interesting project. just some thoughts that i wanted to share:
first of all as far as i know and the wiki says, "Transaction expiration"[1] is never going to happen. in other words when you send a transaction it will stay out there for ever, most probably.
i currently have a transaction with zero fees that is out there for more than 1.5 month
also on top of that the maximum mempool expiry time was increased to 2 weeks [2] so transaction aren't going to be forgotten that easily.
also why did you choose 6 hours
[1] https://en.bitcoin.it/wiki/Transaction_expiration
[2] https://github.com/bitcoin/bitcoin/commit/a72f76ca3d5d2f259d308f65810891389f728e9e
first of all as far as i know and the wiki says, "Transaction expiration"[1] is never going to happen. in other words when you send a transaction it will stay out there for ever, most probably.
i currently have a transaction with zero fees that is out there for more than 1.5 month
also on top of that the maximum mempool expiry time was increased to 2 weeks [2] so transaction aren't going to be forgotten that easily.
also why did you choose 6 hours
[1] https://en.bitcoin.it/wiki/Transaction_expiration
[2] https://github.com/bitcoin/bitcoin/commit/a72f76ca3d5d2f259d308f65810891389f728e9e