Help me~! Decimals Change

[polygongogogo]

Hi!
While studying the code, a curiosity arose.
Common tokens use decimal 18.
In the case of usdc, decimal 6 is used.
'wmatic -> usdc' is easy, but
I can't convert 'usdc -> wmatic'.

1. Quick Swap change - normal
   0 amountIn uint256 100000
   1 amountOutMin uint256 96914488002955915
   2 path address[] 2791bca1f2de4661ed88a30c99a7a9449aa84174
   0d500b1d8e8ef31e21c99d1db9a6444d3adf1270
   3 to address ad7fed7efb657b33eddda41825d44c235eeedd81
   4 deadline uint256 3256334716

2. Ethers code change - code

0 amountIn uint256 10000000000000000
1 amountOutMin uint256 0
2 path address[] 2791bca1f2de4661ed88a30c99a7a9449aa84174
0d500b1d8e8ef31e21c99d1db9a6444d3adf1270
3 to address ad7fed7efb657b33eddda41825d44c235eeedd81
4 deadline uint256 1628169153009

i used ethers. code (your code)

[zemse]

If you want to set 1000 USDC, you need to use:

amountIn = ethers.utils.parseUnits('1000', 6); // note that second argument here is the decimals of USDC

(moving to discussions)

[crazydevlegend]

I have the same issue.
I'm using Fetcher.fetchTokenData to get the decimals for a specific token.
But in case of USDC (avalanche), it shows an error :

/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/logger/lib/index.js:233
        var error = new Error(message);
                    ^

Error: call revert exception [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (method="decimals()", data="0x", errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.6.4)
    at Logger.makeError (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/logger/lib/index.js:233:21)
    at Logger.throwError (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/logger/lib/index.js:242:20)
    at Interface.decodeFunctionResult (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/abi/lib/interface.js:388:23)
    at Contract.<anonymous> (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/contracts/lib/index.js:395:56)
    at step (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/contracts/lib/index.js:48:23)
    at Object.next (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/contracts/lib/index.js:29:53)
    at fulfilled (/home/crazy/Desktop/projects/swap-price/node_modules/@ethersproject/contracts/lib/index.js:20:58)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  reason: null,
  code: 'CALL_EXCEPTION',
  method: 'decimals()',
  data: '0x',
  errorArgs: null,
  errorName: null,
  errorSignature: null,
  address: '0x6e84a6216eA6dACC71eE8E6b0a5B7322EEbC0fDd',
  args: [],
  transaction: {
    data: '0x313ce567',
    to: '0x6e84a6216eA6dACC71eE8E6b0a5B7322EEbC0fDd'
  }
}

I have no idea about how to figure out this issue.
Can anyone help me with this?

Here's my code :
const inTokenInfo = await Fetcher.fetchTokenData(ChainId.MAINNET, Token1);

[zemse]

You mentioned you want for USDC avalanche while in the code snippet there's MAINNET. Also in the error it's visible that the response data is "0x", so probably there is no code at the address. I think the issue is probably incorrect addresses maybe you are checking USDC avalanche on mainnet. Can you confirm if network and address is proper?

[crazydevlegend]

Thank you, @zemse
I could see TraderJoe-xyz/sdk is forked from uniswap/sdk and used chain id ChainId.Avalanche instead of ChainId.MAINNET.
And now it works fine!!!
You're right, @zemse . The issue came from wrong contract address!!!
Thanks again for your kind & perfect answer.
🙇‍♂️ 🙇‍♂️ 🙇‍♂️ 🙇‍♂️ 🙇‍♂️