Rosetta deprecate token initial balance workaround

[xin-hedera]

Problem

As reported in this ticket, rosetta-cli will fail if an account has a newly associated token with non-zero balance in the current block as the tool expects a 0 balance of the token set in the previous block.

As a workaround, hedera rosetta server implementation always hides the latest block and report 0 balance of such a token in the block before the initial token account association. The cost is an extra 2 secs delay.

rosetta-sdk-go v0.7.2 fixed the issue and hedera rosetta server should deprecate the workaround

Solution

Always return the latest block in db and remove the reporting 0 token balance before token-association block workaround.

Alternatives

Leave it as is