codec: create codec module

[jmank88]

This PR creates a separate, top-level module codec, which contains the relayer/codec and relayer/chainreader/loop packages. The old packages are deprecated but remain compatible by forwarding to the new module.

Supports:

• use chainlink-aptos/codec module chainlink#23011

TODO:

• Does CI run the unit tests in their new location?
• Split into two PRs to satisfy CI check for non-default branch commit hashes

[jmank88]

These tests use packages from the main module which pollutes the go.mod. We can either leave the tests behind the main module only, or find a way to adapt them.

[faisal-chainlink]

we can keep them in the main module since they're technically integration-ish tests (they test CR & Indexer functionality indirectly)

[FelixFan1992]

types are migrated here

[faisal-chainlink]

I wonder if those types belong to the top-level codec module, not a hard opinion though, I can see it working both here and in relayer/common

[Copilot]

Pull request overview

This PR factors Sui codec-related functionality into a new top-level Go module github.com/smartcontractkit/chainlink-sui/codec, moving the existing relayer/codec and relayer/chainreader/loop implementations there while keeping the old packages as deprecated forwarders for compatibility.

Changes:

• Introduces a new codec module containing JSON decoding/type conversion, BCS conversion, encoding, and LOOP chain reader logic (plus unit/integration tests).
• Converts existing relayer/codec and relayer/chainreader/loop packages into deprecated wrappers that forward to the new module.
• Updates root and submodule go.mod files (and go.md dependency diagram) to depend on/replace the new codec module.

Reviewed changes

Copilot reviewed 25 out of 28 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
scripts/go.mod	Adds local replace + indirect require for the new codec module.
integration-tests/go.mod	Adds local replace + indirect require for the new codec module.
deployment/go.mod	Adds local replace + indirect require for the new codec module.
go.mod	Adds codec module dependency and local replace to ./codec.
go.md	Updates module dependency diagrams to include chainlink-sui/codec.
codec/go.mod	New standalone codec module definition and dependencies.
codec/go.sum	New codec module sums.
codec/types.go	New shared codec types + Sui address helpers + event structs.
codec/json_decoder.go	New mapstructure-based JSON return decoder.
codec/type_converters.go	New type-conversion registry + mapstructure decode hook.
codec/type_converters_test.go	Unit tests for type conversion behaviors.
codec/bcs_converter.go	New BCS primitive/vector conversion registry.
codec/bcs_converter_test.go	Unit tests for BCS converter behaviors.
codec/encoder.go	New encoding logic for Move/Sui argument values.
codec/decoder.go	New decoding utilities + execution report deserialization.
codec/decoder_test.go	Adjusts base64 decode test to not depend on removed shared.DecodeBase64.
codec/loop/loop_reader.go	New LOOP chain reader implementation under codec/loop.
codec/loop/loop_reader_test.go	Adds tests for LOOP reader boundary behaviors (currently build-tagged integration).
relayer/codec/types.go	Converts relayer codec types into aliases/forwarders to codec.
relayer/codec/type_converters.go	Converts relayer type converter into deprecated aliases/forwarders to codec.
relayer/codec/encoder.go	Converts relayer encoder into deprecated forwarder to codec.
relayer/codec/decoder.go	Converts relayer decoder into deprecated forwarders to codec.
relayer/codec/bcs_converter.go	Converts relayer BCS converter into deprecated forwarders to codec.
relayer/chainreader/loop/loop_reader.go	Converts relayer LOOP reader into deprecated forwarder to codec/loop.
relayer/chainreader/loop/loop_reader_test.go	Updates test to use codec/loop implementation directly.
bindings/bind/utils.go	Deprecates/forwards Sui address helpers to codec.
bindings/bind/json_decoder.go	Deprecates/forwards JSON return decoding to codec.
bindings/bind/common.go	Aliases bind.Object to codec.Object for backward compatibility.

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[faisal-chainlink]

This is much cleaner, thanks for creating the PR!

Small heads up that I might make some minor changes to the codec in the next couple of days as I complete the o11y integration.

[FelixFan1992]

This is much cleaner, thanks for creating the PR!

Small heads up that I might make some minor changes to the codec in the next couple of days as I complete the o11y integration.

can we merge this so your change is on top of this?