fix(permit): add support for usdc mainnet #3231
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USDC detected as eip2612 |
| 'USD//C' | ||
| 'USD Coin' | ||
| ) | ||
| export const USDC_GOERLI = new Token( | ||
| SupportedChainId.GOERLI, | ||
| '0x07865c6e87b9f70255377e024ace6630c1eaa37f', | ||
| 6, | ||
| 'USDC', | ||
| 'USD//C' | ||
| 'USD Coin' |
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This works on a fresh page, doesn't seem to if the website was used before...
I'm guessing this is because of cached token lists.
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Actually, the bad cached name is on my favourite tokens
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Resolved hackishly by mapping token name USD//C to USD Coin 😬
alfetopito
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| // For now, this is a problem for favourite tokens cached locally with the hardcoded name for USDC token | ||
| // Using the wrong name breaks the signature. | ||
| const [permitParams, chainId, _tokenName, ...rest] = callDataParams | ||
| const tokenName = _tokenName === 'USD//C' ? 'USD Coin' : _tokenName |
alfetopito
changed the title
| @@ -19,6 +26,7 @@ export async function buildDaiLikePermitCallData({ | |||
| callDataParams, | |||
| }: BuildDaiLikePermitCallDataParams): Promise<string> { | |||
| const callData = await eip2162Utils.buildDaiLikePermitCallData(...callDataParams) | |||
| console.log(`[buildDaiLikePermitCallData]`, callDataParams, callData) | |||
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Please, don't forget to remove console.log
| @@ -31,3 +32,10 @@ export const ORDER_TYPE_SUPPORTS_PERMIT: Record<TradeType, boolean> = { | |||
| } | |||
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| export const PENDING_ORDER_PERMIT_CHECK_INTERVAL = ms`1min` | |||
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| // DAI's mainnet contract (https://etherscan.io/address/0x6b175474e89094c44da98b954eedeac495271d0f#readContract) returns | |||
| // `1` for the version, while when calling the contract method returns `2`. | |||
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Sorry, I didn't get the problem. I see DAI contract returns version=1, where do we get version=2?
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I don't know where it comes from!
But that's what we get when calling the version method 🤷
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fetch("https://rpc.ankr.com/eth", {
"headers": {
"accept": "*/*",
"content-type": "application/json",
},
"referrer": "http://localhost:3000/",
"referrerPolicy": "strict-origin-when-cross-origin",
"body": "{\"method\":\"eth_call\",\"params\":[{\"to\":\"0x6b175474e89094c44da98b954eedeac495271d0f\",\"data\":\"0x54fd4d50\"},\"latest\"],\"id\":49,\"jsonrpc\":\"2.0\"}",
"method": "POST",
"mode": "cors",
"credentials": "omit"
}).then(res => res.json()).then(console.log)
It's very odd. I really see that version=2 in the JSON rpc response
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Summary
Fixes #3148
Make USDC on mainnet permittable \o/
(And any other token that has a different
version)TODODONEThere are 3 pending issues:
USDC not permittable when loadingFIXEDUSD//C, different from contract'sUSD CoinDAI no longer permittableFIXEDThe
versionfetched is2While the value when looking at etherescan is
1Not sure this issue is only for DAI or for any DAI like token
Not able to place order due to low feeFIXEDEstimated fee for the quote is much lower than what is calculated for the real user account.
This was an expected edge case which should have been addressed with increased defaults.
See this thread for more context
It was an issue with the local cache. Succeeded now: https://dev.explorer.cow.fi/orders/0xf087fab4df05bb0f6bb1e96d1915106312248cf900d410a2465d231b5d63ad2a5b0abe214ab7875562adee331deff0fe1912fe42652e9ae9?tab=overview
To Test
permittableTokens:v10xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48) should contain:{"type":"eip-2612","version":"2"}