Support new transaction types (three new transfer types)

[abizjak]

Three new transaction types will be added as part of the R2 release. The block explorer must be updated to support them.

• [ ] Support displaying new transfer types. The metadata should be displayed in a reasonably nice way. The metadata should be assumed to be in CBOR format, and attempt to be decoded. If decoding leads to a string, number, or byte array that should be displayed nicely, otherwise try to decode to JSON and display that nicely. As a fallback the metadata bytestring should be displayed as is without any decoding.

Related

• https://github.com/Concordium/concordium-node/milestone/1

[abizjak]

After consideration, do not bother with byte arrays separately. They cannot be displayed any better than hex anyhow.