Returns the height of the peaks in the mmr, presented by a bitmap.
for example, for a mmr with 11 leaves, the mmr_size is 19, it will return 0b1011.
0b1011 indicates that the left peaks are at height 0, 1 and 3.
14
/
6 13
/ \ /
2 5 9 12 17
/ \ / \ / \ / \ /
0 1 3 4 7 8 10 11 15 16 18
Returns the pos of the peaks in the mmr.
for example, for a mmr with 11 leaves, the mmr_size is 19, it will return [14, 17, 18].
14
/
6 13
/ \ /
2 5 9 12 17
/ \ / \ / \ / \ /
0 1 3 4 7 8 10 11 15 16 18