Aggregation ISM
Aggregate security from multiple ISMs
Developers can use an
AggregationISM
to combine security from multiple ISMs. Simply put, an AggregationISM
requires that m
of n
ISMs verify a particular interchain message.AggregationISMs
must implement the IAggregationIsm
interface.// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.6.11;
import {IInterchainSecurityModule} from "../IInterchainSecurityModule.sol";
interface IAggregationIsm is IInterchainSecurityModule {
/**
* @notice Returns the set of modules responsible for verifying _message
* and the number of modules that must verify
* @dev Can change based on the content of _message
* @param _message Hyperlane formatted interchain message
* @return modules The array of ISM addresses
* @return threshold The number of modules needed to verify
*/
function modulesAndThreshold(bytes calldata _message)
external
view
returns (address[] memory modules, uint8 threshold);
}
The hyperlane-monorepo contains an
AggregationISM
implementation that application developers can deploy off-the-shelf, specifying their desired configuration.Developers can configure, for each origin chain, a set of
n
ISMs, and the number of ISMs needed to verify a message.AggregationISMs
can aggregate the security of any ISMs. For example, users can deploy a Multisig ISM with their own validator set, and deploy an AggregationISM
that aggregates that ISM with the Hyperlane default ISM.The hyperlane-deploy repo contains the tooling and instructions needed to deploy and configure an
AggregationISM
.The hyperlane-monorepo contains an abstract
AggregationISM
implementation that application developers can fork.Developers simply need to implement the
modulesAndThreshold()
function.By creating a custom implementation, application developers can tailor the security provided by a
AggregationISM
to the needs of their application.For example, a custom implementation could require that low value messages be verified by a Multisig ISM, and require that high value messages also be verified by a Wormhole ISM.
Last modified 2mo ago