epic(evm): fungible tokens: Coin to ERC20 and ERC20 to Coin

[Unique-Divine]

Objective

Extend the x/evm module to enable the creation of coins (native fungible tokens) from ERC20 contract tokens on the Nibiru EVM, and to create ERC20 tokens from coins.

Specification

Specification Backlink (Notion)

Tickets

See User Stories (Spec)

• test(eth): Eth E2E or integration tests using deployed Solidity contracts #1882
• feat(evm): Impl a way to send ERC20 tokens to a Nibiru base account as bank coins using the FunToken mapping #1944
• feat(evm): Impl tx message to change a bank coin into ERC20 using an existing FunToken mapping #1943
• feat(evm): Impl CreateFunTokenFromCoin #1942: Functionality to create the FunToken mapping for a bank coin, producing a corresponding ERC20 contract.
• feat(evm): Impl CreateFunTokenFromERC20 #1941: Functionality to create the FunToken mapping for an ERC20 token contract, producing a bank coin by storing its metadata in state.
• feat(evm): Impl a query for FunToken mapping by coin denom or ERC20 contract address #1940
• [WIP] Describe and create tickets for frontend UI/UX changes to fit into sprints. For example, MetaMask setup

---

This ticket is part of #1836

[Unique-Divine]

Update: Assigned "homework" to the group to deliberate on designs and draft and initial proposal. cc @onikonychev @k-yang

[cgilbe27]

https://github.com/NibiruChain/web-app/issues/1077