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-- Migration number: 0000 2023-08-10T16:43:44.275Z | ||
-- Event Table | ||
CREATE TABLE IF NOT EXISTS event ( | ||
id BLOB PRIMARY KEY, -- A unique 4-byte hash representing the event. | ||
created_at INTEGER NOT NULL, -- When the event was authored. | ||
pubkey BLOB NOT NULL, -- Author's public key. | ||
kind INTEGER NOT NULL, -- Event kind/type. | ||
content TEXT NOT NULL, -- Serialized json of event object. | ||
sig BLOB NOT NULL, -- Signature | ||
deleted INTEGER NOT NULL DEFAULT 0 -- Soft delete flag, 0 = not deleted, 1 = deleted | ||
); | ||
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-- Tag Table | ||
CREATE TABLE IF NOT EXISTS tag ( | ||
id INTEGER PRIMARY KEY, -- Auto-incrementing ID for tags. | ||
event_id BLOB NOT NULL, -- Link to the event that the tag is associated with. | ||
name TEXT NOT NULL, -- The tag's name. | ||
value TEXT, -- The tag's value. | ||
FOREIGN KEY(event_id) REFERENCES event(id) ON DELETE CASCADE | ||
UNIQUE(event_id, name, value) -- Ensure that the combination is unique | ||
); | ||
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-- Indexes for faster queries | ||
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-- Index to speed up look-ups by the pubkey of an event. | ||
CREATE INDEX IF NOT EXISTS pubkey_index ON event(pubkey); | ||
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-- Index to speed up look-ups by the kind/type of an event. | ||
CREATE INDEX IF NOT EXISTS kind_index ON event(kind); | ||
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-- Index to link tags to events. | ||
CREATE INDEX IF NOT EXISTS tag_event_index ON tag(event_id); | ||
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-- Index to speed up look-ups by tag names. | ||
CREATE INDEX IF NOT EXISTS tag_name_index ON tag(name); | ||
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-- Index to speed up look-ups by tag values. | ||
CREATE INDEX IF NOT EXISTS tag_value_index ON tag(value); |
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use std::collections::HashMap; | ||
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use ::nostr::{Event, Kind, RelayMessage}; | ||
use nostr::{EventId, Tag, TagKind, Timestamp}; | ||
use serde::Deserialize; | ||
use serde_json::Value; | ||
use wasm_bindgen::prelude::JsValue; | ||
use worker::D1Database; | ||
use worker::*; | ||
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#[derive(Debug, Deserialize)] | ||
struct EventRow { | ||
id: EventId, | ||
pubkey: nostr::secp256k1::XOnlyPublicKey, | ||
created_at: Timestamp, | ||
kind: Kind, | ||
tags: Option<Vec<Tag>>, | ||
content: String, | ||
sig: nostr::secp256k1::schnorr::Signature, | ||
} | ||
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#[derive(Deserialize)] | ||
struct TagRow { | ||
event_id: EventId, | ||
name: String, | ||
value: String, | ||
} | ||
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pub async fn get_nwc_events(keys: &[String], kind: Kind, db: &D1Database) -> Result<Vec<Event>> { | ||
// Determine the event kind | ||
match kind { | ||
Kind::WalletConnectResponse => (), | ||
Kind::WalletConnectRequest => (), | ||
_ => return Ok(vec![]), // skip other event types | ||
}; | ||
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console_log!("querying for ({keys:?}) and {}", kind.as_u32()); | ||
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// Query for the events first, without the tags | ||
let placeholders: String = keys.iter().map(|_| "?").collect::<Vec<_>>().join(", "); | ||
let query_str = format!( | ||
r#" | ||
SELECT * FROM event | ||
WHERE pubkey IN ({}) AND kind = ? AND deleted = 0 | ||
"#, | ||
placeholders | ||
); | ||
let mut stmt = db.prepare(&query_str); | ||
