I am using AlchemyProvider with ether.js to deploy a smart contract using frontend data But I am not able to sign the provider i.e AlchemyProvider.


const provider = new ethers.providers.AlchemyProvider("maticmum","apikey");
const signer = provider.getSigner()


Error: API provider does not support signing (operation="getSigner", code=UNSUPPORTED_OPERATION, version=providers/5.7.2)

1 Answer 1

AlchemyProvider extends UrlJsonRpcProvider

and UrlJsonRpcProvider implements getSigner as follows:

getSigner(address?: string): JsonRpcSigner {
    return logger.throwError(
        "API provider does not support signing",
        { operation: "getSigner" }

If you need a signer for deployment - create wallet and pass the alchemy provider to it:

const signer = new ethers.Wallet("PRIVATE_KEY", ALCHEMY_PROVIDER)
  • Thanks @Konsantin its working now. Mar 8, 2023 at 13:36

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