# Slashing Queries

Endpoints reference:
- `provider` chain RPC: `ics-consensus.stg.earthball.xyz:26657`
- `salt` chain RPC: `ics-consensus.stg.earthball.xyz:26667`
- `pepper` chain RPC: `ics-consensus.stg.earthball.xyz:26677`

## Block results: the `slash` event

Querying for slashing events can be done via the block_results query on an RPC endpoint.

For example, if we want to query the block results at height 2204 of the provider chain:

curl -s 'http://ics-consensus.stg.earthball.xyz:26657/block_results?height=2204' | jq '.result.begin_block_events[14]'

We get the following:

{
  "type": "slash",
  "attributes": [
    {
      "key": "YWRkcmVzcw==",
      "value": "Y29zbW9zdmFsY29uczFqdnZzeDVjcG1mZnhlM3VkZXV0NTUzYThmN3E1cXk1MzU4YTdkYw==",
      "index": true
    },
    {
      "key": "cG93ZXI=",
      "value": "MQ==",
      "index": true
    },
    {
      "key": "cmVhc29u",
      "value": "bWlzc2luZ19zaWduYXR1cmU=",
      "index": true
    },
    {
      "key": "amFpbGVk",
      "value": "Y29zbW9zdmFsY29uczFqdnZzeDVjcG1mZnhlM3VkZXV0NTUzYThmN3E1cXk1MzU4YTdkYw==",
      "index": true
    }
  ]
}

The `key` and `value` keys are base64 encoded, so they must be decoded. This script is shown as reference:

`slash.py`

#!/usr/bin/env python

import json
import requests
import base64

def decode_attributes(attrs):
    attrs['key'] = base64.b64decode(attrs['key']).decode('utf-8')
    attrs['value'] = base64.b64decode(attrs['value']).decode('utf-8')

block_results_endpoint = 'http://ics-consensus.stg.earthball.xyz:26657/block_results?height='
height = 2204
block_results = (requests.get(f'{block_results_endpoint}{height}')).json()
begin_block_events = block_results['result']['begin_block_events']
slash_event = begin_block_events[14]
for attrs in slash_event['attributes']:
    decode_attributes(attrs)

print(json.dumps(slash_event))

This enables the following:

./slash.py | jq -r '.'
{
  "type": "slash",
  "attributes": [
    {
      "key": "address",
      "value": "cosmosvalcons1jvvsx5cpmffxe3udeut553a8f7q5qy5358a7dc",
      "index": true
    },
    {
      "key": "power",
      "value": "1",
      "index": true
    },
    {
      "key": "reason",
      "value": "missing_signature",
      "index": true
    },
    {
      "key": "jailed",
      "value": "cosmosvalcons1jvvsx5cpmffxe3udeut553a8f7q5qy5358a7dc",
      "index": true
    }
  ]
}

If we check the validator set at block heights 2205 and 2206, we can see that the validator with consensus address `cosmosvalcons1jvvsx5cpmffxe3udeut553a8f7q5qy5358a7dc` has been removed in height 2206 due to missing signatures. We can confirm this by looking for ``"type": "liveness"`` events in earlier blocks.

curl -s 'http://ics-consensus.stg.earthball.xyz:26657/validators?height=2205' | jq -r '.result.validators[].address'
B218725A22B9319FC8340E83601588438FEF11BD
A49DAB77379B869F28E2AA35BF4D7F07866B0C10
9319035301DA526CC78DCF174A47A74F81401291

curl -s 'http://ics-consensus.stg.earthball.xyz:26657/validators?height=2206' | jq -r '.result.validators[].address'  
B218725A22B9319FC8340E83601588438FEF11BD
A49DAB77379B869F28E2AA35BF4D7F07866B0C10

gaiad keys parse 9319035301DA526CC78DCF174A47A74F81401291
formats:
- cosmos1jvvsx5cpmffxe3udeut553a8f7q5qy539q6hd2
- cosmospub1jvvsx5cpmffxe3udeut553a8f7q5qy536xky50
- cosmosvaloper1jvvsx5cpmffxe3udeut553a8f7q5qy53q5wzpe
- cosmosvaloperpub1jvvsx5cpmffxe3udeut553a8f7q5qy53jhhpru
- cosmosvalcons1jvvsx5cpmffxe3udeut553a8f7q5qy5358a7dc
- cosmosvalconspub1jvvsx5cpmffxe3udeut553a8f7q5qy53rnvffd

The same result can be observed at heights 2573-2575 and 8011-8013.

## Consumer chain slashes

The salt chain had slash events at block height 101, but the validator set did not start updating until block height 166.

curl -s 'http://ics-consensus.stg.earthball.xyz:26667/block_results?height=101' | jq -r '.result.begin_block_events[1]' 

The pepper chain had slash events at block height 101, but the validator set did not change until block height 150.

curl -s 'http://ics-consensus.stg.earthball.xyz:26677/block_results?height=101' | jq -r '.result.begin_block_events[1]'