Hi,

There are some usecases where you want a computer to be able to peek
into individual transactions on the Bitcoin blockchain.

To do that, all you need is to download the chain of block headers, and
then check for the transaction via merkle root and parse its content
e.g. to see that it has a particular OP_RETURN as claimed etc. .

Is that viable to implement oneself via LibBitcoin or something that
LibBitcoin may want to implement itself?


There is a gap in the C/C++ library world today in that space.
Javascript has some libraries for that e.g.
https://github.com/bcoin-org/bcoin . In the C world, libbtc
https://github.com/libbtc/libbtc almost does it but not quite.

Thanks,
Mlmikael