Miles

Search…
Miles
This archetype is a very basic miles management system with add and consume transactions. It may be considered as a simplified version of ERC20.
miles.arl
1
archetype miles
2
​
3
variable[%transferable%] validator : role = @tz1Lc2qBKEWCBeDU8npG6zCeCqpmaegRi6Jg
4
​
5
asset account identified by owner {
6
  owner  : role;
7
  amount : int;
8
}
9
​
10
action add (ow : role, value : int) {
11
  called by validator
12
  effect {
13
    if account.contains(ow) then
14
      account.update (ow, { amount += value })
15
    else
16
      account.add({ owner = ow; amount = 0 })
17
  }
18
}
19
​
20
action consume (ow : role, value : int) {
21
  specification {
22
    postcondition s1 {
23
      let some ba = before.account.get(ow) in
24
      let some a = account.get(ow) in
25
      ba.amount = a.amount + value
26
      otherwise true
27
      otherwise true
28
    }
29
  }
30
​
31
  called by validator
32
​
33
  require {
34
    c1 : account.get(ow).amount >= value;
35
  }
36
​
37
  effect {
38
    account.update (ow, { amount -= value })
39
  }
40
}
Copied!
Coase
Miles with expiration
Last modified 1mo ago
Export as PDF
Copy link
Edit on GitHub