feat(substreams): add substreams for Uniswap v2 and v3

substreams/ethereum-uniswap-v3/src/modules/2_store_pools.rs

@@ -0,0 +1,23 @@
+use std::str;
+
+use substreams::store::{StoreNew, StoreSetIfNotExists, StoreSetIfNotExistsProto};
+
+use crate::pb::{tycho::evm::v1::BlockChanges, uniswap::v3::Pool};
+
+#[substreams::handlers::store]
+pub fn store_pools(pools_created: BlockChanges, store: StoreSetIfNotExistsProto<Pool>) {
+    // Store pools. Required so the next maps can match any event to a known pool by their address
+
+    for change in pools_created.changes {
+        for component_change in &change.component_changes {
+            let pool_address: &str = &component_change.id;
+            let pool: Pool = Pool {
+                address: hex::decode(pool_address.trim_start_matches("0x")).unwrap(),
+                token0: component_change.tokens[0].clone(),
+                token1: component_change.tokens[1].clone(),
+                created_tx_hash: change.tx.as_ref().unwrap().hash.clone(),
+            };
+            store.set_if_not_exists(0, format!("{}:{}", "Pool", pool_address), &pool);
+        }
+    }
+}