# Sending a solution transaction

Generating a solving proof for an already defined *bqTest* in solve mode (*solveModeTest*) proves that you know a *certain* solution. You will need the smart contract to verify whether this solution is valid, and grant you the credential if so. You can send a solution transaction by doing:

```js
await solveModeTest.sendSolutionTransaction( 
    signer,
    proof
)
```

Where *proof* is the result of [generating a proof](https://deenz.gitbook.io/bq-core/using-the-bqsdk/bqsdk/solve-mode/generating-proof), and *signer* is a valid [ethers.Signer](https://docs.ethers.io/v5/api/signer/), which corresponds to the account that will send the solving transaction.

Note that the account that sends the solving transaction is not necessarily the account that *receives* the credential. The recipient of the credential, also known as the *solver*, is embedded in the proof itself. This means that anyone can post someone else's proof without risk of cheating, allowing for transaction relaying to be built on top.