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solved the problem
Algorand Coding Challenge Submission
What was the bug?
The transaction wasn't signed. We had to sign it using the sender's private key before it could be sent.
How did you fix the bug?
All that I needed to do was add a line where I called signTxn() and sent in the sender's private key. It took me a while to figure out what the command was, but I ended up solving it by logging the sender object so I could see the structure of the data. Then I was stuck for a long time again because I tried to validate the transaction using the signed transaction object, so I ended up with a promise that never resolved. The docs were a little bit misleading in that regard, but maybe that is purposeful.
Console Screenshot: