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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| // SPDX-License-Identifier: MIT | ||
| pragma solidity >=0.8.0; | ||
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| import { UNLIMITED_DELEGATION } from "./constants.sol"; | ||
| import { IDelegationControl } from "./interfaces/IDelegationControl.sol"; | ||
| import { SystemCall } from "./SystemCall.sol"; | ||
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| type Delegation is bytes32; | ||
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| using DelegationInstance for Delegation global; | ||
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| library DelegationInstance { | ||
| function exists(Delegation self) internal pure returns (bool) { | ||
| return Delegation.unwrap(self) != bytes32(""); | ||
| } | ||
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| function isUnlimited(Delegation self) internal pure returns (bool) { | ||
| return Delegation.unwrap(self) == UNLIMITED_DELEGATION; | ||
| } | ||
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| function isLimited(Delegation self) internal pure returns (bool) { | ||
| return exists(self) && !isUnlimited(self); | ||
| } | ||
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| /** | ||
| * Verify a delegation. | ||
| * Returns true if the delegation exists and is valid, false otherwise. | ||
| * Note: verifying the delegation might have side effects in the delegation control contract. | ||
| */ | ||
| function verify( | ||
| Delegation self, | ||
| address delegator, | ||
| address delegatee, | ||
| bytes32 systemId, | ||
| bytes memory funcSelectorAndArgs | ||
| ) internal returns (bool) { | ||
| // Early return if there is an unlimited delegation | ||
| if (isUnlimited(self)) return true; | ||
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| // Early return if there is no valid delegation | ||
| if (!exists(self)) return false; | ||
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| // Call the delegation control contract to check if the delegator has granted access to the delegatee | ||
| (bool success, bytes memory data) = SystemCall.call({ | ||
| caller: delegatee, | ||
| resourceSelector: Delegation.unwrap(self), | ||
| funcSelectorAndArgs: abi.encodeWithSelector( | ||
| IDelegationControl.verify.selector, | ||
| delegator, | ||
| systemId, | ||
| funcSelectorAndArgs | ||
| ), | ||
| value: 0 | ||
| }); | ||
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| if (!success) return false; | ||
| return abi.decode(data, (bool)); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| // SPDX-License-Identifier: MIT | ||
| pragma solidity >=0.8.0; | ||
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| import { WorldContextConsumer } from "./WorldContext.sol"; | ||
| import { IDelegationControl } from "./interfaces/IDelegationControl.sol"; | ||
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| abstract contract DelegationControl is WorldContextConsumer, IDelegationControl {} |
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