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Durable Promise Specification

Keywords

Promise, Future, Awaitable, Future Value, Write Once Register, Write Only Register, Single Assignment Container, Concurrency, Coordination

tl;dr This repository is a specification for a Durable Promise API

20 years after the launch of Amazon Web Services, building reliable and scalable cloud-based applications is a challenge even for the most seasoned developers. Developing distributed applications is a dissonant mix of idioms, patterns, and technologies, feeling fragmented and inconsistent. Yet developing traditional applications feels coherent and consistent. Developers who craft these applications have access to composable abstractions, functions & promises a.k.a async•await, and enjoy a delightful developer experience.

Even the largest traditional systems are built consistently from the smallest building blocks: functions & promises. Functions & promises are the foundational model to express concurrency and coordination. While their interpretations vary across languages and runtimes, the ideas are the same.

Promises

A promise, also called future, awaitable, or deferred is a representation of a future value. A promise is either pending or completed, that is, resolved or rejected: A promise is pending, signaling that the value is not yet available or completed, signaling success or failure.

Promise

A promise is a coordination primitive: In a typical scenario, a downstream function execution creates a promise and awaits its completion. An upstream function execution either resolves or rejects the promise. On completion, the downstream execution resumes with the value of the promise.

Promise API

Adding Durability

Recently, durable functions a.k.a durable executions have emerged as an abstraction for building distributed systems. Durable functions are functions with strong execution guarantees. Traditional, that is, volatile functions are bound to a single runtime. If the runtime crashes, any volatile function execution ceases to exist. Durable function executions are not bound to a runtime. If the runtime crashes, a durable function execution is simply rescheduled on a different runtime.

Durable promises are the counterpart to durable functions. Durable promises have identity and state that is not bound to a single runtime. Based on durable promises you can compose reliable and scalable distributed systems across heterogenous technology stacks.

Application Programming Interface (API)

Logically, the Application Programming Interface (API) is divided in two parts, the Downstream API and the Upstream API.

Downstream API

  • Create

    A downstream component may create a promise

    Create(promise-id, idempotency-key, param, header, timeout, strict=True)
    
  • Cancel

    A downstream component can cancel an existing promise

    Cancel(promise-id, idempotency-key, value, header, strict)
    

Upstream API

  • Resolve

    An upstream component can resolve an existing promise, signaling success

    Resolve(promise-id, idempotency-key, value, header, strict)
    
  • Reject

    An upstream component can reject a promise, signalling failure

    Reject(promise-id, idempotency-key, value, header, strict)
    

Idempotence

In a distributed system, managing duplicate and racing messages is essential. When creating, resolving, or rejecting a Durable Promise, use an idempotency key. An idempotency key is a client generated value which the server uses to recognize when two different physical requests represent the same logical request.

