area concatenation should probably be handled by the application software - also, protocol changes are proposed to areas, e.g. using polygons: whiteflagprotocol/whiteflag-standard#13;
message concatenation is only required for blockchains with limited data per transaction, which is not an issue with Ethereum as the only currently implemented blockchain.
Issue may be reopened if required.
Message and area concatenation using reference code
3
is defined in the Whiteflag protocol specification but currently not implemented in the API.