Docs/readme (#12)

Readme update

.env.example

@@ -0,0 +1,12 @@
+POSTGRES_HOST=db
+POSTGRES_USER=db_user
+POSTGRES_DB=starknet_metadata
+POSTGRES_PASSWORD=
+IPFS_NODE_URI=https://ipfs.io
+IPFS_TIMEOUT=3
+GRPC_BIND=starknet-mainnet-grpc.dipdup.net:80
+NODE_URL=
+SEQUENCER_URL=https://alpha-mainnet.starknet.io/feeder_gateway
+DATASOURCE=node
+DATASOURCE_RPS=3
+MULTICALL_CONTRACT=0x001f35d1765eff5b7edf84516c100e176800c0b09ba7fac25362a39f6aa3e609

.gitignore

@@ -17,4 +17,3 @@
 # Dependency directories (remove the comment below to include it)
 vendor/
 *.csv
-.env*

README.md

@@ -1,2 +1,94 @@
-# starknet-metadata
-Metadata indexer for starknet
+# Starknet metadata indexer
+
+A DipDup Vertical component intended to indexing starknet tokens metadata
+
+## Features
+
+* Receiving metadata through IPFS and HTTP 
+* Receiving data through embedded IPFS node
+* Indexing `ERC20`, `ERC721` and `ERC1155` tokens
+
+## Public instances
+
+Public deployments with reasonable rate limits are available for testing and prototyping:
+* [Starknet metadata](https://ide.dipdup.io/?resource=starknet-metadata.dipdup.net/v1/graphql) `https://starknet-metadata.dipdup.net/v1/graphql`
+
+## Usage examples
+
+### Receiving ERC20 tokens metadata
+
+```gql
+query ERC20_token_metadata {
+    token_metadata(limit: 100, where: { type: { _eq: "erc20" } }) {
+        created_at
+        metadata
+        status
+        token_id
+        uri
+        type
+        updated_at
+        contract {
+            hash
+        }
+    }
+}
+```
+
+### Receiving certain contract tokens metadata 
+
+```gql
+query Contract_token_metadata {
+    token_metadata(
+        limit: 100
+        where: {
+            contract: {
+                hash: {
+                    _eq: "\\x01b10f6d79aa4b556a6c5a067596ca02d8dbf6566f1fbceee136bdaadd9fedc8"
+                }
+            }
+        }
+    ) {
+        metadata
+        contract {
+            hash
+        }
+        uri
+        created_at
+        token_id
+        type
+        updated_at
+    }
+}
+```
+
+### Indexer status
+To make sure the indexer works fine you can query status table
+
+```gql
+query State {
+    state {
+        last_time
+        last_height
+        name
+    }
+}
+```
+
+## Self hosted mode
+
+* Create `.env` file relying on [.env.example](https://github.com/dipdup-io/starknet-metadata/blob/master/.env.example)
+* Get Starknet node url endpoint for example on [Blast API](https://blastapi.io/public-api/starknet) and fill up `NODE_URL` variable
+* Run `docker compose up --build`
+
+## About
+
+DipDup Vertical for Starknet is a federated API including the following services:
+
+- [x] Generic Starknet indexer
+- [x] Starknet ID indexer
+- [x] Token metadata indexer
+- [ ] Starknet search engine (Q3)
+- [ ] Chain/dapp/contract analytics
+- [ ] Aggregated market data
+
+Project is supported by Starkware and Starknet Foundation via [OnlyDust platform](https://app.onlydust.com/p/dipdup)