I attempted to transfer some BTC from a local wallet to my Coinbase wallet on December 16. The transaction has been pending since that time--it has been three weeks, and still it has not been confirmed.
I think I figured out the reason, which is that I did not include a big enough fee in the transaction. But is there any way I can resolve this at this point? I've read that if a transaction isn't confirmed within 72 hours, it will just automatically cancel, but it's been three weeks and it's still pending!
Bitcoin transactions never expire. They may disappear from the mempool, but that's not a thing to rely on. For more information, please see https://en.bitcoin.it/wiki/Transaction_expiration.I think I figured out the reason, which is that I did not include a big enough fee in the transaction. But is there any way I can resolve this at this point? I've read that if a transaction isn't confirmed within 72 hours, it will just automatically cancel, but it's been three weeks and it's still pending!
As for what to do about your stuck transaction, perhaps you could use RBF or CPFP, or try one or more accelerators? Please see https://bitcointalksearch.org/topic/all-about-stuck-transactions-and-what-you-can-do-to-fix-them-1802212.
Thanks!