let mut bindings = Vec::with_capacity(keys.len() + 1); // +1 for the kind afterwards | ||
for key in keys.iter() { | ||
bindings.push(JsValue::from_str(key)); | ||
} | ||
bindings.push(JsValue::from_f64(kind.as_u32() as f64)); | ||
stmt = stmt.bind(&bindings)?; | ||
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let result = stmt.all().await.map_err(|e| { | ||
console_log!("Failed to fetch nwc events: {}", e); | ||
format!("Failed to fetch nwc events: {}", e) | ||
})?; | ||
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let mut events: Vec<Event> = result | ||
.results::<Value>()? | ||
.iter() | ||
.map(|row| { | ||
let e: EventRow = serde_json::from_value(row.clone()).map_err(|e| { | ||
console_log!("failed to parse event: {}", e); | ||
worker::Error::from(format!( | ||
"Failed to deserialize event from row ({}): {}", | ||
row, e | ||
)) | ||
})?; | ||
Ok(Event { | ||
id: e.id, | ||
pubkey: e.pubkey, | ||
created_at: e.created_at, | ||
kind: e.kind, | ||
tags: e.tags.unwrap_or_default(), | ||
content: e.content, | ||
sig: e.sig, | ||
}) | ||
}) | ||
.collect::<Result<Vec<Event>>>()?; | ||
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// Now get all the tags for all the events found | ||
let event_ids: Vec<EventId> = events.iter().map(|e| e.id).collect(); | ||
let placeholders: String = event_ids.iter().map(|_| "?").collect::<Vec<_>>().join(", "); | ||
let tag_query_str = format!( | ||
r#" | ||
SELECT event_id, name, value FROM tag | ||
WHERE event_id IN ({}) | ||
ORDER BY id ASC | ||
"#, | ||
placeholders | ||
); | ||
let mut tag_stmt = db.prepare(&tag_query_str); | ||
let bindings: Vec<JsValue> = event_ids | ||
.iter() | ||
.map(|id| JsValue::from_str(&id.to_string())) | ||
.collect(); | ||
tag_stmt = tag_stmt.bind(&bindings)?; | ||
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let tag_result = tag_stmt | ||
.all() | ||
.await | ||
.map_err(|e| format!("Failed to fetch tags: {}", e))?; | ||
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let tags: Vec<TagRow> = tag_result.results::<TagRow>()?; | ||
let mut tags_map: HashMap<EventId, Vec<Tag>> = HashMap::new(); | ||
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for tag_row in tags { | ||
if let Ok(tag) = Tag::parse(vec![tag_row.name, tag_row.value]) { | ||
tags_map | ||
.entry(tag_row.event_id) | ||
.or_insert_with(Vec::new) | ||
.push(tag); | ||
} | ||
} | ||
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for event in &mut events { | ||
if let Some(tags) = tags_map.remove(&event.id) { | ||
event.tags.extend(tags); | ||
} | ||
} | ||
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// Tag ordering could screw up signature, though it shouldn't matter | ||
// for NWC messages because those should only have one tag. | ||
// Also we insert tags in order and do an ORDER BY id so it should be fine. | ||
events.retain(|event| match event.verify() { | ||
Ok(_) => true, | ||
Err(e) => { | ||
console_log!("Verification failed for event with id {}: {}", event.id, e); | ||
false | ||
} | ||
}); | ||
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Ok(events) | ||
} | ||
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pub async fn handle_nwc_event(event: Event, db: &D1Database) -> Result<Option<RelayMessage>> { | ||
// Create the main event insertion query. | ||
let event_insert_query = worker::query!( | ||
db, | ||
r#" | ||
INSERT OR IGNORE INTO event (id, created_at, pubkey, kind, content, sig) | ||
VALUES (?, ?, ?, ?, ?, ?) | ||
"#, | ||
&event.id, | ||
&event.created_at, | ||
&event.pubkey, | ||
&event.kind, | ||
&event.content, | ||
&event.sig | ||
)?; | ||
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// Create a vector of tag insertion queries. | ||
let mut tag_insert_queries: Vec<_> = event | ||
.tags | ||
.iter() | ||
