FallbackProvider: If only one provider is used, it is not possible to get the block number

[samuelexferri]

Ethers Version

6.0.2

Search Terms

FallbackProvider

Describe the Problem

I am using ethers v6.0.2 and when I use a FallbackProvider with only one JsonRpcProvider in the provider array I get an error.

I'm working on a fix!

Code Snippet

providersArray.push({
  provider: new ethers.JsonRpcProvider(providerUrls[i], network, {
    polling: true,
    staticNetwork: network,
  }),
  stallTimeout: 10000,
  weight: 3,
  priority: 1,
});

const provider = new ethers.FallbackProvider(providersArray, network); // Default Quorum is 2, so must have at least > 2 weight

provider.getBlockNumber().then((blockNumber) => {
  console.log(`Block Number: ${blockNumber}`);
});

Contract ABI

No response

Errors

Error:
 TypeError: invalid numeric value (argument="value", value=null, code=INVALID_ARGUMENT, version=6.0.2)
    at makeError (file:///Users/user/project/node_modules/ethers/lib.esm/utils/errors.js:109:21)
    at assert (file:///Users/user/project/node_modules/ethers/lib.esm/utils/errors.js:132:15)
    at assertArgument (file:///Users/user/project/node_modules/ethers/lib.esm/utils/errors.js:143:5)
    at getNumber (file:///Users/user/project/node_modules/ethers/lib.esm/utils/maths.js:139:5)
    at #checkQuorum (file:///Users/user/project/node_modules/ethers/lib.esm/providers/provider-fallback.js:385:46)
    at #waitForQuorum (file:///Users/user/project/node_modules/ethers/lib.esm/providers/provider-fallback.js:456:46)
    at #waitForQuorum (file:///Users/user/project/node_modules/ethers/lib.esm/providers/provider-fallback.js:477:41)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async FallbackProvider._perform (file:///Users/user/project/node_modules/ethers/lib.esm/providers/provider-fallback.js:509:24)
    at async #perform (file:///Users/user/project/node_modules/ethers/lib.esm/providers/abstract-provider.js:207:16) {
  code: 'INVALID_ARGUMENT',
  argument: 'value',
  value: undefined
}

Environment

No response

Environment (Other)

No response