getTransactionCount() of a contract address always return 1

[AmazingAng]

Ethers Version

5.6.9

Search Terms

getTransactionCount

Describe the Problem

getTransactionCount() of a contract address always returns 1, which should return the transaction of that contract.
For example, 0xE592427A0AEce92De3Edee1F18E0157C05861564 is a uniswap router, but getTransactionCount() of it returns 1.

Code Snippet

let nonce = await provider.getTransactionCount("0xE592427A0AEce92De3Edee1F18E0157C05861564")
    console.log(nonce);

Contract ABI

No response

Errors

No response

Environment

node.js (v12 or newer)

Environment (Other)

No response

[zemse]

The nonce (or transaction count) of an account only includes the outgoing transactions in case of EOAs and in the case of contracts, it is the contract deployments using CREATE. Note that incoming transactions do not increment nonce.

This contract did not deploy any contracts and hence its nonce should be 0, but still, it's 1 because of EIP-161, which specifies that any contracts that are created using EOA or CREATE opcode after block 2,675,000 should start with nonce as 1.

[AmazingAng]

The nonce (or transaction count) of an account only includes the outgoing transactions in case of EOAs and in the case of contracts, it is the contract deployments using CREATE. Note that incoming transactions do not increment nonce.

This contract did not deploy any contracts and hence its nonce should be 0, but still, it's 1 because of EIP-161, which specifies that any contracts that are created using EOA or CREATE opcode after block 2,675,000 should start with nonce as 1.

So how to get numbet of tx on the contract?

[zemse]

This is non-trivial because the incoming transaction info is not available on an eth node.

The way etherscan does is to scan the entire blockchain and stores everything in a database. So it's just a SQL query for them to show the incoming transactions to an address. If you do not want to create your own indexer and host a database and are looking for a database provider, you may also check out https://dune.com/home which allows executing your custom SQL queries.

[AmazingAng]

This is non-trivial because the incoming transaction info is not available on an eth node.

The way etherscan does is to scan the entire blockchain and stores everything in a database. So it's just a SQL query for them to show the incoming transactions to an address. If you do not want to create your own indexer and host a database and are looking for a database provider, you may also check out https://dune.com/home which allows executing your custom SQL queries.

Thanks zemse! It really helps. I will study more about dune and other analysis tools.