.map(|tag| { | ||
worker::query!( | ||
db, | ||
r#" | ||
INSERT OR IGNORE INTO tag (event_id, name, value) | ||
VALUES (?, ?, ?) | ||
"#, | ||
&event.id, | ||
&tag.kind().to_string(), | ||
&tag.as_vec().get(1) | ||
) | ||
.expect("should compile query") | ||
}) | ||
.collect(); | ||
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// Combine the main event and tag insertion queries. | ||
let mut batch_queries = vec![event_insert_query]; | ||
batch_queries.append(&mut tag_insert_queries); | ||
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// Run the batch queries. | ||
let mut results = db.batch(batch_queries).await?.into_iter(); | ||
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// Check the result of the main event insertion. | ||
if let Some(error_msg) = results.next().and_then(|res| res.error()) { | ||
console_log!("error saving nwc event to event table: {}", error_msg); | ||
let relay_msg = RelayMessage::new_ok(event.id, false, &error_msg); | ||
return Ok(Some(relay_msg)); | ||
} | ||
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// Check the results for the tag insertions. | ||
for tag_insert_result in results { | ||
if let Some(error_msg) = tag_insert_result.error() { | ||
console_log!("error saving tag to tag table: {}", error_msg); | ||
let relay_msg = RelayMessage::new_ok(event.id, false, &error_msg); | ||
return Ok(Some(relay_msg)); | ||
} | ||
} | ||
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let relay_msg = RelayMessage::new_ok(event.id, true, ""); | ||
Ok(Some(relay_msg)) | ||
} | ||
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/// When a NWC request has been fulfilled, soft delete the request from the database | ||
pub async fn delete_nwc_request(event: Event, db: &D1Database) -> Result<()> { | ||
// Filter only relevant events | ||
match event.kind { | ||
Kind::WalletConnectResponse => (), | ||
_ => return Ok(()), // skip other event types | ||
}; | ||
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let p_tag = event.tags.iter().find(|t| t.kind() == TagKind::P).cloned(); | ||
let e_tag = event.tags.iter().find(|t| t.kind() == TagKind::E).cloned(); | ||
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if let Some(Tag::PubKey(pubkey, ..)) = p_tag { | ||
if let Some(Tag::Event(event_id, ..)) = e_tag { | ||
// Soft delete the event based on pubkey and event_id | ||
match worker::query!( | ||
db, | ||
"UPDATE event SET deleted = 1 WHERE pubkey = ? AND id = ?", | ||
&pubkey.to_string(), | ||
&event_id | ||
)? | ||
.run() | ||
.await | ||
{ | ||
Ok(_) => (), | ||
Err(e) => { | ||
console_log!("error soft deleting nwc event from database: {e}"); | ||
return Ok(()); | ||
} | ||
} | ||
} | ||
} | ||
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Ok(()) | ||
} | ||
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/// When a NWC response has been fulfilled, soft delete the response from the database | ||
pub async fn delete_nwc_response(event: &Event, db: &D1Database) -> Result<()> { | ||
// Filter only relevant events | ||
match event.kind { | ||
Kind::WalletConnectResponse => (), | ||
_ => return Ok(()), // skip other event types | ||
}; | ||
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// Soft delete the event based on pubkey and id | ||
match worker::query!( | ||
db, | ||
"UPDATE event SET deleted = 1 WHERE pubkey = ? AND id = ?", | ||
&event.pubkey.to_string(), | ||
&event.id | ||
)? | ||
.run() | ||
.await | ||
{ | ||
Ok(_) => console_log!("soft deleted nwc response event: {}", event.id), | ||
Err(e) => { | ||
console_log!("error soft deleting nwc event from database: {e}"); | ||
return Ok(()); | ||
} | ||
} | ||
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Ok(()) | ||
} |
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