Current State Action Next State Output
1 Init Create(id, ⊥, T) Pending(id, ⊥, ⊥) OK
2 Init Create(id, ⊥, F) Pending(id, ⊥, ⊥) OK
3 Init Create(id, ikc, T) Pending(id, ikc, ⊥) OK
4 Init Create(id, ikc, F) Pending(id, ikc, ⊥) OK
5 Init Resolve(id, ⊥, T) Init KO, Already Init
6 Init Resolve(id, ⊥, F) Init KO, Already Init
7 Init Resolve(id, iku, T) Init KO, Already Init
8 Init Resolve(id, iku, F) Init KO, Already Init
9 Init Reject(id, ⊥, T) Init KO, Already Init
10 Init Reject(id, ⊥, F) Init KO, Already Init
11 Init Reject(id, iku, T) Init KO, Already Init
12 Init Reject(id, iku, F) Init KO, Already Init
13 Init Cancel(id, ⊥, T) Init KO, Already Init
14 Init Cancel(id, ⊥, F) Init KO, Already Init
15 Init Cancel(id, iku, T) Init KO, Already Init
16 Init Cancel(id, iku, F) Init KO, Already Init
17 Pending(id, ⊥, ⊥) Create(id, ⊥, T) Pending(id, ⊥, ⊥) KO, Already Pending
18 Pending(id, ⊥, ⊥) Create(id, ⊥, F) Pending(id, ⊥, ⊥) KO, Already Pending
19 Pending(id, ⊥, ⊥) Create(id, ikc, T) Pending(id, ⊥, ⊥) KO, Already Pending
20 Pending(id, ⊥, ⊥) Create(id, ikc, F) Pending(id, ⊥, ⊥) KO, Already Pending
21 Pending(id, ⊥, ⊥) Resolve(id, ⊥, T) Resolved(id, ⊥, ⊥) OK
22 Pending(id, ⊥, ⊥) Resolve(id, ⊥, F) Resolved(id, ⊥, ⊥) OK
23 Pending(id, ⊥, ⊥) Resolve(id, iku, T) Resolved(id, ⊥, iku) OK
24 Pending(id, ⊥, ⊥) Resolve(id, iku, F) Resolved(id, ⊥, iku) OK
25 Pending(id, ⊥, ⊥) Reject(id, ⊥, T) Rejected(id, ⊥, ⊥) OK
26 Pending(id, ⊥, ⊥) Reject(id, ⊥, F) Rejected(id, ⊥, ⊥) OK
27 Pending(id, ⊥, ⊥) Reject(id, iku, T) Rejected(id, ⊥, iku) OK
28 Pending(id, ⊥, ⊥) Reject(id, iku, F) Rejected(id, ⊥, iku) OK
29 Pending(id, ⊥, ⊥) Cancel(id, ⊥, T) Canceled(id, ⊥, ⊥) OK
30 Pending(id, ⊥, ⊥) Cancel(id, ⊥, F) Canceled(id, ⊥, ⊥) OK
31 Pending(id, ⊥, ⊥) Cancel(id, iku, T) Canceled(id, ⊥, iku) OK
32 Pending(id, ⊥, ⊥) Cancel(id, iku, F) Canceled(id, ⊥, iku) OK
33 Pending(id, ikc, ⊥) Create(id, ⊥, T) Pending(id, ikc, ⊥) KO, Already Pending
34 Pending(id, ikc, ⊥) Create(id, ⊥, F) Pending(id, ikc, ⊥) KO, Already Pending
35 Pending(id, ikc, ⊥) Create(id, ikc, T) Pending(id, ikc, ⊥) OK, Deduplicated
36 Pending(id, ikc, ⊥) Create(id, ikc, F) Pending(id, ikc, ⊥) OK, Deduplicated
37 Pending(id, ikc, ⊥) Create(id, ikc*, T) Pending(id, ikc, ⊥) KO, Already Pending
38 Pending(id, ikc, ⊥) Create(id, ikc*, F) Pending(id, ikc, ⊥) KO, Already Pending
39 Pending(id, ikc, ⊥) Resolve(id, ⊥, T) Resolved(id, ikc, ⊥) OK
40 Pending(id, ikc, ⊥) Resolve(id, ⊥, F) Resolved(id, ikc, ⊥) OK
41 Pending(id, ikc, ⊥) Resolve(id, iku, T) Resolved(id, ikc, iku) OK
42 Pending(id, ikc, ⊥) Resolve(id, iku, F) Resolved(id, ikc, iku) OK
43 Pending(id, ikc, ⊥) Reject(id, ⊥, T) Rejected(id, ikc, ⊥) OK
44 Pending(id, ikc, ⊥) Reject(id, ⊥, F) Rejected(id, ikc, ⊥) OK
45 Pending(id, ikc, ⊥) Reject(id, iku, T) Rejected(id, ikc, iku) OK
46 Pending(id, ikc, ⊥) Reject(id, iku, F) Rejected(id, ikc, iku) OK
47 Pending(id, ikc, ⊥) Cancel(id, ⊥, T) Canceled(id, ikc, ⊥) OK
48 Pending(id, ikc, ⊥) Cancel(id, ⊥, F) Canceled(id, ikc, ⊥) OK
49 Pending(id, ikc, ⊥) Cancel(id, iku, T) Canceled(id, ikc, iku) OK
50 Pending(id, ikc, ⊥) Cancel(id, iku, F) Canceled(id, ikc, iku) OK
51 Resolved(id, ⊥, ⊥) Create(id, ⊥, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
52 Resolved(id, ⊥, ⊥) Create(id, ⊥, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
53 Resolved(id, ⊥, ⊥) Create(id, ikc, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
54 Resolved(id, ⊥, ⊥) Create(id, ikc, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
55 Resolved(id, ⊥, ⊥) Resolve(id, ⊥, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
56 Resolved(id, ⊥, ⊥) Resolve(id, ⊥, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
57 Resolved(id, ⊥, ⊥) Resolve(id, iku, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
58 Resolved(id, ⊥, ⊥) Resolve(id, iku, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
59 Resolved(id, ⊥, ⊥) Reject(id, ⊥, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
60 Resolved(id, ⊥, ⊥) Reject(id, ⊥, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
61 Resolved(id, ⊥, ⊥) Reject(id, iku, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
62 Resolved(id, ⊥, ⊥) Reject(id, iku, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
63 Resolved(id, ⊥, ⊥) Cancel(id, ⊥, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
64 Resolved(id, ⊥, ⊥) Cancel(id, ⊥, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
65 Resolved(id, ⊥, ⊥) Cancel(id, iku, T) Resolved(id, ⊥, ⊥) KO, Already Resolved
66 Resolved(id, ⊥, ⊥) Cancel(id, iku, F) Resolved(id, ⊥, ⊥) KO, Already Resolved
67 Resolved(id, ⊥, iku) Create(id, ⊥, T) Resolved(id, ⊥, iku) KO, Already Resolved
68 Resolved(id, ⊥, iku) Create(id, ⊥, F) Resolved(id, ⊥, iku) KO, Already Resolved
69 Resolved(id, ⊥, iku) Create(id, ikc, T) Resolved(id, ⊥, iku) KO, Already Resolved
70 Resolved(id, ⊥, iku) Create(id, ikc, F) Resolved(id, ⊥, iku) KO, Already Resolved
71 Resolved(id, ⊥, iku) Resolve(id, ⊥, T) Resolved(id, ⊥, iku) KO, Already Resolved
72 Resolved(id, ⊥, iku) Resolve(id, ⊥, F) Resolved(id, ⊥, iku) KO, Already Resolved
73 Resolved(id, ⊥, iku) Resolve(id, iku, T) Resolved(id, ⊥, iku) OK, Deduplicated
74 Resolved(id, ⊥, iku) Resolve(id, iku, F) Resolved(id, ⊥, iku) OK, Deduplicated
75 Resolved(id, ⊥, iku) Resolve(id, iku*, T) Resolved(id, ⊥, iku) KO, Already Resolved
76 Resolved(id, ⊥, iku) Resolve(id, iku*, F) Resolved(id, ⊥, iku) KO, Already Resolved
77 Resolved(id, ⊥, iku) Reject(id, ⊥, T) Resolved(id, ⊥, iku) KO, Already Resolved
78 Resolved(id, ⊥, iku) Reject(id, ⊥, F) Resolved(id, ⊥, iku) KO, Already Resolved
79 Resolved(id, ⊥, iku) Reject(id, iku, T) Resolved(id, ⊥, iku) KO, Already Resolved
80 Resolved(id, ⊥, iku) Reject(id, iku, F) Resolved(id, ⊥, iku) OK, Deduplicated
81 Resolved(id, ⊥, iku) Reject(id, iku*, T) Resolved(id, ⊥, iku) KO, Already Resolved
82 Resolved(id, ⊥, iku) Reject(id, iku*, F) Resolved(id, ⊥, iku) KO, Already Resolved
83 Resolved(id, ⊥, iku) Cancel(id, ⊥, T) Resolved(id, ⊥, iku) KO, Already Resolved
84 Resolved(id, ⊥, iku) Cancel(id, ⊥, F) Resolved(id, ⊥, iku) KO, Already Resolved
85 Resolved(id, ⊥, iku) Cancel(id, iku, T) Resolved(id, ⊥, iku) KO, Already Resolved
86 Resolved(id, ⊥, iku) Cancel(id, iku, F) Resolved(id, ⊥, iku) OK, Deduplicated
87 Resolved(id, ⊥, iku) Cancel(id, iku*, T) Resolved(id, ⊥, iku) KO, Already Resolved
88 Resolved(id, ⊥, iku) Cancel(id, iku*, F) Resolved(id, ⊥, iku) KO, Already Resolved
89 Resolved(id, ikc, ⊥) Create(id, ⊥, T) Resolved(id, ikc, ⊥) KO, Already Resolved
90 Resolved(id, ikc, ⊥) Create(id, ⊥, F) Resolved(id, ikc, ⊥) KO, Already Resolved
91 Resolved(id, ikc, ⊥) Create(id, ikc, T) Resolved(id, ikc, ⊥) KO, Already Resolved
92 Resolved(id, ikc, ⊥) Create(id, ikc, F) Resolved(id, ikc, ⊥) OK, Deduplicated
93 Resolved(id, ikc, ⊥) Create(id, ikc*, T) Resolved(id, ikc, ⊥) KO, Already Resolved
94 Resolved(id, ikc, ⊥) Create(id, ikc*, F) Resolved(id, ikc, ⊥) KO, Already Resolved
95 Resolved(id, ikc, ⊥) Resolve(id, ⊥, T) Resolved(id, ikc, ⊥) KO, Already Resolved
96 Resolved(id, ikc, ⊥) Resolve(id, ⊥, F) Resolved(id, ikc, ⊥) KO, Already Resolved
97 Resolved(id, ikc, ⊥) Resolve(id, iku, T) Resolved(id, ikc, ⊥) KO, Already Resolved
98 Resolved(id, ikc, ⊥) Resolve(id, iku, F) Resolved(id, ikc, ⊥) KO, Already Resolved
99 Resolved(id, ikc, ⊥) Reject(id, ⊥, T) Resolved(id, ikc, ⊥) KO, Already Resolved
100 Resolved(id, ikc, ⊥) Reject(id, ⊥, F) Resolved(id, ikc, ⊥) KO, Already Resolved
101 Resolved(id, ikc, ⊥) Reject(id, iku, T) Resolved(id, ikc, ⊥) KO, Already Resolved
102 Resolved(id, ikc, ⊥) Reject(id, iku, F) Resolved(id, ikc, ⊥) KO, Already Resolved
103 Resolved(id, ikc, ⊥) Cancel(id, ⊥, T) Resolved(id, ikc, ⊥) KO, Already Resolved
104 Resolved(id, ikc, ⊥) Cancel(id, ⊥, F) Resolved(id, ikc, ⊥) KO, Already Resolved
105 Resolved(id, ikc, ⊥) Cancel(id, iku, T) Resolved(id, ikc, ⊥) KO, Already Resolved
106 Resolved(id, ikc, ⊥) Cancel(id, iku, F) Resolved(id, ikc, ⊥) KO, Already Resolved
107 Resolved(id, ikc, iku) Create(id, ⊥, T) Resolved(id, ikc, iku) KO, Already Resolved
108 Resolved(id, ikc, iku) Create(id, ⊥, F) Resolved(id, ikc, iku) KO, Already Resolved
109 Resolved(id, ikc, iku) Create(id, ikc, T) Resolved(id, ikc, iku) KO, Already Resolved
110 Resolved(id, ikc, iku) Create(id, ikc, F) Resolved(id, ikc, iku) OK, Deduplicated
111 Resolved(id, ikc, iku) Create(id, ikc*, T) Resolved(id, ikc, iku) KO, Already Resolved
112 Resolved(id, ikc, iku) Create(id, ikc*, F) Resolved(id, ikc, iku) KO, Already Resolved
113 Resolved(id, ikc, iku) Resolve(id, ⊥, T) Resolved(id, ikc, iku) KO, Already Resolved
114 Resolved(id, ikc, iku) Resolve(id, ⊥, F) Resolved(id, ikc, iku) KO, Already Resolved
115 Resolved(id, ikc, iku) Resolve(id, iku, T) Resolved(id, ikc, iku) OK, Deduplicated
116 Resolved(id, ikc, iku) Resolve(id, iku, F) Resolved(id, ikc, iku) OK, Deduplicated
117 Resolved(id, ikc, iku) Resolve(id, iku*, T) Resolved(id, ikc, iku) KO, Already Resolved
118 Resolved(id, ikc, iku) Resolve(id, iku*, F) Resolved(id, ikc, iku) KO, Already Resolved
119 Resolved(id, ikc, iku) Reject(id, ⊥, T) Resolved(id, ikc, iku) KO, Already Resolved
120 Resolved(id, ikc, iku) Reject(id, ⊥, F) Resolved(id, ikc, iku) KO, Already Resolved
121 Resolved(id, ikc, iku) Reject(id, iku, T) Resolved(id, ikc, iku) KO, Already Resolved
122 Resolved(id, ikc, iku) Reject(id, iku, F) Resolved(id, ikc, iku) OK, Deduplicated
123 Resolved(id, ikc, iku) Reject(id, iku*, T) Resolved(id, ikc, iku) KO, Already Resolved
124 Resolved(id, ikc, iku) Reject(id, iku*, F) Resolved(id, ikc, iku) KO, Already Resolved
125 Resolved(id, ikc, iku) Cancel(id, ⊥, T) Resolved(id, ikc, iku) KO, Already Resolved
126 Resolved(id, ikc, iku) Cancel(id, ⊥, F) Resolved(id, ikc, iku) KO, Already Resolved
127 Resolved(id, ikc, iku) Cancel(id, iku, T) Resolved(id, ikc, iku) KO, Already Resolved
128 Resolved(id, ikc, iku) Cancel(id, iku, F) Resolved(id, ikc, iku) OK, Deduplicated
129 Resolved(id, ikc, iku) Cancel(id, iku*, T) Resolved(id, ikc, iku) KO, Already Resolved
130 Resolved(id, ikc, iku) Cancel(id, iku*, F) Resolved(id, ikc, iku) KO, Already Resolved
131 Rejected(id, ⊥, ⊥) Create(id, ⊥, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
132 Rejected(id, ⊥, ⊥) Create(id, ⊥, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
133 Rejected(id, ⊥, ⊥) Create(id, ikc, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
134 Rejected(id, ⊥, ⊥) Create(id, ikc, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
135 Rejected(id, ⊥, ⊥) Resolve(id, ⊥, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
136 Rejected(id, ⊥, ⊥) Resolve(id, ⊥, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
137 Rejected(id, ⊥, ⊥) Resolve(id, iku, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
138 Rejected(id, ⊥, ⊥) Resolve(id, iku, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
139 Rejected(id, ⊥, ⊥) Reject(id, ⊥, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
140 Rejected(id, ⊥, ⊥) Reject(id, ⊥, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
141 Rejected(id, ⊥, ⊥) Reject(id, iku, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
142 Rejected(id, ⊥, ⊥) Reject(id, iku, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
143 Rejected(id, ⊥, ⊥) Cancel(id, ⊥, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
144 Rejected(id, ⊥, ⊥) Cancel(id, ⊥, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
145 Rejected(id, ⊥, ⊥) Cancel(id, iku, T) Rejected(id, ⊥, ⊥) KO, Already Rejected
146 Rejected(id, ⊥, ⊥) Cancel(id, iku, F) Rejected(id, ⊥, ⊥) KO, Already Rejected
