Actionable comments posted: 4
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@stellar/README.md`:
- Around line 39-47: Update the README function signatures to reflect the
contract's fallible interface: annotate each entrypoint to return Result types
(e.g., initialize(...) -> Result<(), Error>, donate(...) -> Result<(), Error>,
donate_many(...) -> Result<(), Error>, set_admin(...) -> Result<(), Error>,
upgrade(...) -> Result<(), Error>) and change admin() to return Result<Address,
Error> to match the crate which errors before initialization; explicitly
reference the Error return type used in stellar/src/lib.rs so integrations know
these calls can fail and must handle Result.
In `@stellar/src/lib.rs`:
- Around line 79-84: The initialize function is currently permissionless;
restrict it to deployment-time authority by recording the deployer and checking
the invoker: add a DEPLOYER storage key and set it at deployment (once) and
change initialize to require env.invoker() == stored DEPLOYER before setting
ADMIN; reference the initialize function, ADMIN key, and the new DEPLOYER key
(and keep set_admin/upgrade checks unchanged to rely on ADMIN) so only the
recorded deployer can call initialize and become the first admin.
In `@stellar/src/test.rs`:
- Around line 20-22: The shared test setup function setup() currently calls
Env::mock_all_auths(), which globally disables auth checks; remove that call
from setup() so tests run with real authorization by default, and instead call
Env::mock_all_auths() only inside individual happy-path tests that truly need to
bypass auth; for admin-gated entrypoints (e.g., the upgrade and set_admin
methods referenced in tests), add at least one negative test that does not mock
auth and asserts the invocation fails due to missing authorization (check the
returned error or invocation status and validate the auth/authorization tree as
appropriate), and update any existing tests that depended on global mocking to
explicitly enable Env::mock_all_auths() in their body.
- Around line 181-201: Add two tests for the admin-gated upgrade entrypoint: one
happy-path where the admin can call upgrade(new_wasm_hash) and one
unauthorized-path where a non-admin cannot. Locate the upgrade entrypoint (calls
env.deployer().update_current_contract_wasm(new_wasm_hash)) and create a test
setup that does NOT call setup().mock_all_auths() (or add a new helper like
setup_no_auth or setup_with_only_admin_mock) so require_auth() actually enforces
permissions; in the success test mock the admin auth only and call
s.client.upgrade(&admin, &new_hash) and assert it succeeds (and/or that the
deployer was invoked), and in the failure test use a non-admin caller (e.g.,
s.donor) without mocking their auth, call s.client.upgrade(&non_admin,
&new_hash) and assert the call returns an error and no wasm update occurred.
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stellar/.gitignorestellar/Cargo.tomlstellar/README.mdstellar/src/lib.rsstellar/src/test.rs
| ```rust | ||
| fn initialize(admin: Address); // once; sets the admin (Ownable) | ||
| fn donate(from, token, recipient, amount, data); // single donation | ||
| fn donate_many(from, token, total_amount, // batch; sum(amounts) must == total_amount | ||
| recipients, amounts, data); | ||
| fn admin() -> Address; | ||
| fn set_admin(new_admin: Address); // admin-gated | ||
| fn upgrade(new_wasm_hash: BytesN<32>); // admin-gated WASM upgrade | ||
| ``` |
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Align the documented signatures with the actual fallible interface.
This block shows infallible methods, but the contract in stellar/src/lib.rs returns Result<_, Error> for every entrypoint, and admin specifically fails before initialization. Please document the Result return types here so integrations do not assume these calls cannot error.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@stellar/README.md` around lines 39 - 47, Update the README function
signatures to reflect the contract's fallible interface: annotate each
entrypoint to return Result types (e.g., initialize(...) -> Result<(), Error>,
donate(...) -> Result<(), Error>, donate_many(...) -> Result<(), Error>,
set_admin(...) -> Result<(), Error>, upgrade(...) -> Result<(), Error>) and
change admin() to return Result<Address, Error> to match the crate which errors
before initialization; explicitly reference the Error return type used in
stellar/src/lib.rs so integrations know these calls can fail and must handle
Result.
| fn setup() -> Setup<'static> { | ||
| let env = Env::default(); | ||
| env.mock_all_auths(); |
There was a problem hiding this comment.
🧩 Analysis chain
🌐 Web query:
In soroban-sdk 26.0.1 testutils, does Env::mock_all_auths() authorize every require_auth call in the test environment, and what is the recommended way to test unauthorized calls fail?
