More documentation (#143)

* Dispute docs
* Cancel docs

docs/cancel.md

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+# Cancel Order
+
+## Overview
+
+All Mostro messages are [Parameterized Replaceable Events](https://github.com/nostr-protocol/nips/blob/master/01.md#kinds) and use `30078` as event `kind`, a list of standard event kinds can be found [here](https://github.com/nostr-protocol/nips#event-kinds)
+
+## Communication between users and Mostro
+
+All messages from/to Mostro should be a Nostr event [kind 4](https://github.com/nostr-protocol/nips/blob/master/04.md), the `content` field of the event should be a base64-encoded, aes-256-cbc encrypted JSON-serialized string (with no white space or line breaks) of the following structure:
+
+- `version`
+- `order_id` (optional)
+- `pubkey` (optional)
+- `action` (https://docs.rs/mostro-core/latest/mostro_core/enum.Action.html)
+- `content` (optional https://docs.rs/mostro-core/latest/mostro_core/enum.Content.html)
+
+## Cancel a pending order
+
+A use can cancel an Order created by himself and with status `Pending` sending action `Cancel`, the message will look like this:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": "npub1qqqt938cer4dvlslg04zwwf66ts8r3txp6mv79cx2498pyuqx8uq0c7qkj",
+  "action": "Cancel",
+  "content": null
+}
+```
+
+## Mostro response
+
+Mostro will send a message with action `Cancel` confirming the order was canceled, here an example of the message:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "Cancel",
+  "content": null
+}
+```
+
+## Cancel cooperatively
+
+A user can cancel an `Active` order, but will need the counterparty to agree, let's look at an example where the seller initiates a cooperative cancellation:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "Cancel",
+  "content": null
+}
+```
+
+Mostro will send this message to the seller:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "CooperativeCancelInitiatedByYou",
+  "content": null
+}
+```
+
+And this message to the buyer:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "CooperativeCancelInitiatedByPeer",
+  "content": null
+}
+```
+
+The buyer can accept the cooperative cancellation sending this message:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "Cancel",
+  "content": null
+}
+```

docs/dispute.md

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+# Disputes
+
+## Overview
+
+All Mostro messages are [Parameterized Replaceable Events](https://github.com/nostr-protocol/nips/blob/master/01.md#kinds) and use `30078` as event `kind`, a list of standard event kinds can be found [here](https://github.com/nostr-protocol/nips#event-kinds)
+
+## Communication between users and Mostro
+
+All messages from/to Mostro should be a Nostr event [kind 4](https://github.com/nostr-protocol/nips/blob/master/04.md), the `content` field of the event should be a base64-encoded, aes-256-cbc encrypted JSON-serialized string (with no white space or line breaks) of the following structure:
+
+- `version`
+- `order_id` (optional)
+- `pubkey` (optional)
+- `action` (https://docs.rs/mostro-core/latest/mostro_core/enum.Action.html)
+- `content` (optional https://docs.rs/mostro-core/latest/mostro_core/enum.Content.html)
+
+## Start a dispute
+
+A use can start a dispute in an order with status `Pending` or `FiatSent` sending action `Dispute`, here is an example where the seller initiates a dispute:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": "npub1qqqt938cer4dvlslg04zwwf66ts8r3txp6mv79cx2498pyuqx8uq0c7qkj",
+  "action": "Dispute",
+  "content": null
+}
+```
+
+## Mostro response
+
+Mostro will send this message to the seller:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "DisputeInitiatedByYou,",
+  "content": null
+}
+```
+
+And here is the message to the buyer:
+
+```json
+{
+  "version": "0",
+  "order_id": "ede61c96-4c13-4519-bf3a-dcf7f1e9d842",
+  "pubkey": null,
+  "action": "DisputeInitiatedByPeer",
+  "content": null
+}
+```