147 Rejected(id, ⊥, iku) Create(id, ⊥, T) Rejected(id, ⊥, iku) KO, Already Rejected
148 Rejected(id, ⊥, iku) Create(id, ⊥, F) Rejected(id, ⊥, iku) KO, Already Rejected
149 Rejected(id, ⊥, iku) Create(id, ikc, T) Rejected(id, ⊥, iku) KO, Already Rejected
150 Rejected(id, ⊥, iku) Create(id, ikc, F) Rejected(id, ⊥, iku) KO, Already Rejected
151 Rejected(id, ⊥, iku) Resolve(id, ⊥, T) Rejected(id, ⊥, iku) KO, Already Rejected
152 Rejected(id, ⊥, iku) Resolve(id, ⊥, F) Rejected(id, ⊥, iku) KO, Already Rejected
153 Rejected(id, ⊥, iku) Resolve(id, iku, T) Rejected(id, ⊥, iku) KO, Already Rejected
154 Rejected(id, ⊥, iku) Resolve(id, iku, F) Rejected(id, ⊥, iku) OK, Deduplicated
155 Rejected(id, ⊥, iku) Resolve(id, iku*, T) Rejected(id, ⊥, iku) KO, Already Rejected
156 Rejected(id, ⊥, iku) Resolve(id, iku*, F) Rejected(id, ⊥, iku) KO, Already Rejected
157 Rejected(id, ⊥, iku) Reject(id, ⊥, T) Rejected(id, ⊥, iku) KO, Already Rejected
158 Rejected(id, ⊥, iku) Reject(id, ⊥, F) Rejected(id, ⊥, iku) KO, Already Rejected
159 Rejected(id, ⊥, iku) Reject(id, iku, T) Rejected(id, ⊥, iku) OK, Deduplicated
160 Rejected(id, ⊥, iku) Reject(id, iku, F) Rejected(id, ⊥, iku) OK, Deduplicated
161 Rejected(id, ⊥, iku) Reject(id, iku*, T) Rejected(id, ⊥, iku) KO, Already Rejected
162 Rejected(id, ⊥, iku) Reject(id, iku*, F) Rejected(id, ⊥, iku) KO, Already Rejected
163 Rejected(id, ⊥, iku) Cancel(id, ⊥, T) Rejected(id, ⊥, iku) KO, Already Rejected
164 Rejected(id, ⊥, iku) Cancel(id, ⊥, F) Rejected(id, ⊥, iku) KO, Already Rejected
165 Rejected(id, ⊥, iku) Cancel(id, iku, T) Rejected(id, ⊥, iku) KO, Already Rejected
166 Rejected(id, ⊥, iku) Cancel(id, iku, F) Rejected(id, ⊥, iku) OK, Deduplicated
167 Rejected(id, ⊥, iku) Cancel(id, iku*, T) Rejected(id, ⊥, iku) KO, Already Rejected
168 Rejected(id, ⊥, iku) Cancel(id, iku*, F) Rejected(id, ⊥, iku) KO, Already Rejected
169 Rejected(id, ikc, ⊥) Create(id, ⊥, T) Rejected(id, ikc, ⊥) KO, Already Rejected
170 Rejected(id, ikc, ⊥) Create(id, ⊥, F) Rejected(id, ikc, ⊥) KO, Already Rejected
171 Rejected(id, ikc, ⊥) Create(id, ikc, T) Rejected(id, ikc, ⊥) KO, Already Rejected
172 Rejected(id, ikc, ⊥) Create(id, ikc, F) Rejected(id, ikc, ⊥) OK, Deduplicated
173 Rejected(id, ikc, ⊥) Create(id, ikc*, T) Rejected(id, ikc, ⊥) KO, Already Rejected
174 Rejected(id, ikc, ⊥) Create(id, ikc*, F) Rejected(id, ikc, ⊥) KO, Already Rejected
175 Rejected(id, ikc, ⊥) Resolve(id, ⊥, T) Rejected(id, ikc, ⊥) KO, Already Rejected
176 Rejected(id, ikc, ⊥) Resolve(id, ⊥, F) Rejected(id, ikc, ⊥) KO, Already Rejected
177 Rejected(id, ikc, ⊥) Resolve(id, iku, T) Rejected(id, ikc, ⊥) KO, Already Rejected
178 Rejected(id, ikc, ⊥) Resolve(id, iku, F) Rejected(id, ikc, ⊥) KO, Already Rejected
179 Rejected(id, ikc, ⊥) Reject(id, ⊥, T) Rejected(id, ikc, ⊥) KO, Already Rejected
180 Rejected(id, ikc, ⊥) Reject(id, ⊥, F) Rejected(id, ikc, ⊥) KO, Already Rejected
181 Rejected(id, ikc, ⊥) Reject(id, iku, T) Rejected(id, ikc, ⊥) KO, Already Rejected
182 Rejected(id, ikc, ⊥) Reject(id, iku, F) Rejected(id, ikc, ⊥) KO, Already Rejected
183 Rejected(id, ikc, ⊥) Cancel(id, ⊥, T) Rejected(id, ikc, ⊥) KO, Already Rejected
184 Rejected(id, ikc, ⊥) Cancel(id, ⊥, F) Rejected(id, ikc, ⊥) KO, Already Rejected
185 Rejected(id, ikc, ⊥) Cancel(id, iku, T) Rejected(id, ikc, ⊥) KO, Already Rejected
186 Rejected(id, ikc, ⊥) Cancel(id, iku, F) Rejected(id, ikc, ⊥) KO, Already Rejected
187 Rejected(id, ikc, iku) Create(id, ⊥, T) Rejected(id, ikc, iku) KO, Already Rejected
188 Rejected(id, ikc, iku) Create(id, ⊥, F) Rejected(id, ikc, iku) KO, Already Rejected
189 Rejected(id, ikc, iku) Create(id, ikc, T) Rejected(id, ikc, iku) KO, Already Rejected
190 Rejected(id, ikc, iku) Create(id, ikc, F) Rejected(id, ikc, iku) OK, Deduplicated
191 Rejected(id, ikc, iku) Create(id, ikc*, T) Rejected(id, ikc, iku) KO, Already Rejected
