* Valid symbols can contain [A-Z0-9], and '.' * They must start with [A, Z] * They must end with [A, Z] * They can contain a maximum of one '.'

@return true if this is a market-issued asset; false otherwise.

* The fee for assert operations is proportional to their size, * but cheaper than a data fee because they require no storage */

Convert an asset to a textual representation with symbol, i.e. "123.45 USD"

return true if there has been a black swan, false otherwise */

* Push block "may fail" in which case every partial change is unwound. After * push block is successful the block is appended to the chain database

Helper function to get an asset object with the given amount in this asset's type

@return true if this is a lifetime member account; false otherwise.