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https://docs.metamask.io/wallet/reference/json-rpc-api/

window.web3 is no longer injected by metamask, instead it is window.ethereum, but loads of methods are missing. It used to be very simple, just:

contract = new window.web3.eth.Contract(abi, address);
...
const a = await contract.methods.testCall().call();

I don't understand how to do this now, there is no Contract method. There is a request({"method": "eth_call"...) but I don't understand how to use it.

It seems like they took something very simple that was working and broke it.

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    You can always embed your own copy of web3 in your page, and initialize it to use window.ethereum as rpc provider.
    – Ismael ♦
    Nov 21 at 3:34

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