[RPC] Cannot directly serve StatefulBlock i.e. no automatic reflection

[bianyuanop]

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Background

This issue relates to #697, where I added support of Archiver in Tokenvm. However, blocks cannot be directly served by RPC where Transaction.block.txs.action cannot be unmarshalled, which needs reflection. Relevant Unmarshall function called at requester.go. An automatic reflection is needed to solve this.

Error log

2024/01/24 09:35:55 error frmo client requesting{error 26 0 failed to decode client response: json: cannot unmarshal object into Go struct field Transaction.block.txs.action of type chain.Action http://127.0.0.1:44647/ext/bc/27fLMWHkogB7pWLVrWwyRTNjsLyDszhCrytMtG1kUNzmFdLQtq/tokenapi}

To reproduce

Clone https://github.com/bianyuanop/hypersdk, checkout to s3archiver branch. Create a file named disk_config.json and put following content inside

{
    "archiverType": "disk",
    "enabled": true,
    "location": "/tmp/tokenvm"
}

CD examples/tokenvm Run

MODE="test" ARCHIVER_CONFIG_PATH="./disk_conf.json" ./scripts/run.sh

[bianyuanop]

One way to avoid this that we can direcly return bytes then do the reflection manually

[manojkgorle]

websocket_packer has that. https://github.com/ava-labs/hypersdk/blob/d27a71b3b49231cda90ab1aafbc481bf77831eb6/rpc/websocket_packer.go#L34

[github-actions[bot]]

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