Ethers.js – Retrieving the Provider Object from a Wallet Object

ethers.js

How can I get the provider from a Wallet when using ethersjs?

I have tried getting the provider through wallet.provider but this is different from the Ethereum provider which has the send method.

I have also tried the following:

const network = await wallet.provider.getNetwork();
const provider = new providers.JsonRpcProvider(network);

The JsonRpcProvider in this case should return a provider object which has the send method that is different from wallet.provider. However, the above still doesn't work because I'm not sure how I can convert from the wallet to the provider without losing any information.

Best Answer

If your wallet is connected to the provider you should be able to get the providers object using wallet.provider

if you are trying to access the send function of the provider try creating a provider with JsonRpcProvider like:

create a provider with new ethers. providers.JsonRpcProvider(<networkUrl>)
but I guess this send function is used to fetch blockchain with raw data

if you are trying to send transaction using ethers provider directly. use provider.sendTransaction(<signedTransaction>) this will send your signed Transaction to blockchain

Related Solutions

Ethers.js Function – Can jsonRpcProvider.getSigner() Take Any Address?

Backends like Metamask, Geth, Parity (and many more) have an RPC interface that allows an external application to interact with them using eth_signTransaction or personal_signTransaction RPC methods, while not giving access to private keys to the application. The application has to prepare an unsigned transaction object and send it to the provider. And in response, the provider returns back the signature, which the application can then broadcast to the network (some providers can also broadcast the transaction).

Providers that support managing multiple accounts or HD wallets, require the application to specify an address usually using the from key, when sending a transaction object to the provider.

The provider.getSigner(address) in ethers.js, takes in an address and creates a JsonRpcSigner instance, which uses the appropriate methods in from field when submitting a transaction. If you just pass in any random eth address whose private key is not with the provider, the provider will attempt if it has in its accounts, else it will just give you some error. I just checked with Metamask, and it gives this error: Invalid parameters: must provide an Ethereum address.. It can be different for different providers.

Ethers.js – How to Decode Input Data in Ethers.js

You need the input types as well to be able to decode it.

const data = '0x7ff36ab50000000000000000000000000000000000000000000000bc18ba4144048bbab00000000000000000000000000000000000000000000000000000000000000080000000000000000000000000c0c5eb43e2df059e3be6e4fb0284c283caa5991900000000000000000000000000000000000000000000000000000000614d87a80000000000000000000000000000000000000000000000000000000000000002000000000000000000000000bb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c00000000000000000000000008ba0619b1e7a582e0bce5bbe9843322c954c340';

ethers.utils.defaultAbiCoder.decode(
  ['uint256', 'address[]', 'address', 'uint256'],
  ethers.utils.hexDataSlice(data, 4)
)
// gives: [e, ["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c", "0x08ba0619b1e7A582E0BCe5BBE9843322C954C340"], "0xC0C5eb43E2dF059e3Be6E4fb0284C283CAa59919", e] (4)

If plugging in the ABI is more convenient for you then you can use interface:

const iface = new ethers.utils.Interface(['function swapExactETHForTokens(uint256 amountOutMin, address[] path, address to, uint256 deadline)'])

iface.decodeFunctionData('swapExactETHForTokens', '0x7ff36ab50000000000000000000000000000000000000000000000bc18ba4144048bbab00000000000000000000000000000000000000000000000000000000000000080000000000000000000000000c0c5eb43e2df059e3be6e4fb0284c283caa5991900000000000000000000000000000000000000000000000000000000614d87a80000000000000000000000000000000000000000000000000000000000000002000000000000000000000000bb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c00000000000000000000000008ba0619b1e7a582e0bce5bbe9843322c954c340')
// gives: [e, ["0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c", "0x08ba0619b1e7A582E0BCe5BBE9843322C954C340"], "0xC0C5eb43E2dF059e3Be6E4fb0284C283CAa59919", e] (4)

Best Answer

Related Solutions

Ethers.js Function – Can jsonRpcProvider.getSigner() Take Any Address?

Ethers.js – How to Decode Input Data in Ethers.js

Related Topic