Release Notes

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Improvements

• #8615 Support custom address codecs in transfer.

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Dependencies

• #8369 Bump github.com/CosmWasm/wasmvm to 2.2.4
• #8369 Bump github.com/ethereum/go-ethereum to 1.15.11

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Improvements

• (core/api) #8303 Prefix-based routing in IBCv2 Router
• (apps/callbacks) #8353 Add field in callbacks data for custom calldata

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Testing API

• #8371 e2e: Create only necessary number of chains for e2e suite.
• #8375 feat: parse IBC v2 packets from ABCI events

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Features

• (light-clients/07-tendermint) #8185 Allow scaling of trusting period for client upgrades

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Dependencies

• #8254 Bump github.com/cosmos/cosmos-sdk to 0.53.0
• #8326 Bump cosmossdk.io/x/upgrade to 0.2.0
• #8326 Bump cosmossdk.io/api to 0.9.2
• #8293 Bump cosmossdk.io/math to 1.5.3
• #8254 Bump cosmossdk.io/core to 0.11.3
• #8254 Bump cosmossdk.io/store to 1.1.2
• #8254 Bump cosmossdk.io/x/tx to 0.14.0
• #8253 Bump cosmossdk.io/errors to 1.0.2
• #8253 Bump cosmossdk.io/log to 1.5.1
• #8253 Bump github.com/cometbft/cometbft to 0.38.17
• #8264 Bump github.com/prysmaticlabs/prysm to v5.3.0

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Bug Fixes

• #8287 rename total_escrow REST query from denoms to total_escrow

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Security Fixes

• Fix ISA-2025-001 security vulnerability.
• Fix ASA-2025-004 security vulnerability.

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Features

• (core) #7505 Add IBC Eureka (IBC v2) implementation, enabling more efficient IBC packet handling without channel dependencies, bringing significant performance improvements.
• (apps/transfer) #7650 Add support for transfer of entire balance for vesting accounts.
• (apps/wasm) #5079 08-wasm light client proxy module for wasm clients by.
• (core/02-client) #7936 Clientv2 module.
• (core/04-channel) #7933 Channel-v2 genesis.
• (core/04-channel, core/api) #7934 - Callbacks Eureka.
• (light-clients/09-localhost) #6683 Make 09-localhost stateless.
• (core, app) #6902 Add channel version to core app callbacks.

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Dependencies

• #8181 Bump github.com/cosmos/cosmos-sdk to 0.50.13
• #7932 Bump go to 1.23
• #7330 Bump cosmossdk.io/api to 0.7.6
• #6828 Bump cosmossdk.io/core to 0.11.1
• #7182 Bump cosmossdk.io/log to 1.4.1
• #7264 Bump cosmossdk.io/store to 1.1.1
• #7585 Bump cosmossdk.io/math to 1.4.0
• #7540 Bump github.com/cometbft/cometbft to 0.38.15
• #6828 Bump cosmossdk.io/x/upgrade to 0.1.4
• #8124 Bump cosmossdk.io/x/tx to 0.13.7
• #7942 Bump github.com/cosmos/cosmos-db to 1.1.1
• #7224 Bump github.com/cosmos/ics23/go to 0.11.0

