CLI and ContractKit support all accepted fee currencies equally, including for transfers and for use as fee currencies

[nicolasbrugneaux]

Description

copy/paste from Q1 OKRs: cLabs 2024 Q1 Objectives FINAL

USDC first-class developer experience in Celo SDKs

Developer experience

Working backwards from the developer experience to see what SDK changes need to be made.

I'm writing demo scripts for how USDC would be used as a fee currency in celo-org/feecurrency

Viem demo (Recommended)

Tasks

Beta Give feedback

1. ERC20 demo transfer with cUSD
2. ERC20 demo transfer with STBLTEST
3. Add celo fee.estimateFeePerGas viem#10
   +0

What about celo-ethers-wrapper? Is it worth including that as an option or should we just link to the ethers discussion?

Celo SDK demos (Discouraged)

Tasks

Beta Give feedback

1. ERC20 demo transfer with cUSD (web3js + @celo/connect)
2. ERC20 demo transfer with cUSD (@celo/contractkit)
3. ERC20 demo transfer with STBLTEST (@celo/contractkit)
4. ERC20 demo transfer with STBLTEST (web3js + @celo/connect)

Celo CLI/SDK changes

Tasks

Beta Give feedback

1. USDC related changes #151
   +0
   

[arthurgousset]

Currently working on:

• USDC: @celo/connect + web3js demo feecurrency#3

[arthurgousset]

(for future reference)

PR that added cEUR in the past:

• cEUR ContractKit support celo-monorepo#7257

We're not planning to use this pattern for USDC, but linking in case it's useful for context.

[arthurgousset]

Asked to faucet STBLTEST tokens on alfajores for testing

• Adapter address: 0xDB93874fE111F5a87Acc11Ff09Ee9450Ac6509AE
• ERC20 token address: 0x780c1551C2Be3ea3B1f8b1E4CeDc9C3CE40da24E

[arthurgousset]

Quickly check fee currencies from the Terminal:

Alfajores:

$ cast call 0xB8641365dBe943Bc2fb6977e6FBc1630EF47dB5a "getWhitelist() (address[] memory)" --rpc-url='https://alfajores-forno.celo-testnet.org'
[0x874069Fa1Eb16D44d622F2e0Ca25eeA172369bC1, 0x10c892A6EC43a53E45D0B916B4b7D383B1b78C0F, 0xE4D517785D091D3c54818832dB6094bcc2744545, 0x03d3daB843e6c03b3d271eff9178e6A96c28D25f, 0xB0FA15e002516d0301884059c0aaC0F0C72b019D, 0xc9cce1e51F1393CE39EB722E3e59eDE6faBf89fD, 0xC4f86E9B4A588D501c1c3e25628dFd50Bc8D615e, 0xDB93874fE111F5a87Acc11Ff09Ee9450Ac6509AE, 0x7d027790998f714B294c96Fda9E27AF586d1EbB5, 0x1aD7b617cB6c5156A6dea6E47514D16476b99F38]

Mainnet:

Call the getWhitelist() function on the FeeCurrencyWhitelist.sol contract deployed at 0xbb024e9cdcb2f9e34d893630d19611b8a5381b3c.

$ cast call 0xbb024e9cdcb2f9e34d893630d19611b8a5381b3c "getWhitelist() (address[] memory)" --rpc-url='https://forno.celo.org'   
[0x765DE816845861e75A25fCA122bb6898B8B1282a, 0xD8763CBa276a3738E6DE85b4b3bF5FDed6D6cA73, 0xe8537a3d056DA446677B9E9d6c5dB704EaAb4787, 0x73F93dcc49cB8A239e2032663e9475dd5ef29A08]

[arthurgousset]

Re demos

I converted all demos from cUSD into STBLTEST fee currency transactions.

• All demos work ✅
• The changes are committed ✅
• The README is updated with usage instructions ✅.

The only thing left here is:

• to update the demo README and constants.ts with the official USDC token and adapter addresses (once deployed), and
  

• to remove the disclaimer from the README
  

• Any refactoring and improvements to the scripts and/or README you can think of

Re CLI and SDK changes

I pushed all my work in progress changes ✅
I left comments and my personal TODOs in the PR for reference ✅

[arthurgousset]

All good to hand-over from here @nicolasbrugneaux 👍