Batch presigned exit message review feedback

README.md

@@ -139,6 +139,22 @@ then `--mnemonic` and `--validator-seed-index` may be omitted like follows
 ```
 
 
+### Command to generate batch of presigned exit messages exit message
+
+Sometimes it may be desirable to generate batch of presigned exit messages for the
+validators created from the same mnemonic.
+
+```
+./target/debug/eth-staking-smith batch-presigned-exit-message --chain=mainnet --mnemonic='ski interest capable knee usual ugly duty exercise tattoo subway delay upper bid forget say' --epoch 305658  --seed-beacon-mapping='0:100,2:200'
+```
+
+Instead of taking single `--validator-seed-index` and `--validator-beacon-index` pair of parameter,
+it takes comma-separated mapping of validator seed index to validator beacon index in `--seed-beacon-mapping`
+parameter. Keys and values in mapping should be separated by colon, so mapping of `0:100,2:200`
+will read as follows
+
+- validator with seed index `0` with given mnemonic has index `100` on beacon chain
+- validator with seed index `1` has beacon index `200`
 
 ### Command to send VoluntaryExitMessage request to Beacon node
 

tests/e2e/batch_presigned_exit_message.rs

@@ -77,7 +77,7 @@ Command sequence to verify signature:
     "epoch": "305658",
     "validator_index": "200"
   },
-  "signature": "0x8db88aabdd8f03cebba47cf3df7dd5e06ab9a49f57fc209a00cb73c5ecdea192b6ab0c5965ad8e7b6b63b9d397be3df40ea84150f2ed13ca9e0ba382c24f583ca921ff0364f18e51444838992d628623598c7c12122ff46d
+  "signature": "0x8db88aabdd8f03cebba47cf3df7dd5e06ab9a49f57fc209a00cb73c5ecdea192b6ab0c5965ad8e7b6b63b9d397be3df40ea84150f2ed13ca9e0ba382c24f583ca921ff0364f18e51444838992d628623598c7c12122ff46da795c000ae15dd65"
 }
 
 cat offline-preparation.json