Adopt the Skip Block SDK & x/feemarket (EIP-1559)

[mpoke]

Summary

Adopt the Skip Block SDK and include the EIP-1559 fee market lane.

Problem Definition

The current fee market on the Cosmos Hub is very rudimentary and overdue for an upgrade. Transactions are charged a minimum fee irregardless of network load or demand, which is set by governance. Individual validators may choose to responsively increase fees by changing their local configuration. See gov proposal 842 for more details.

Proposal

After the Cosmos Hub upgrades to Cosmos SDK 0.47 and has proven the software is stable, the subsequent upgrade should adopt the open-source Block SDK, the primary research and development focus of Skip Protocol built on ABCI++, and include the EIP-1559 fee market lane that Skip is building in collaboration with Osmosis Labs. (cf. gov proposal 842).

Task list

Must have

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1. align with Skip on integration docs
2. integrate Block SDK
3. include the EIP-1559 fee market lane
4. add necessary tests (e2e/integration)

Nice to have

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No tasks being tracked yet.

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For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned
• Is a spike necessary to map out how the issue should be approached?

[mpoke]

Relevant resources (thanks to Skip Protocol):

• docs on block-sdk and how to integrate it https://docs.skip.money/chains/overview/
• block-sdk testapp docs https://github.com/skip-mev/block-sdk/tree/main/tests/app
• block-sdk repo https://github.com/skip-mev/block-sdk/tree/main
• EIP-1559 implementation repo https://github.com/skip-mev/feemarket/tree/main