update readme

.env.example

@@ -1,16 +1,13 @@
 RPC_URL=
+PRIVATE_KEY=
+# Gas price in Gwei
+GAS_PRICE=200
+# should not be more often than CONFIRMATION_BLOCKS time. default is once per hour
+CRON_EXPRESSION="0 0 * * * *"
+
+
+CONFIRMATION_BLOCKS=1
 # additional nodes to send raw tx to. comma separated values
 BROADCAST_NODES=https://api.taichi.network:10001/rpc/public,https://cloudflare-eth.com
 REDIS_URL=redis://127.0.0.1:6379
-
-PRIVATE_KEY=
-
-MERKLE_TREE_LEVELS=20
-# the block of the tornadoTrees contract deployment
 INSERT_BATCH_SIZE=256
-# should not be more often than CONFIRMATION_BLOCKS time. e.g every 3 minutes
-CRON_EXPRESSION="0 */3 * * * *"
-CONFIRMATION_BLOCKS=3
-
-# a number in Gwei
-GAS_PRICE=20

README.md

@@ -23,6 +23,8 @@ redis-server
 
 yarn
 cp .env.example .env
+vi .env
+# download and unzip snark keys from https://tornado-trees-circuit.s3-eu-west-1.amazonaws.com/tornado-trees-circuit.tar.gz to `snarks` directory
 yarn start
 ```