fix(rust/hermes-ipfs): Fix add_ipfs_file and get_ipfs_file

[bkioshn]

Description

Fix add_ipfs_file and get_ipfs_file

Related Issue(s)

input-output-hk/hermes#736

Description of Changes

add_ipfs_file

• Creating a block using custom CID and data to store the file instead of using unixfs

get_ipfs_file

• Get a file from a block using CID instead of getting it from unixfs

• Remove
  Note : The underlying implementation of unixfs undergoes a chunking mechanism when the file is big.
  This create block doesn't handle that process and yet it is safe since the documents size is limit to ~2MB

Breaking Changes

• New implementation of add_ipfs_file and get_ipfs_file
• AddIpfsFile is removed

Related Pull Requests

input-output-hk/hermes#750

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module

[bkioshn]

CI fails here, but pass locally

[cong-or]

LGTM

[rafal-ch]

LGTM 👍
with one nit

[rafal-ch]

LGTM 👍

[bkioshn]

Might need to fix bitswap, still investigate