Payment Engine

This is a simplistic payment processing tool that can read in a series of operations (currently via CLI), process them and spit out the accounts info.

The tool expects a file in CSV format with the header row containing type (for operation type), client (ID of the account, globally unique), tx (ID of the transaction, globally unique), and amount (with up to 4 decimal places precision). Extra white-spaces are allowed and will be trimmed.

Example of the input file content:

type,       client,  tx,  amount
deposit,    1,       1,   5.9999
deposit,    2,       2,   200.0
deposit,    1,       3,   2.9999
withdrawal, 2,       4,   150.0
deposit,    3,       5,   100.0
dispute,    3,       5,
resolve,    3,       5,
deposit,    4,       6,   100
dispute,    4,       6,
chargeback, 4,       6,

Example output (written to stdout):

client,available,held,total,locked
4,0.0,0.0,0.0,true
3,100.0,0.0,100.0,false
1,8.9997,0.0,8.9997,false
2,50.0,0.0,50.0,false

Provided your input file is called transactions.csv and is located in projects root directory, hit:

cargo run --release -- transactions.csv > accounts.csv

Please find further details and assumption we are making in the docs and comments to the process procedure, that the library crate of the projects is exposing as well as in the co-located test suite.