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Add validation for ForwardingInfo in MsgTransfer's ValidateBasic

Mark fields not needing to be nullable as with `gogoproto.nullable = false` option

Refactor transfer protos to unify Hop and Trace

Path forwarding: delete previous packet after packet lifecycle completes for next packet

Make linter only run on diff of changes

Update ADR 001 to reflect changes from `DenomTrace` refactor to `Denom`

ICS20 v2 Support for path forwarding

Cache go dependencies in GitHub Actions e2e tests

Use `ibctestcoin.TestCoin` through-out tests.

Make ibctesting.TestCoins be multiple coins

docs: add docs for interchain account events

docs: update transfer events for previous releases

Use `types.NewDenom` instead of initializing with `types.Denom { ... }`

docs: high click rate on relayer section should supply hyperlink

docs: light mode IBC-Go Documentation blue text frequently clicked but it is not a hyperlink

docs: missing navigation in smaller screen display

docs: mobile header has overlapping search and menu

docs: issue with mobile version for 'next'

docs: default to latest supported version

Release v9

Change `MerklePath` to use `bytes` instead of `string`

Remove unnecessary methods on client keeper in favour of plain functions

Look into transfer_authz code and write tests to cover all cases.

Emit tokens in events as Json encoded.

Add a helper method that gets the AppVersion and returns the unmarshalled packet data.

Mark token field as deprecated (MsgTransfer)

Test ledger compatibility

ICS20-V2 audit follow up issues

Move logic for creating packet data bytes to own function

Ledger support regression for `MsgTransfer` with ics20-2