Get working pool on testnet about oracle-core

[greenhat]

Yes, null vs [] is the first thing that caught my eye. Besides that, the node is expecting tokens encoded as tuples - https://github.com/ScorexFoundation/sigmastate-interpreter/blob/c59139b3e5718362937817f42302b86dc2174f58/sigmastate/src/main/scala/org/ergoplatform/JsonCodecs.scala#L355

I'm going to fix it ASAP.

[kettlebell]

I think in scala, the ergo node treats the tokens as a Coll, which can be empty (https://github.com/ScorexFoundation/sigmastate-interpreter/blob/c59139b3e5718362937817f42302b86dc2174f58/sigmastate/src/main/scala/org/ergoplatform/ErgoBox.scala#L54)? Whereas in sigma-rust, ErgoBoxCandidate::tokens is of type Option<BoundedVec<1,255..>>, so no tokens means this field is None, which is encoded as null in JSON.

[greenhat]

Ha! After all, a token tuple is encoded as a dictionary - https://github.com/ScorexFoundation/sigmastate-interpreter/blob/c59139b3e5718362937817f42302b86dc2174f58/sigmastate/src/main/scala/org/ergoplatform/JsonCodecs.scala#L79-L91
So, it's only null vs [] then.

[kettlebell]

Close since more progress described in #61