What is the maximum number of decimal places that can be stored in an asset?

Question

When creating new eosio::asset objects, what is the maximum precision that can be stored in the asset?

Answer 1

In nodeos, eosio::chain::symbol only accepts decimals under 18 digits, but eosio::symbol in CDT doesn't check its precision. Of course, during [de]serialization, the inner value of symbol is managed by eosio::chain::symbol, so error occurs, but if you instantiate symbol or asset in contract, it can have more that 18 digits. I think eosio::symbol::is_valid needs to check maximum decimal digits to keep consistency with nodeos-side symbol struct. (I sent PR about this issue)

https://github.com/EOSIO/eosio.cdt/pull/553