Store amounts as strings

[4miners]

All LSK values like balances, fees, amounts in transactions, etc. should be stored as strings in JS and never casted/converted to numbers - in entire application. Calculations should be done via BigNumber, database layer is not affected (we use BIGINT there).

[vitaly-t]

This needs to be updated with the list of cases where such conversion happens, or else the scope of work/problem is unclear.

[ManuGowda]

Reference of all the colum names associated with money in database:
Column | Type | Modifiers

blocks:
 totalAmount          | bigint                | not null
 totalFee             | bigint                | not null
 reward               | bigint                | not null

blocks_list:
 b_totalAmount          | bigint                |
 b_totalFee             | bigint                |
 b_reward               | bigint                |

full_blocks_list:
b_totalAmount          | bigint                 |
 b_totalFee             | bigint                 |
 b_reward               | bigint                 |
 t_amount               | bigint                 |
 t_fee                  | bigint                 |

mem_accounts:
 balance           | bigint                | default 0
 u_balance         | bigint                | default 0
 fees              | bigint                | default 0
 rewards           | bigint                | default 0

mem_round:
 amount   | bigint                |

rounds_rewards:
 fees      | bigint  | not null
 reward    | bigint  | not null

trs:
 amount             | bigint                | not null
 fee                | bigint                | not null

trs_list:
 t_amount             | bigint                |
 t_fee                | bigint                |

[diego-G]

FYI @ManuGowda , here it is the database model as a html page. I hang it up in the wall behind my desk since ages.
https://drive.google.com/open?id=1P7Z4oTBI2VJCzY4kDnAiB4C98QISt4Y-