DAppOperation

DAppOperation

bytes32 constant DAPP_TYPEHASH = keccak256(
    "DAppOperation(address from,address to,uint256 nonce,uint256 deadline,address control,address bundler,bytes32 userOpHash,bytes32 callChainHash)"
);

struct DAppOperation {
    address from;
    address to;
    uint256 nonce;
    uint256 deadline;
    address control;
    address bundler;
    bytes32 userOpHash;
    bytes32 callChainHash;
    bytes signature;
}

Description

The DAppOperation struct represents an operation initiated by a decentralized application (dApp) within the Atlas Protocol. It encapsulates all necessary details to validate and execute the operation securely.

Fields

Name	Type	Description
from	address	Address of the signer who authorized the DApp operation.
to	address	Atlas contract address intended to receive the operation.
nonce	uint256	Unique nonce for the DApp operation, ensuring replay protection and correct sequencing.
deadline	uint256	Block number by which the operation must be executed, preventing indefinite pending operations.
control	address	Address of the DAppControl contract managing governance and signatories for the dApp.
bundler	address	Address of the bundler (msg.sender) responsible for forwarding the transaction within the Atlas Protocol.
userOpHash	bytes32	Keccak256 hash of the user's operation (userOp.to and userOp.data), linking the user and dApp operations.
callChainHash	bytes32	Keccak256 hash of the solvers' transactions, ensuring the integrity of solver operations related to this dApp operation.
signature	bytes	Digital signature verifying the authenticity of the DApp operation, signed by from.

Usage Notes

• Security Assurance: The signature field ensures that only authorized dApps can initiate operations, safeguarding against unauthorized actions.
• Operation Linking: userOpHash and callChainHash create a secure linkage between user operations and solver operations, maintaining operational coherence.
• Deadline Enforcement: The deadline field prevents operations from being executed indefinitely, ensuring timely processing within the protocol.