Signing transactions with Metamask?

[rhubarbgarden]

Hi everyone, new to blockchain front-end and new to ethers.js.

I'm trying to write a dapp connected to a smart contract that will allow me to read and write, connected via Metamask. However my code is failing at the point where I am trying to execute/sign a transaction.

  async function loadWeb3() {
    if (window.ethereum) {
      await window.ethereum.enable();
      setAccount(window.ethereum.selectedAddress);
    }
    else if (window.ethereum) {
      window.web3 = new ethers.providers.Web3Provider(window.ethereum.currentProvider)
    }
    else {
      window.alert('Non-Ethereum browser detected. You should consider trying MetaMask!')
    }
  }
  
    const provider = new ethers.providers.Web3Provider(window.ethereum)
    const signer = provider.getSigner()

    const contract = new ethers.Contract(claimAddress, claimAbi, signer);
      
...

        async function claim() {
        let val = await contract.claim()
        return val;
    }

// Unhandled Rejection (Error): cannot estimate gas; transaction may fail or may require manual gas limit (error={"code":-32603,"message":"execution reverted: Nothing available","data"

Will I need to manage properties like gasPrice and nonce? I found in another issue to use contract.seapExactTokensForTokens but I can't find any reference to this in the documentation.

[zemse]

You can see the message in your error that says "execution reverted: Nothing available". Can you check with your smart contract, it should have a require statement "Nothing available" that should be failing, that's causing error for you