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I am using hardhat and ethers.js for testing and when I call

WETHSigner = await ethers.provider.getSigner(WETHHolderAddress);

it fails but this works:

WETHSigner = await ethers.getSigner(WETHHolderAddress);

Can someone explain with an example between a provider and a network?

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When you use the @nomiclabs/hardhat-ethers plugin, the ethers object in the Hardhat Runtime Environment has a couple of extra properties added:

  • ethers.provider is an ethers provider connected to the chosen network. So if you run a script with, for example, hh run script.js --network localhost, then ethers.provider will be connected to http://localhost:8545. You can use it as any ethers provider, and call methods like ethers.provider.getBlockNumber.
  • Some helper methods are also added, like ethers.getSigner or ethers.getContractFactory. You can check the full list in the plugin's docs.

Besides this, you also have the rest of the properties/methods exposed by ethers itself, like ethers.utils.

With respect to the difference between ethers.getSigner and ethers.provider.getSigner, they are pretty much equivalent, except for two things:

  • ethers.getSigner returns a promise, while ethers.provider.getSigner don't. That is, you need to use await in the first case.
  • The Signer returned by ethers.getSigner is a wrapper created by the plugin that behaves pretty much exactly like the one returned by ethers.provider.getSigner, except that it has a .address property, so you don't need to call signer.getAddress(), which is an async function.
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  • Thanks for this answer! But What's the difference between ethers.provider.getSigner and ethers.getSigner ? Jul 14 at 17:12
  • Sorry, I missed that that was the main point of your question. I actually don't know why the first case fails for you, so you should expand on that. As I explained in the (edited) answer, they are pretty much the same thing, except for the two differences I explained. Jul 14 at 17:32

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