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Asa Oines e8d90775f7 Add Aggregation ISM (#1737) ... ### Description This PR introduces the Aggregation ISM, which requires interchain messages to be verified by an m-of-n ISM set. This PR also introduces a new MultisigISM, which does not make use of the "commitment" optimization in its metadata. The previous MultisigISM has been moved to LegacyMultisigISM. Both AggregationISM and MultisigISM have abstract contracts that require `valuesAndThreshold` implementations. This PR implements versions with static m-of-n sets, using the EIP-3448 MetaProxy standard. These implementations are intended to be combined with a future RoutingISM implementation to replace LegacyMultisigISM. ### Drive-by changes - genhtml in solidity code coverage ### Related issues - Fixes #1522 ### Backward compatibility _Are these changes backward compatible?_ Yes ### Testing _What kind of testing have these changes undergone? Unit Tests		2 years ago
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igps	Check IGP ownership, transfer IGP ownership in the initializer (#1895)	2 years ago
isms	Add Aggregation ISM (#1737)	2 years ago
libs	Add Aggregation ISM (#1737)	2 years ago
middleware	Add non-struct API for IQS and ICA middlewares (#1989)	2 years ago
mock	On chain gas oracles in the IGP (#1765)	2 years ago
test	Add Aggregation ISM (#1737)	2 years ago
upgrade	Consistent addresses for upgradable contracts (#1389)	2 years ago
Create2Factory.sol	Merge core and app packages (#1169)	2 years ago
GasRouter.sol	Implement GasRouter (#1621)	2 years ago
HyperlaneConnectionClient.sol	Interoperable Interchain Accounts (#1832)	2 years ago
Mailbox.sol	OverheadIGP.sol, deploy new IGPs, deploy ValidatorAnnounce (#1572)	2 years ago
OwnableMulticall.sol	Use bytecode deployer for ICA auth (#1914)	2 years ago
PausableReentrancyGuard.sol	Leverage storage refunds in pausable guard (#1696)	2 years ago
Router.sol	Interoperable Interchain Accounts (#1832)	2 years ago
ValidatorAnnounce.sol	ValidatorAnnounce contract (#1531)	2 years ago