💡 Result:
Yes. In soroban-sdk 26.0.1 testutils, Env::mock_all_auths “mock[s] all calls to the Address::require_auth and Address::require_auth_for_args functions in invoked contracts, having them succeed as if authorization was provided.” [1] Recommended way to test unauthorized calls fail: 1) Don’t rely on mock_all_auths for this. It forces require_auth/require_auth_for_args to succeed, so an “unauthorized” path won’t fail due to missing auth. [1] 2) Disable mocking and assert the transaction fails due to missing/insufficient auth. Additionally, soroban-sdk explicitly warns: “A test that uses mock_all_auths without verifying the resulting authorization tree via auths can pass even when a contract is missing a require_auth check. Use auths after the contract call to assert that the expected authorizations were required.” [1] In practice for “unauthorized should fail”, write the test without mock_all_auths (or call Env::set_auths to turn mocking off per the docs) and then check that the invoke returns an error such as txBAD_AUTH / HostError(Auth, …) depending on where the require_auth is triggered. [1][2]
Citations:
- 1: https://docs.rs/soroban-sdk/latest/soroban_sdk/struct.Env.html
- 2: https://developers.stellar.org/docs/learn/fundamentals/contract-development/errors-and-debugging/debugging-errors
Avoid global Env::mock_all_auths() in shared setup()
In soroban-sdk 26.0.1, Env::mock_all_auths() mocks all Address::require_auth / require_auth_for_args calls to succeed, so the suite can pass even if authorization checks are missing or incorrect. Keep setup() neutral and add negative auth coverage that fails without proper authorization.
- Remove/avoid blanket
mock_all_auths()from shared setup; enable it only in specific happy-path tests that need it, or disable mocking for “unauthorized should fail” cases. - For admin-gated entrypoints (including
upgrade/set_admin), add at least one unauthorized negative test and assert the invocation fails due to missing auth (and check the auths/authorization tree as appropriate).
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@stellar/src/test.rs` around lines 20 - 22, The shared test setup function
setup() currently calls Env::mock_all_auths(), which globally disables auth
checks; remove that call from setup() so tests run with real authorization by
default, and instead call Env::mock_all_auths() only inside individual
happy-path tests that truly need to bypass auth; for admin-gated entrypoints
(e.g., the upgrade and set_admin methods referenced in tests), add at least one
negative test that does not mock auth and asserts the invocation fails due to
missing authorization (check the returned error or invocation status and
validate the auth/authorization tree as appropriate), and update any existing
tests that depended on global mocking to explicitly enable Env::mock_all_auths()
in their body.
| #[test] | ||
| fn set_admin_changes_owner() { | ||
| let s = setup(); | ||
| let new_admin = Address::generate(&s.env); | ||
| s.client.set_admin(&new_admin); | ||
| assert_eq!(s.client.admin(), new_admin); | ||
| } | ||
|
|
||
| #[test] | ||
| fn donor_balance_insufficient_panics() { | ||
| // The SAC transfer itself enforces balance; donating more than the donor | ||
| // holds must fail (the whole tx reverts). | ||
| let s = setup(); | ||
| let recipient = Address::generate(&s.env); | ||
| let data = Bytes::new(&s.env); | ||
| let res = s | ||
| .client | ||
| .try_donate(&s.donor, &s.token, &recipient, &2_000_000, &data); | ||
| assert!(res.is_err()); | ||
| assert_eq!(s.token_client.balance(&recipient), 0); | ||
| } |
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🧩 Analysis chain
🌐 Web query:
In soroban-sdk 26.0.1 tests, what is the recommended pattern for validating a contract entrypoint that calls update_current_contract_wasm, including unauthorized-call assertions?
💡 Result:
In soroban-sdk 26.0.1, the recommended pattern for validating a contract entrypoint that performs an upgrade via update_current_contract_wasm involves rigorous access control verification and the use of the SDK's testing utilities [1][2]. Key components of the testing pattern include: 1. Access Control Validation: Because update_current_contract_wasm is a privileged operation, your test must verify that unauthorized callers cannot trigger the upgrade [1][2]. Use the try_variant of your client method (e.g., client.try_upgrade(&wasm_hash)) to capture the expected error result when an unauthorized account attempts the call [1]. 2. Authorized Invocation Assertion: To verify that the authorized admin successfully triggers the update, use env.auths to inspect the authorization state [1]. This allows you to assert that the correct address provided the required authorization for the upgrade invocation [1]. 3. Contract Client Re-instantiation: After a successful upgrade, if the new WASM introduces changes (such as new functions), the previous client instance will be out of date [1]. You must generate a new client for the same contract ID to interact with the updated code [1]. Example Test Structure: #[test] fn test_upgrade_authorization { let env = Env::default; env.mock_all_auths; // Use testutils to simplify auth setup let admin = Address::generate(&env); let contract_id = env.register(UpgradeableContract, (&admin,)); let client = UpgradeableContractClient::new(&env, &contract_id); // 1. Verify unauthorized call fails let unauthorized_user = Address::generate(&env); // Assuming the contract checks auth internally let result = client.try_upgrade(&new_wasm_hash); assert!(result.is_err); // Assert expected error // 2. Verify authorized call succeeds client.upgrade(&new_wasm_hash); // 3. Assert correct auth invocation assert_eq!( env.auths, std::vec![( admin, AuthorizedInvocation { function: AuthorizedFunction::Contract(( contract_id.clone, symbol_short!("upgrade"), (new_wasm_hash,).into_val(&env),)), sub_invocations: std::vec![] })]); } Note that in the Soroban environment, the effect of update_current_contract_wasm is immediate within the lifecycle of the transaction, but architectural constraints may prevent calling new functions added by the upgraded WASM in the same invocation [3]. Consequently, complex upgrades involving data migrations often require a two-step process or a dedicated migration function executed after the upgrade [3].