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API Breaking

• (core, apps) #7213 Remove capabilities from SendPacket.
• (core, apps) #7225 Remove capabilities from WriteAcknowledgement.
• (core, apps) #7232 Remove capabilities from channel handshake methods.
• (core, apps) #7270 Remove remaining dependencies on capability module.
• (core, apps) #4811 Use expected interface for legacy params subspace
• (core/04-channel) #7239 Removed function LookupModuleByChannel
• (core/05-port) #7252 Removed function LookupModuleByPort
• (core/24-host) #7239 Removed function ChannelCapabilityPath
• (apps/27-interchain-accounts) #7239 The following functions have been removed: AuthenticateCapability, ClaimCapability
• (apps/27-interchain-accounts) #7961 Removed absolute-timeouts flag from send-tx in the ICA CLI.
• (apps/transfer) #7239 The following functions have been removed: BindPort, AuthenticateCapability, ClaimCapability
• (capability) #7279 The module capability has been removed.
• (testing) #7305 Added TrustedValidators map to TestChain. This removes the dependency on the x/staking module for retrieving trusted validator sets at a given height, and removes the GetTrustedValidators method from the TestChain struct.
• (23-commitment) #7486 Remove unimplemented BatchVerifyMembership and BatchVerifyNonMembership functions
• (core/02-client, light-clients) #5806 Decouple light client routing from their encoding structure.
• (core/04-channel) #5991 The client CLI QueryLatestConsensusState has been removed.
• (light-clients/06-solomachine) #6037 Remove Initialize function from ClientState and move logic to Initialize function of LightClientModule.
• (light-clients/06-solomachine) #6230 Remove GetTimestampAtHeight, Status and UpdateStateOnMisbehaviour functions from ClientState and move logic to functions of LightClientModule.
• (core/02-client) #6084 Removed stakingKeeper as an argument to NewKeeper and replaced with a ConsensusHost implementation.
• (testing) #6070 Remove AssertEventsLegacy function.
• (core) #6138 Remove Router reference from IBC core keeper and use instead the router on the existing PortKeeper reference.
• (core/04-channel) #6023 Remove emission of non-hexlified event attributes packet_data and packet_ack.
• (core) #6320 Remove unnecessary Proof interface from exported package.
• (core/05-port) #6341 Modify UnmarshalPacketData interface to take in the context, portID, and channelID. This allows for packet data’s to be unmarshaled based on the channel version.
• (apps/27-interchain-accounts) #6433 Use UNORDERED as the default ordering for new ICA channels.
• (apps/transfer) #6440 Remove GetPrefixedDenom.
• (apps/transfer) #6508 Remove the DenomTrace type.
• (apps/27-interchain-accounts) #6598 Mark the requests repeated field of MsgModuleQuerySafe non-nullable.
• (23-commmitment) #6644 Introduce commitment.v2.MerklePath to include repeated bytes in favour of repeated string. This supports using merkle path keys which include non UTF-8 encoded runes.
• (23-commmitment) #6870 Remove commitment.v1.MerklePath in favour of commitment.v2.MerklePath.
• (apps/27-interchain-accounts) #6749 The ICA controller NewIBCMiddleware constructor function sets by default the auth module to nil.
• (core, core/02-client) #6763 Move prometheus metric labels for 02-client and core into a separate metrics package on core.
• (core/02-client) #6777 The NewClientProposalHandler of 02-client has been removed.
• (core/types) #6794 The composite interface QueryServer has been removed from package core/types. Please use the granular QueryServer interfaces provided by each core submodule.
• (light-clients/06-solomachine) #6888 Remove TypeClientMisbehaviour constant and the Type method on Misbehaviour.
• (light-clients/06-solomachine, light-clients/07-tendermint) #6891 The VerifyMembership and VerifyNonMembership functions of solomachine’s ClientState have been made private. The VerifyMembership, VerifyNonMembership, GetTimestampAtHeight, Status and Initialize functions of tendermint’s ClientState have been made private.
• (core/04-channel) #6902 Add channel version to core application callbacks.
• (core/03-connection, core/02-client) #6937 Remove ‘ConsensusHost’ interface, also removing self client and consensus state validation in the connection handshake.
• (core/24-host) #6882 All functions ending in Path have been removed from 24-host in favour of their sybling functions ending in Key.
• (23-commmitment) #6633 MerklePath has been changed to use repeated bytes in favour of repeated strings.
• (23-commmitment) #6644 Introduce commitment.v2.MerklePath to include repeated bytes in favour of repeated string. This supports using merkle path keys which include non UTF-8 encoded runes.
• (23-commmitment) #6870 Remove commitment.v1.MerklePath in favour of commitment.v2.MerklePath.
• #6923 The JSON msg API for VerifyMembershipMsg and VerifyNonMembershipMsg payloads for client contract SudoMsg has been updated. The field path has been changed to merkle_path. This change requires updates to 08-wasm client contracts for integration.
• (apps/callbacks) #7000 Add base application version to contract keeper callbacks.
• (light-clients/08-wasm) #5154 Use bytes in wasm contract api instead of wrapped.
• (core, core/08-wasm) #5397 Add coordinator Setup functions to the Path type.
• (core/05-port) #6341 Modify UnmarshalPacketData interface to take in the context, portID, and channelID. This allows for packet data’s to be unmarshaled based on the channel version.
• (core/02-client) #6863 remove ClientStoreProvider interface in favour of concrete type.
• (core/05-port) #6988 Modify UnmarshalPacketData interface to return the underlying application version.
• (apps/27-interchain-accounts) #7053 Remove ICS27 channel capability migration introduced in v6.
• (apps/27-interchain-accounts) #8002 Remove ICS-29: fee middleware.
• (core/04-channel) #8053 Remove channel upgradability.

