RPC eth_getBlockByNumber dose not work as expected in the project ethers.js

[banishee]

System info: [Include Ethermint commit, operating system name, and other relevant details]

• branch dev

Steps to reproduce:

1. Project ethers.js calls eth_getBlockByNumber on projectethermint, then returns the result as follows:

2. Project ethers.js calls eth_getBlockByNumber on project ethereum, then returns the result as follows:

3. Because the value of extraData from ethermint is 0x0，it will cause the hex length check to fail https://github.com/ethers-io/ethers.js/blob/master/packages/providers/src.ts/formatter.ts#L200

Expected behavior: [What you expected to happen]

• ethers.js is a famous ethereum related project. I wish the value of extraData on ethermint could be consistent with project ethereum

Actual behavior: [What actually happened]

Additional info: [Include gist of relevant config, logs, etc.]

[github-actions[bot]]

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