fix(rust_indexer): Fix proxy indexer

[wcalandro]

No description provided.

[jaysachs]

I sorta wish this was 3 separate PRs:

1. hex -> base64 dependency
2. removal of path from FileProvider methods
3. the actual fix ("true" -> true)

[shahms]

Why remove path when it exists on the underlying RPC?

[wcalandro]

I sorta wish this was 3 separate PRs:

1. hex -> base64 dependency
2. removal of path from FileProvider methods
3. the actual fix ("true" -> true)

I agree that the FileProvider change could probably be broken out, but the "true" -> true change and the hex -> base64 change are both part of the fix

[wcalandro]

Why remove path when it exists on the underlying RPC?

Based on looking at other indexers that utilize the proxy interface, the precedent is to completely ignore the path argument.

[shahms]

Why remove path when it exists on the underlying RPC?

Based on looking at other indexers that utilize the proxy interface, the precedent is to completely ignore the path argument.

Right, but it exists to allow for implementations to ignore either and provide better diagnostics in either case.