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State Machine Breaking

• (light-clients/06-solomachine) #6313 Fix: No-op to avoid panicking on UpdateState for invalid misbehaviour submissions.
• (apps/callbacks) #8014 Callbacks will now return an error acknowledgement if the recvPacket callback fails. This reverts all app callback changes whereas before we only reverted the callback changes. We also error on all callbacks if the callback data is set but malformed whereas before we ignored the error and continued processing.
• (apps/callbacks) #5349 Check if clients params are duplicates.
• (apps/transfer) #6268 Use memo strings instead of JSON keys in AllowedPacketData of transfer authorization.
• (light-clients/07-tendermint) Fix: No-op to avoid panicking on UpdateState for invalid misbehaviour submissions.
• (light-clients/06-solomachine) #6313 Fix: No-op to avoid panicking on UpdateState for invalid misbehaviour submissions.

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Improvements

• (testing)#7430 Update the block proposer in test chains for each block.
• (apps/27-interchain-accounts) #5533 ICA host sets the host connection ID on OnChanOpenTry, so that ICA controller implementations are not obliged to set the value on OnChanOpenInit if they are not able.
• (core/02-client, core/03-connection, apps/27-interchain-accounts) #6256 Add length checking of array fields in messages.
• (light-clients/08-wasm) #5146 Use global wasm VM instead of keeping an additional reference in keeper.
• (core/04-channels) #7935 Limit payload size for both v1 and v2 packet.
• (core/runtime) #7601 - IBC core runtime env.
• (core/08-wasm) #5294 Don’t panic during any store operations.
• (apps) #5305- Remove GetSigners from sdk.Msg implementations.
• (apps) #/5778 Use json for marshalling/unmarshalling transfer packet data.
• (core/08-wasm) #5785 Allow module safe queries in ICA.
• (core/ante) #6278 Performance: Exclude pruning from tendermint client updates in ante handler executions.
• (core/ante) #6302 Performance: Skip app callbacks during RecvPacket execution in checkTx within the redundant relay ante handler.
• (core/ante) #6280 Performance: Skip redundant proof checking in RecvPacket execution in reCheckTx within the redundant relay ante handler.
• #6716 Add HasModule to capability keeper to allow checking if a scoped module already exists.

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Bug Fixes

• (apps/27-interchain-accounts) #7277 Use GogoResolver when populating module query safe allow list to avoid panics from unresolvable protobuf dependencies.
• (core/04-channel) #7342 Read Tx cmd flags including from address to avoid Address cannot be empty error when upgrade-channels via cli.
• (core/03-connection) #7397 Skip the genesis validation connectionID for localhost client.
• (apps/27-interchain-accounts) #6377 Generate ICA simtest proposals only for provided keepers.

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Testing API

• #7688 Added SendMsgsWithSender to TestChain.
• #7430 Update block proposer in testing
• #5493 Add IBCClientHeader func for endpoint and update tests
• #6685 Configure relayers to watch only channels associated with an individual test
• #6758 Tokens are successfully forwarded from A to C through B