The script takes a long time to run

[epiccurious]

The script takes a long time to run

[epiccurious]

This will be more challenging than expected because a block's time is not always after the previous block.

Will need to run the binary search on mediantime. But that will give the wrong block. So then maybe jump back 15 or so blocks and do a linear search again.

https://bitcoin.stackexchange.com/questions/67618/difference-between-time-and-mediantime-in-getblock#67622

[epiccurious]

## Set the target time
target_time=1234567890

## The target time should always be greater than or equal to the lower bound's mediantime
lower_bound="0"
## Find the hash of the lower bound
lower_bound_hash=$(bitcoin-cli getblockhash $lower_bound)
## Find the mediantime of the lower bound
lower_bound_mediantime=$(bitcoin-cli getblockheader $lower_bound_hash | jq '.mediantime')

## The target time should always be less than the upper bound's mediantime
upper_bound=$block_count
## Find the hash of the upper bound
upper_bound_hash=$(bitcoin-cli getblockhash $upper_bound)
## Find the mediantime of the upper bound
upper_bound_mediantime=$(bitcoin-cli getblockheader $upper_bound_hash | jq '.mediantime')

## NEED TO ADD A CHECK HERE.
## IF THE TARGET_TIME IS OUTSIDE OF THE TWO BOUNDS PRINT A CUSTOM ERROR CODE AND EXIT 1.

while [ $(($upper_bound-$lower_bound)) -gt 1 ]
do
  ## The midpoint is the average of the two
  midpoint=$((($upper_bound+$lower_bound)/2))
  ## Need to figure out how to convert to an integer (i.e. drop the 0.5 from results). There are no fractional blocks.

  ## Find the hash of the midpoint block
  midpoint_hash=$(bitcoin-cli getblockhash $midpoint)

  ## Find the mediantime of the midpoint block
  midpoint_mediantime=$(bitcoin-cli getblockheader $midpoint_hash | jq '.mediantime')

  echo "Block $midpoint has a median time of $midpoint_mediantime."
  
  ## If the lower_bound rules apply (target time >= mediantime), then the midpoint is the new lower bound.
  ## If the upper_bound rules apply (target_time < mediantime), then the midpoint is the new upper bound.
  if [ $target_time -ge $midpoint_mediantime ]
  then
    echo "Setting the new lower bound."
    lower_bound=$midpoint
    lower_bound_hash=$midpoint_hash
    lower_bound_mediantime=$midpoint_mediantime
  else
    echo "Setting the new upper bound."
    upper_bound=$midpoint
    upper_bound_hash=$midpoint_hash
    upper_bound_mediantime=$midpoint_mediantime
  fi

done

[epiccurious]

This code hasn't been tested and is probably buggy. Need to test this code on a fully synced node before publishing.

[epiccurious]

A synced node will take me a few days. This issue is on hold until then.