It would be much easier to explain how TC/C works with a real-world example. Suppose we want to transfer $1 from account A to account C. Table 2 gives a summary of how TC/C is executed in each phase.

Phase Operation A C

1 Try Balance change: -$1 Do nothing

2 Confirm Do nothing Balance change: +$1

Cancel Balance change: +$1 Do Nothing

Table 2 TC/C example

Let’s assume the wallet service is the coordinator of the TC/C. At the beginning of the distributed transaction, account A has