192 Rejected(id, ikc, iku) Create(id, ikc*, F) Rejected(id, ikc, iku) KO, Already Rejected
193 Rejected(id, ikc, iku) Resolve(id, ⊥, T) Rejected(id, ikc, iku) KO, Already Rejected
194 Rejected(id, ikc, iku) Resolve(id, ⊥, F) Rejected(id, ikc, iku) KO, Already Rejected
195 Rejected(id, ikc, iku) Resolve(id, iku, T) Rejected(id, ikc, iku) KO, Already Rejected
196 Rejected(id, ikc, iku) Resolve(id, iku, F) Rejected(id, ikc, iku) OK, Deduplicated
197 Rejected(id, ikc, iku) Resolve(id, iku*, T) Rejected(id, ikc, iku) KO, Already Rejected
198 Rejected(id, ikc, iku) Resolve(id, iku*, F) Rejected(id, ikc, iku) KO, Already Rejected
199 Rejected(id, ikc, iku) Reject(id, ⊥, T) Rejected(id, ikc, iku) KO, Already Rejected
200 Rejected(id, ikc, iku) Reject(id, ⊥, F) Rejected(id, ikc, iku) KO, Already Rejected
201 Rejected(id, ikc, iku) Reject(id, iku, T) Rejected(id, ikc, iku) OK, Deduplicated
202 Rejected(id, ikc, iku) Reject(id, iku, F) Rejected(id, ikc, iku) OK, Deduplicated
203 Rejected(id, ikc, iku) Reject(id, iku*, T) Rejected(id, ikc, iku) KO, Already Rejected
204 Rejected(id, ikc, iku) Reject(id, iku*, F) Rejected(id, ikc, iku) KO, Already Rejected
205 Rejected(id, ikc, iku) Cancel(id, ⊥, T) Rejected(id, ikc, iku) KO, Already Rejected
206 Rejected(id, ikc, iku) Cancel(id, ⊥, F) Rejected(id, ikc, iku) KO, Already Rejected
207 Rejected(id, ikc, iku) Cancel(id, iku, T) Rejected(id, ikc, iku) KO, Already Rejected
208 Rejected(id, ikc, iku) Cancel(id, iku, F) Rejected(id, ikc, iku) OK, Deduplicated
209 Rejected(id, ikc, iku) Cancel(id, iku*, T) Rejected(id, ikc, iku) KO, Already Rejected
210 Rejected(id, ikc, iku) Cancel(id, iku*, F) Rejected(id, ikc, iku) KO, Already Rejected
211 Canceled(id, ⊥, ⊥) Create(id, ⊥, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
212 Canceled(id, ⊥, ⊥) Create(id, ⊥, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
213 Canceled(id, ⊥, ⊥) Create(id, ikc, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
214 Canceled(id, ⊥, ⊥) Create(id, ikc, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
215 Canceled(id, ⊥, ⊥) Resolve(id, ⊥, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
216 Canceled(id, ⊥, ⊥) Resolve(id, ⊥, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
217 Canceled(id, ⊥, ⊥) Resolve(id, iku, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
218 Canceled(id, ⊥, ⊥) Resolve(id, iku, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
219 Canceled(id, ⊥, ⊥) Reject(id, ⊥, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
220 Canceled(id, ⊥, ⊥) Reject(id, ⊥, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
221 Canceled(id, ⊥, ⊥) Reject(id, iku, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
222 Canceled(id, ⊥, ⊥) Reject(id, iku, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
223 Canceled(id, ⊥, ⊥) Cancel(id, ⊥, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
224 Canceled(id, ⊥, ⊥) Cancel(id, ⊥, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
225 Canceled(id, ⊥, ⊥) Cancel(id, iku, T) Canceled(id, ⊥, ⊥) KO, Already Canceled
226 Canceled(id, ⊥, ⊥) Cancel(id, iku, F) Canceled(id, ⊥, ⊥) KO, Already Canceled
227 Canceled(id, ⊥, iku) Create(id, ⊥, T) Canceled(id, ⊥, iku) KO, Already Canceled
228 Canceled(id, ⊥, iku) Create(id, ⊥, F) Canceled(id, ⊥, iku) KO, Already Canceled
229 Canceled(id, ⊥, iku) Create(id, ikc, T) Canceled(id, ⊥, iku) KO, Already Canceled
230 Canceled(id, ⊥, iku) Create(id, ikc, F) Canceled(id, ⊥, iku) KO, Already Canceled
231 Canceled(id, ⊥, iku) Resolve(id, ⊥, T) Canceled(id, ⊥, iku) KO, Already Canceled
232 Canceled(id, ⊥, iku) Resolve(id, ⊥, F) Canceled(id, ⊥, iku) KO, Already Canceled
233 Canceled(id, ⊥, iku) Resolve(id, iku, T) Canceled(id, ⊥, iku) KO, Already Canceled
234 Canceled(id, ⊥, iku) Resolve(id, iku, F) Canceled(id, ⊥, iku) OK, Deduplicated
235 Canceled(id, ⊥, iku) Resolve(id, iku*, T) Canceled(id, ⊥, iku) KO, Already Canceled
236 Canceled(id, ⊥, iku) Resolve(id, iku*, F) Canceled(id, ⊥, iku) KO, Already Canceled
237 Canceled(id, ⊥, iku) Reject(id, ⊥, T) Canceled(id, ⊥, iku) KO, Already Canceled
238 Canceled(id, ⊥, iku) Reject(id, ⊥, F) Canceled(id, ⊥, iku) KO, Already Canceled
239 Canceled(id, ⊥, iku) Reject(id, iku, T) Canceled(id, ⊥, iku) KO, Already Canceled
240 Canceled(id, ⊥, iku) Reject(id, iku, F) Canceled(id, ⊥, iku) OK, Deduplicated
241 Canceled(id, ⊥, iku) Reject(id, iku*, T) Canceled(id, ⊥, iku) KO, Already Canceled
242 Canceled(id, ⊥, iku) Reject(id, iku*, F) Canceled(id, ⊥, iku) KO, Already Canceled
243 Canceled(id, ⊥, iku) Cancel(id, ⊥, T) Canceled(id, ⊥, iku) KO, Already Canceled
244 Canceled(id, ⊥, iku) Cancel(id, ⊥, F) Canceled(id, ⊥, iku) KO, Already Canceled
245 Canceled(id, ⊥, iku) Cancel(id, iku, T) Canceled(id, ⊥, iku) OK, Deduplicated
246 Canceled(id, ⊥, iku) Cancel(id, iku, F) Canceled(id, ⊥, iku) OK, Deduplicated
247 Canceled(id, ⊥, iku) Cancel(id, iku*, T) Canceled(id, ⊥, iku) KO, Already Canceled
248 Canceled(id, ⊥, iku) Cancel(id, iku*, F) Canceled(id, ⊥, iku) KO, Already Canceled
249 Canceled(id, ikc, ⊥) Create(id, ⊥, T) Canceled(id, ikc, ⊥) KO, Already Canceled
250 Canceled(id, ikc, ⊥) Create(id, ⊥, F) Canceled(id, ikc, ⊥) KO, Already Canceled
251 Canceled(id, ikc, ⊥) Create(id, ikc, T) Canceled(id, ikc, ⊥) KO, Already Canceled
252 Canceled(id, ikc, ⊥) Create(id, ikc, F) Canceled(id, ikc, ⊥) OK, Deduplicated
253 Canceled(id, ikc, ⊥) Create(id, ikc*, T) Canceled(id, ikc, ⊥) KO, Already Canceled
254 Canceled(id, ikc, ⊥) Create(id, ikc*, F) Canceled(id, ikc, ⊥) KO, Already Canceled
255 Canceled(id, ikc, ⊥) Resolve(id, ⊥, T) Canceled(id, ikc, ⊥) KO, Already Canceled
256 Canceled(id, ikc, ⊥) Resolve(id, ⊥, F) Canceled(id, ikc, ⊥) KO, Already Canceled
257 Canceled(id, ikc, ⊥) Resolve(id, iku, T) Canceled(id, ikc, ⊥) KO, Already Canceled
258 Canceled(id, ikc, ⊥) Resolve(id, iku, F) Canceled(id, ikc, ⊥) KO, Already Canceled
259 Canceled(id, ikc, ⊥) Reject(id, ⊥, T) Canceled(id, ikc, ⊥) KO, Already Canceled
260 Canceled(id, ikc, ⊥) Reject(id, ⊥, F) Canceled(id, ikc, ⊥) KO, Already Canceled
261 Canceled(id, ikc, ⊥) Reject(id, iku, T) Canceled(id, ikc, ⊥) KO, Already Canceled
262 Canceled(id, ikc, ⊥) Reject(id, iku, F) Canceled(id, ikc, ⊥) KO, Already Canceled
263 Canceled(id, ikc, ⊥) Cancel(id, ⊥, T) Canceled(id, ikc, ⊥) KO, Already Canceled
264 Canceled(id, ikc, ⊥) Cancel(id, ⊥, F) Canceled(id, ikc, ⊥) KO, Already Canceled
265 Canceled(id, ikc, ⊥) Cancel(id, iku, T) Canceled(id, ikc, ⊥) KO, Already Canceled
266 Canceled(id, ikc, ⊥) Cancel(id, iku, F) Canceled(id, ikc, ⊥) KO, Already Canceled
267 Canceled(id, ikc, iku) Create(id, ⊥, T) Canceled(id, ikc, iku) KO, Already Canceled
268 Canceled(id, ikc, iku) Create(id, ⊥, F) Canceled(id, ikc, iku) KO, Already Canceled
269 Canceled(id, ikc, iku) Create(id, ikc, T) Canceled(id, ikc, iku) KO, Already Canceled
270 Canceled(id, ikc, iku) Create(id, ikc, F) Canceled(id, ikc, iku) OK, Deduplicated
271 Canceled(id, ikc, iku) Create(id, ikc*, T) Canceled(id, ikc, iku) KO, Already Canceled
272 Canceled(id, ikc, iku) Create(id, ikc*, F) Canceled(id, ikc, iku) KO, Already Canceled
273 Canceled(id, ikc, iku) Resolve(id, ⊥, T) Canceled(id, ikc, iku) KO, Already Canceled
274 Canceled(id, ikc, iku) Resolve(id, ⊥, F) Canceled(id, ikc, iku) KO, Already Canceled
275 Canceled(id, ikc, iku) Resolve(id, iku, T) Canceled(id, ikc, iku) KO, Already Canceled
276 Canceled(id, ikc, iku) Resolve(id, iku, F) Canceled(id, ikc, iku) OK, Deduplicated
277 Canceled(id, ikc, iku) Resolve(id, iku*, T) Canceled(id, ikc, iku) KO, Already Canceled
278 Canceled(id, ikc, iku) Resolve(id, iku*, F) Canceled(id, ikc, iku) KO, Already Canceled
279 Canceled(id, ikc, iku) Reject(id, ⊥, T) Canceled(id, ikc, iku) KO, Already Canceled
