Tools for working with Filecoin types in go-ipld-prime

[hannahhoward]

Goals

Recently, go-ipld-prime has received a number of enhancements that make it much easier to work directly with go types as IPLD nodes in the form of the bindnode package. bindnode wraps go types as IPLD nodes using reflect and IPLD schemas. bindnode also provides hooks that allow you to use custom data types in go structs you wrap as IPLD nodes. The PR provides default hooks for a few data types we've already encountered as we worked to convert go-data-transfer v2 to using pure go-ipld-prime and use it with go-fil-markets and boost. While we currently have these hooks embedded in the fil-markets and boost code (duplicated), they are useful to consumers beyond fil-markets -- namely anyone who wants to work with Filecoin types using go-ipld-prime -- either as an alternative to cbor-gen for serialization or to run selectors on Filecoin state (as possible useful example).

Implementation

• bindnode hooks for:

  • big.Int
  • abi.TokenAmount
  • crypto.Signature
  • address.Address (maybe this should live in go-address, but it starts to feel a tad disjointed)

• test to prove out roundtrip serialization with a sample type

[rvagg]

excellent!

for the record - this is pulling in code that's already being duplicated across repos, currently:

• https://github.com/filecoin-project/go-fil-markets/blob/feat/datatransfer-v2-integration/retrievalmarket/bindnodeoptions.go
• https://github.com/filecoin-project/boost/blob/feat/retrieval-query-ask-v2/retrievalmarket/types/queryaskv2.go

[arajasek]

@hannahhoward Rebase this please? Looks landable to me.

[rvagg]

rebased in #156, I don't have access to push over this