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feat(surv): update nip & use parameterized replaceable events for surv-answer
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Fernando López Guevara
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41.md
195
41.md
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NIP-XX
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NIP-41
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======
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Surveys / polls
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# Surveys / polls / quizzes
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-----------------------------------
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`draft` `optional` `require:nip-20` `author:fernandolguevara`
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`draft` `optional` `require:nip-13` `require:nip-57` `author:fernandolguevara`
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The `surv` & `surv-resp` tags enables users to have surveys/polls experiences on the network.
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The `surv` tag & `surv-answer` (kind: `30041`) enables users to have surveys/polls/quizzes experiences on the network.
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## Spec
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#### Spec
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### surv
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##### Message
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To start a survey on the network, an event with one or many 'surv' tags may be created.
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```
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tag: surv
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options:
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- <multi|single> allow others to reply with one or multiple options
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- <ttl> TTL (in seconds|timestamp) when surv expires, 0 TTL don't expire
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- [<choice>]: up to 4 choices each limited to 25 chars
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````
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```
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tag: surv-resp
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options:
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- [<choice>]: based on surv type it can have one or multi
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````
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##### Relays
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One vote per key, relays needs to discard all subsequent votes, as well as invalid requests.
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##### Invalid responses
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```json
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["OK", <event_id>, false, 'ALREADY_ANSWERED'],
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["OK", <event_id>, false, 'EXPIRED'],
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["OK", <event_id>, false, 'SINGLE_OPTION'],
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["OK", <event_id>, false, 'INVALID_OPTION', 'optionX', ...],
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{"tags":[
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["surv", "{single|multiple}", "ttl", "(label)", "option 1", "option 2", "option 3", "option 4"]
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["nonce", "1", "32"]
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["amount", "milli-satoshi value"]
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]}
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```
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#### Example
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#### tags
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- `surv`:
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- `{single|multiple}`: allow others to reply with single or multiple choice.
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- `ttl:unix-time`: when survey expires, `0` don't expire.
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- `(label):string`: if present, clients should use it as surv label.
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- `option:string`: survey options
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- `nonce`: if present, pow is mandatory for answer. ref: [13](13.md)
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- `amount`: if present, zap is mandatory for answer. ref: [57](57.md)
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### surv-answer
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To reply to a survey on the network, an event of kind `30041` is created.
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```meta
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["surv-answer", "surv-index", "option-index", ...]
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```
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```json
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 1,
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"tags": [
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["t", "hastag"],
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["surv", "<multi|single>", "<ttl>", "option 1", "option 2", "option 3"]
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],
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"content": "#hastag what is your favorite option?",
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"id": "<event-id>"
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},
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 1,
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"tags": [
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["p", "<pub-key-root>", "wss://..."],
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["e", "<event-id-root>", "wss://...", "root"],
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["t", "tag"],
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["surv-resp", "option 1", "option 2"...] // based on root event surv type it can have one or multi
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],
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"content": "hello #tag\n",
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"id": "<event-id>"
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}
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"kind": 30041,
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"tags":[
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["e", "<event-id-root>", "wss://...", "root"]
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["d", "surv-answer/{event-id-root}"]
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["surv-answer", "0", "option-index:int", "{...}"]
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["nonce", "1", "32"],
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["amount", "milli-satoshi value"],
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]
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}
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```
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at least one selected option index should present on the answer event the tag `surv-answer`
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tags:
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- `e`: `<event-id-root>` origin event.
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- `d`: the value should be an string formed using origin `event-id-root` for the survey.
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- `surv-answer`:
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- `surv-index:int`: starting at 0.
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- `option-index:int`: starting at 0.
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- `nonce`: if present, pow is mandatory for answer.
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- `amount`: if present, zap is mandatory for answer.
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## Relay and client recommendations
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- `surv` tag:
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- Should have at least `two` options.
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- The value of the `label` field should allow enough characters to express the questions.
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- The `options` items should be limited up to 4.
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- Each `option` should be 25 chars limited.
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## Examples
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### Example surv single
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```json
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 1,
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"tags": [
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["t", "hastag"],
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["surv", "single", "0", "", "option 1", "option 2", "options 3"],
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],
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"content": "#hastag what is your favorite option?",
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"id": "<event-id>"
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},
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 30041,
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"tags": [
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["e", "<event-id-root>", "wss://...", "root"],
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["t", "tag"],
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["surv-answer", "", "0"]
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],
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"content": "here my favorite option is #option1 \n",
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"id": "<event-id>"
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}
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```
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### Example surv multiple with expiration
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```json
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 1,
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"tags": [
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["t", "hastag"],
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["surv", "multiple", "1684599600"],
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["options", "option 1", "option 2", "options 3"],
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],
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"content": "#hastag what are your favorite options?",
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"id": "<event-id>"
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},
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 30041,
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"tags": [
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["e", "<event-id-root>", "wss://...", "root"],
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["t", "tag"],
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["surv-answer", "", "0", "2"]
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],
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"content": "here my favorite option is #option1 \n",
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"id": "<event-id>"
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}
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```
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### Example multiple surv
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```json
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 1,
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"tags": [
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["t", "hastag"],
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["surv", "single", "0", "surv 1?", "option 1", "option 2", "options 3"],
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["surv", "multiple", "0", "surv 2?", "option 1", "option 2", "options 3"],
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],
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"content": "#hastag Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do?",
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"id": "<event-id>"
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},
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{
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"pubkey": "<pub-key>",
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"created_at": 1000000000,
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"kind": 30041,
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"tags": [
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["e", "<event-id-root>", "wss://...", "root"],
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["surv-answer", "0", "0"]
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["surv-answer", "1", "0", "2"]
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],
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"content": "quis nostrud exercitation ullamco laboris!\n",
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"id": "<event-id>"
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}
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```
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