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Block Data (v0.38.x)

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URL: https://nuvalabs.com/ License: Apache 2.0

Overview

The Node RPC endpoints are intended for working with the blockchain consensus layer directly. These endpoints return information about the blocks, validators, and network layer itself while the API endpoints work at a higher level and are used to return information at the blockchain Application layer.

The RPC service would typically be used by users and applications that wish to retrieve information about raw blocks being produced or monitor for transactions and network activity.

The Node RPC service supports the following communication protocols:

  • URI over HTTP
  • JSONRPC over HTTP
  • JSONRPC over websockets

Authentication

A bearer token is required for all requests.

Exchange client id and client secret for a token:

curl -XPOST https://dev-v6yakh57b7z3ngqo.us.auth0.com/oauth/token \
-H \"content-type: application/json\" \
-d '{\"client_id\":\"<id>\",\"client_secret\":\"<secret>\",\"audience\":\"https://api.provlabs.com\",\"grant_type\":\"client_credentials\"}'

The returned token can then be used to make API calls:

curl -XGET -H \"Authorization: Bearer <token>\" https://pio-mainnet-1-rpc.provlabs.com/block?height=5

Arguments

Arguments which expect strings or byte arrays may be passed as quoted strings, like "abc" or as 0x-prefixed strings, like 0x616263.

URI/HTTP

A REST like interface.

curl https://pio-mainnet-1-rpc.provlabs.com/block?height=5

JSONRPC/HTTP

JSONRPC requests can be POST'd to the root RPC endpoint via HTTP.

curl --header "Content-Type: application/json" --request POST --data '{"method": "block", "params": ["5"], "id": 1}' https://pio-mainnet-1-rpc.provlabs.com

JSONRPC/websockets

JSONRPC requests can be also made via websocket. The websocket endpoint is at /websocket, e.g. https://pio-mainnet-1-rpc.provlabs.com/websocket. Asynchronous RPC functions like event subscribe and unsubscribe are only available via websockets.

For example using the websocat tool, you can subscribe for 'NewBlock` events with the following command:

echo '{ "jsonrpc": "2.0","method": "subscribe","id": 0,"params": {"query": "tm.event='"'NewBlock'"'"} }' | websocat -n -t wss://pio-mainnet-1-rpc.provlabs.com/websocket

Get block headers (max: 20) for minHeight <= height <= maxHeight.

Get block headers for minHeight <= height <= maxHeight.

At most 20 items will be returned.

Upon success, the Cache-Control header will be set with the default maximum age.

query Parameters
minHeight
integer
Example: minHeight=1

Minimum block height to return

maxHeight
integer
Example: maxHeight=2

Maximum block height to return

Responses

Response samples

Content type
application/json
{
  • "id": 0,
  • "jsonrpc": "2.0",
  • "result": {
    }
}

Get header at a specified height

Get Header.

If the height field is set to a non-default value, upon success, the Cache-Control header will be set with the default maximum age.

query Parameters
height
integer
Default: 0
Example: height=1

height to return. If no height is provided, it will fetch the latest header.

Responses

Response samples

Content type
application/json
{
  • "version": {
    },
  • "chain_id": "cosmoshub-2",
  • "height": "12",
  • "time": "2019-04-22T17:01:51.701356223Z",
  • "last_block_id": {
    },
  • "last_commit_hash": "21B9BC845AD2CB2C4193CDD17BFC506F1EBE5A7402E84AD96E64171287A34812",
  • "data_hash": "970886F99E77ED0D60DA8FCE0447C2676E59F2F77302B0C4AA10E1D02F18EF73",
  • "validators_hash": "D658BFD100CA8025CFD3BECFE86194322731D387286FBD26E059115FD5F2BCA0",
  • "next_validators_hash": "D658BFD100CA8025CFD3BECFE86194322731D387286FBD26E059115FD5F2BCA0",
  • "consensus_hash": "0F2908883A105C793B74495EB7D6DF2EEA479ED7FC9349206A65CB0F9987A0B8",
  • "app_hash": "223BF64D4A01074DC523A80E76B9BBC786C791FB0A1893AC5B14866356FCFD6C",
  • "last_results_hash": "",
  • "evidence_hash": "",
  • "proposer_address": "D540AB022088612AC74B287D076DBFBC4A377A2E"
}

Get header by hash

Get Header By Hash.

Upon success, the Cache-Control header will be set with the default maximum age.

query Parameters
hash
required
string
Example: hash=0xD70952032620CC4E2737EB8AC379806359D8E0B17B0488F627997A0B043ABDED

header hash

Responses

Response samples

Content type
application/json
{
  • "version": {
    },
  • "chain_id": "cosmoshub-2",
  • "height": "12",
  • "time": "2019-04-22T17:01:51.701356223Z",
  • "last_block_id": {
    },
  • "last_commit_hash": "21B9BC845AD2CB2C4193CDD17BFC506F1EBE5A7402E84AD96E64171287A34812",
  • "data_hash": "970886F99E77ED0D60DA8FCE0447C2676E59F2F77302B0C4AA10E1D02F18EF73",
  • "validators_hash": "D658BFD100CA8025CFD3BECFE86194322731D387286FBD26E059115FD5F2BCA0",
  • "next_validators_hash": "D658BFD100CA8025CFD3BECFE86194322731D387286FBD26E059115FD5F2BCA0",
  • "consensus_hash": "0F2908883A105C793B74495EB7D6DF2EEA479ED7FC9349206A65CB0F9987A0B8",
  • "app_hash": "223BF64D4A01074DC523A80E76B9BBC786C791FB0A1893AC5B14866356FCFD6C",
  • "last_results_hash": "",
  • "evidence_hash": "",
  • "proposer_address": "D540AB022088612AC74B287D076DBFBC4A377A2E"
}

Get block at a specified height

Get Block.

If the height field is set to a non-default value, upon success, the Cache-Control header will be set with the default maximum age.

query Parameters
height
integer
Default: 0
Example: height=1

height to return. If no height is provided, it will fetch the latest block.

Responses

Response samples

Content type
application/json
{
  • "id": 0,
  • "jsonrpc": "2.0",
  • "result": {
    }
}

Get block by hash

Get Block By Hash.

Upon success, the Cache-Control header will be set with the default maximum age.

query Parameters
hash
required
string
Example: hash=0xD70952032620CC4E2737EB8AC379806359D8E0B17B0488F627997A0B043ABDED

block hash

Responses

Response samples

Content type
application/json
{
  • "id": 0,
  • "jsonrpc": "2.0",
  • "result": {
    }
}