280 Canceled(id, ikc, iku) Reject(id, ⊥, F) Canceled(id, ikc, iku) KO, Already Canceled
281 Canceled(id, ikc, iku) Reject(id, iku, T) Canceled(id, ikc, iku) KO, Already Canceled
282 Canceled(id, ikc, iku) Reject(id, iku, F) Canceled(id, ikc, iku) OK, Deduplicated
283 Canceled(id, ikc, iku) Reject(id, iku*, T) Canceled(id, ikc, iku) KO, Already Canceled
284 Canceled(id, ikc, iku) Reject(id, iku*, F) Canceled(id, ikc, iku) KO, Already Canceled
285 Canceled(id, ikc, iku) Cancel(id, ⊥, T) Canceled(id, ikc, iku) KO, Already Canceled
286 Canceled(id, ikc, iku) Cancel(id, ⊥, F) Canceled(id, ikc, iku) KO, Already Canceled
287 Canceled(id, ikc, iku) Cancel(id, iku, T) Canceled(id, ikc, iku) OK, Deduplicated
288 Canceled(id, ikc, iku) Cancel(id, iku, F) Canceled(id, ikc, iku) OK, Deduplicated
289 Canceled(id, ikc, iku) Cancel(id, iku*, T) Canceled(id, ikc, iku) KO, Already Canceled
290 Canceled(id, ikc, iku) Cancel(id, iku*, F) Canceled(id, ikc, iku) KO, Already Canceled
291 Timedout(id, ⊥, ⊥) Create(id, ⊥, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
292 Timedout(id, ⊥, ⊥) Create(id, ⊥, F) Timedout(id, ⊥, ⊥) KO, Already Timedout
293 Timedout(id, ⊥, ⊥) Create(id, ikc, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
294 Timedout(id, ⊥, ⊥) Create(id, ikc, F) Timedout(id, ⊥, ⊥) KO, Already Timedout
295 Timedout(id, ⊥, ⊥) Resolve(id, ⊥, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
296 Timedout(id, ⊥, ⊥) Resolve(id, ⊥, F) Timedout(id, ⊥, ⊥) OK, Deduplicated
297 Timedout(id, ⊥, ⊥) Resolve(id, iku, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
298 Timedout(id, ⊥, ⊥) Resolve(id, iku, F) Timedout(id, ⊥, ⊥) OK, Deduplicated
299 Timedout(id, ⊥, ⊥) Reject(id, ⊥, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
300 Timedout(id, ⊥, ⊥) Reject(id, ⊥, F) Timedout(id, ⊥, ⊥) OK, Deduplicated
301 Timedout(id, ⊥, ⊥) Reject(id, iku, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
302 Timedout(id, ⊥, ⊥) Reject(id, iku, F) Timedout(id, ⊥, ⊥) OK, Deduplicated
303 Timedout(id, ⊥, ⊥) Cancel(id, ⊥, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
304 Timedout(id, ⊥, ⊥) Cancel(id, ⊥, F) Timedout(id, ⊥, ⊥) OK, Deduplicated
305 Timedout(id, ⊥, ⊥) Cancel(id, iku, T) Timedout(id, ⊥, ⊥) KO, Already Timedout
306 Timedout(id, ⊥, ⊥) Cancel(id, iku, F) Timedout(id, ⊥, ⊥) OK, Deduplicated
307 Timedout(id, ikc, ⊥) Create(id, ⊥, T) Timedout(id, ikc, ⊥) KO, Already Timedout
308 Timedout(id, ikc, ⊥) Create(id, ⊥, F) Timedout(id, ikc, ⊥) KO, Already Timedout
309 Timedout(id, ikc, ⊥) Create(id, ikc, T) Timedout(id, ikc, ⊥) KO, Already Timedout
310 Timedout(id, ikc, ⊥) Create(id, ikc, F) Timedout(id, ikc, ⊥) OK, Deduplicated
311 Timedout(id, ikc, ⊥) Create(id, ikc*, T) Timedout(id, ikc, ⊥) KO, Already Timedout
312 Timedout(id, ikc, ⊥) Create(id, ikc*, F) Timedout(id, ikc, ⊥) KO, Already Timedout
313 Timedout(id, ikc, ⊥) Resolve(id, ⊥, T) Timedout(id, ikc, ⊥) KO, Already Timedout
314 Timedout(id, ikc, ⊥) Resolve(id, ⊥, F) Timedout(id, ikc, ⊥) OK, Deduplicated
315 Timedout(id, ikc, ⊥) Resolve(id, iku, T) Timedout(id, ikc, ⊥) KO, Already Timedout
316 Timedout(id, ikc, ⊥) Resolve(id, iku, F) Timedout(id, ikc, ⊥) OK, Deduplicated
317 Timedout(id, ikc, ⊥) Reject(id, ⊥, T) Timedout(id, ikc, ⊥) KO, Already Timedout
318 Timedout(id, ikc, ⊥) Reject(id, ⊥, F) Timedout(id, ikc, ⊥) OK, Deduplicated
319 Timedout(id, ikc, ⊥) Reject(id, iku, T) Timedout(id, ikc, ⊥) KO, Already Timedout
320 Timedout(id, ikc, ⊥) Reject(id, iku, F) Timedout(id, ikc, ⊥) OK, Deduplicated
321 Timedout(id, ikc, ⊥) Cancel(id, ⊥, T) Timedout(id, ikc, ⊥) KO, Already Timedout
322 Timedout(id, ikc, ⊥) Cancel(id, ⊥, F) Timedout(id, ikc, ⊥) OK, Deduplicated
323 Timedout(id, ikc, ⊥) Cancel(id, iku, T) Timedout(id, ikc, ⊥) KO, Already Timedout
324 Timedout(id, ikc, ⊥) Cancel(id, iku, F) Timedout(id, ikc, ⊥) OK, Deduplicated