Citations:
- 1: https://developers.stellar.org/docs/build/guides/conventions/upgrading-contracts
- 2: https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0049.md
- 3: [SEP-49] Upgradeable Contracts stellar/stellar-protocol#1670
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Add authorization + success coverage for admin-gated upgrade(new_wasm_hash)
stellar/src/lib.rs defines an admin-gated upgrade that calls env.deployer().update_current_contract_wasm(new_wasm_hash), but stellar/src/test.rs has no tests for this entrypoint (it only covers set_admin and donation flows). Since setup() calls env.mock_all_auths(), an unauthorized-upgrade test needs a dedicated setup (no mock_all_auths, or only admin auth mocked) so require_auth() can actually fail.
Add:
- a happy-path test: admin can successfully call
upgrade(new_wasm_hash) - an unauthorized-path test: non-admin cannot upgrade (assert the client call returns an error / fails auth)
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@stellar/src/test.rs` around lines 181 - 201, Add two tests for the
admin-gated upgrade entrypoint: one happy-path where the admin can call
upgrade(new_wasm_hash) and one unauthorized-path where a non-admin cannot.
Locate the upgrade entrypoint (calls
env.deployer().update_current_contract_wasm(new_wasm_hash)) and create a test
setup that does NOT call setup().mock_all_auths() (or add a new helper like
setup_no_auth or setup_with_only_admin_mock) so require_auth() actually enforces
permissions; in the success test mock the admin auth only and call
s.client.upgrade(&admin, &new_hash) and assert it succeeds (and/or that the
deployer was invoked), and in the failure test use a non-admin caller (e.g.,
s.donor) without mocking their auth, call s.client.upgrade(&non_admin,
&new_hash) and assert the call returns an error and no wasm update occurred.
Review fixes for the Soroban DonationHandler: - Replace the two-step initialize() with __constructor(admin), which runs atomically at deploy. This removes the front-running window where an attacker could call initialize() before the deployer and seize admin (and thus upgrade) rights. - Iterate the batch vecs with zip() instead of get_unchecked indexing. - Add a test proving a batch with insufficient funds reverts atomically (no partial donations); drop the now-obsolete initialize-twice test. - Remove a duplicated cfg(test) attribute; clippy is clean. Redeployed to testnet: CCAWXIU37ILOKXRPJVL56VJAVLJRKGNFSIXCAOLO3YFEDJV6DZRMJLAL (admin set by constructor, donation verified on-chain). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Adds a Soroban (Rust) port of the EVM
DonationHandler.solunderstellar/. It enables donations of native XLM and any Stellar-issued asset (USDC, etc.) through one unified entrypoint, carries the arbitrarydatapayload (ourprojectId), and emits aDonationMadeevent for the indexer.Follows the feasibility report (
giveth-v6-core/stellar-feasibility-report.md) and implements its Section 1 recommendations.What changed
stellar/src/lib.rs— the contract:donate(from, token, recipient, amount, data)anddonate_many(from, token, total_amount, recipients, amounts, data)— the EVMdonateETH/donateManyETH/donateERC20/donateManyERC20collapse into these two, because the Stellar Asset Contract (SAC) exposes native XLM and issued assets behind one SEP-41 interface.__constructor(admin)sets the owner atomically at deploy — no separate, front-runnableinitialize.admin/set_admin(Ownable-equivalent) andupgrade(new_wasm_hash)— admin-gatedupdate_current_contract_wasm(replaces the OZ upgradeable proxy).DonationMadeevent — topics[Symbol("donation"), recipient, token], data{ amount, data }.stellar/src/test.rs— 10 unit tests (soroban-sdk testutils), incl. atomic-revert on insufficient funds.stellar/README.md— EVM↔Soroban mapping, event schema, build/deploy commands, testnet deployment details.Design notes
ReentrancyGuard. Soroban verifies a deterministic, signed auth tree before execution; this contract only calls the host-provided SAC (which can't re-enter our code) and holds no balance state.initialize. Deploy+init is atomic, eliminating the window where someone could claimadminbefore the deployer.token.transfer(from, recipient, amount)(mirrors the EVMsafeTransferFrom); the contract never custodies funds.sum(amounts) == total_amount.Test plan
cargo test— 10/10 passing (single/batch transfer, event emission, length/sum mismatch, empty batch, zero amount, atomic revert on insufficient funds, admin/constructor, set_admin).cargo clippy --all-targets— clean.stellar contract build— 5,439-byte WASM, 6 exported functions.CCAWXIU37ILOKXRPJVL56VJAVLJRKGNFSIXCAOLO3YFEDJV6DZRMJLAL.DonationMadewithdata=0000002a.DonationMadeevents with distinct payloads.Follow-ups (out of scope here)
blockchain-integration-service(Soroban RPCgetEvents).giveth-v6-core(@stellar/stellar-sdk+@creit.tech/stellar-wallets-kit).🤖 Generated with Claude Code
Summary by CodeRabbit
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