feat(torii-grpc): erc tokens and balances

crates/torii/core/src/types.rs

@@ -121,6 +121,27 @@ pub struct Event {
     pub executed_at: DateTime<Utc>,
     pub created_at: DateTime<Utc>,
 }
+
+#[derive(FromRow, Deserialize, Debug, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct ContractMetadata {
+    pub id: String,
+    pub contract_address: String,
+    pub name: String,
+    pub symbol: String,
+    pub decimals: u8,
+}
+
+#[derive(FromRow, Deserialize, Debug, Clone)]
+#[serde(rename_all = "camelCase")]
+pub struct Balance {
+    pub id: String,
+    pub balance: String,
+    pub account_address: String,
+    pub contract_address: String,
+    pub token_id: String,
+}
+
 #[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq)]
 pub struct Contract {
     pub address: Felt,

crates/torii/grpc/proto/types.proto

@@ -149,4 +149,18 @@ enum ComparisonOperator {
     GTE = 3;
     LT = 4;
     LTE = 5;
+}
+
+message Token {
+    string contract_address = 2;
+    string name = 3;
+    string symbol = 4;
+    uint32 decimals = 5;
+}
+
+message Balance {
+    string balance = 1;
+    string account_address = 2;
+    string contract_address = 3;
+    string token_id = 4;
 }

crates/torii/grpc/proto/world.proto

@@ -42,6 +42,20 @@ service World {
 
     // Subscribe to events
     rpc SubscribeEvents (SubscribeEventsRequest) returns (stream SubscribeEventsResponse);
+
+    // Retrieve tokens
+    rpc RetrieveTokens (RetrieveTokensRequest) returns (RetrieveTokensResponse);
+}
+
+// A request to retrieve tokens
+message RetrieveTokensRequest {
+    // The list of contract addresses to retrieve tokens for
+    repeated bytes contract_addresses = 1;
+}
+
+// A response containing tokens
+message RetrieveTokensResponse {
+    repeated types.Token tokens = 1;
 }
 
 // A request to subscribe to indexer updates.