State

Overview

State APIs provide access to the blockchain state and other database access and management functions. State functions can be accessed from the JSON-API endpoints and within the console environment.

state_getBranches

Returns a list of all known branches.

Parameters: None

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getBranches" ,"id":21}'

Console Example

> state.getBranches()

Returns:

Array<Object>

Field

Type

Description

height

HexNumber

The height of the branch.

String

The unique branch ID.

isBranch

Boolean

Whether the chain is a branch.

length

HexNumber

The number of blocks in the branch.

parentBlockHash

String

The hash of the block where the branch started.

parentBlockNumber

HexNumber

The number of the block where the branch started.

totalDifficulty

HexNumber

The total difficulty of the branch.

timestamp

HexNumber

The unix time of creation of the branch.

Output:

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": [
      {
          "height": "0x1fdf",
          "id": "0xd64e1f13182149cf31a5654aca5df231bce538cf9bc466a919bcc6083d10a913",
          "timestamp": "0x1562c9ab49894e99",
          "totalDifficulty": "0x13048b3a00"
      },
      {
          "height": "0xb0",
          "id": "0x0a08d0a6dae1031f36390fad495072e2e4a243691e54103ead70a1eb7dc4e843",
          "isBranch": true,
          "length": "0x1",
          "parentBlockHash": "0x1c0c76ccfb63bc3aa4dcd096c8db51531529d5522b3a9d6dea93e2ad82cd8fe0",
          "parentBlockNumber": "0xaf",
          "timestamp": "0x1562cc956b3f41b0",
          "totalDifficulty": "0x68e77800"
      }
  ]
}

state_getBlock

Get a block by its number/height.

Parameters

Argument

Type

Description

number

Integer

The block's number

Set number to 0 to return the most recent block on the main branch.

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getBlock", "params": 2 ,"id":21}'

Console Example

> state.getBlock(number)

Returns:

Block

Output:

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "hash": "0x67e62d1da7bf41a7e7667f9273eefe5255756d14e424a135ea543e4bbb40e659",
    "header": {
      "creatorPubKey": "48YQpehoRDYsivCbnedrz19DfTvh345PwWAKGN3jdUjPNdG3Lte",
      "difficulty": "0x989680",
      "extra": "0x",
      "nonce": "0x61879fb427b56cef",
      "number": "0x2",
      "parentHash": "0x211df3aed05b45d620850f40c9b4eac006da7ee0f76a7fa99d5ac16a2c2ca42c",
      "stateRoot": "0xc222870b2ca3f71d30b8d06b8e3f633812a8c0473cecc38b6fcc12eb5cad89ec",
      "timestamp": "0x5bda0ad4",
      "totalDifficulty": "0x1312d00",
      "transactionsRoot": "0x0000000000000000000000000000000000000000000000000000000000000000"
    },
    "sig": "0x3e001b22d640331fbf324138b6182ab851e2989319c37ec33044b5495cd86e2160ca0ca2291e66a06ed329a21f1acc7c1c5fa67d96d0b87f6aaec4892cfcac05",
    "transactions": []
  }
}

state_getBlockByHash

Get a block by its hash.

Parameters

Argument

Type

Description

hash

String

The block's hash

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getBlockByHash", "params": "0x67e62d1da7bf41a7e7667f9273eefe5255756d14e424a135ea543e4bbb40e659" ,"id":21}'

Console Example

> state.getBlockByHash("0x67e62d1da7bf41a7e7667f9273eefe5255756d14e424a135ea543e4bbb40e659")

Returns:

Block

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "hash": "0x67e62d1da7bf41a7e7667f9273eefe5255756d14e424a135ea543e4bbb40e659",
    "header": {
      "creatorPubKey": "48YQpehoRDYsivCbnedrz19DfTvh345PwWAKGN3jdUjPNdG3Lte",
      "difficulty": "0x989680",
      "extra": "0x",
      "nonce": "0x61879fb427b56cef",
      "number": "0x2",
      "parentHash": "0x211df3aed05b45d620850f40c9b4eac006da7ee0f76a7fa99d5ac16a2c2ca42c",
      "stateRoot": "0xc222870b2ca3f71d30b8d06b8e3f633812a8c0473cecc38b6fcc12eb5cad89ec",
      "timestamp": "0x5bda0ad4",
      "totalDifficulty": "0x1312d00",
      "transactionsRoot": "0x0000000000000000000000000000000000000000000000000000000000000000"
    },
    "sig": "0x3e001b22d640331fbf324138b6182ab851e2989319c37ec33044b5495cd86e2160ca0ca2291e66a06ed329a21f1acc7c1c5fa67d96d0b87f6aaec4892cfcac05",
    "transactions": []
  }
}

state_getMinedBlocks

Get information about blocks that were mined on the node.

Parameters

Argument

Type

Description

limit

Integer

The maximum number of results to return (default: 25)

lastHash

String

Forces the query to return results after the specified

block hash. Useful for pagination.

creatorPubKey

String

Forces the query to return results for only blocks

created by a given public key.

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getMinedBlock", "params": { "limit": 1 } ,"id":21}'

Console Example

> state.getMinedBlocks({ limit: 10 })

Returns

Object

Field

Type

Description

blocks

Array<Object>

The slice of objects describing the blocks.

blocks.creatorPubKey

String

The block creator's public key.

blocks.hash

String

The block's hash.

blocks.number

Integer

The block's number.

blocks.timestamp

Integer

The block's timestamp.

blocks.totalFees

String

The total transaction fees from the block.

blocks.txCount

Integer

The number of transactions in the block.

hasMore

Boolean

Indicates that there are more results to be fetched

Output:

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "blocks": [
      {
        "creatorPubKey": "48jQzKSZ5U1eH7azq7fjqsYCuT129cBMhByrjUQcfQjTTknkE3v",
        "hash": "0x8d51a2c86874744d5c690f1bc789b375d7671bf75a45e913339da16350574cba",
        "number": "0x9",
        "timestamp": 1552074221,
        "totalFees": "0",
        "txCount": 0
      },
      {
        "creatorPubKey": "48jQzKSZ5U1eH7azq7fjqsYCuT129cBMhByrjUQcfQjTTknkE3v",
        "hash": "0xcfcd98936bea3af39959216e6668c0f83c9aeb50f201cf975c26de7127fcd66d",
        "number": "0x8",
        "timestamp": 1552074202,
        "totalFees": "0",
        "txCount": 0
      }
    ],
    "hasMore": true
  }
}

state_getBestChain

Get the main chain

Parameters: None

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getBestChain", "id":21}'

Console Example

> state.getBestChain()

Returns:

Object

Field

Type

Description

String

The chain's unique ID.

height

HexNumber

The height of chain.

totalDifficulty

HexNumber

The chain's total difficulty.

timestamp

HexNumber

The unix time of creation.

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "height": "0x1fdf",
    "id": "0xd64e1f13182149cf31a5654aca5df231bce538cf9bc466a919bcc6083d10a913",
    "timestamp": "0x1562c9ab49894e99",
    "totalDifficulty": "0x13048b3a00"
  }
}

state_getOrphans

Get all known orphan blocks

Parameters: None

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getOrphans", "id":21}'

Console Example

> state.getOrphans()

Returns:

Array<Block>

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": [
    {
      "hash": "0x67e62d1da7bf41a7e7667f9273eefe5255756d14e424a135ea543e4bbb40e659",
      "header": {
        "creatorPubKey": "48YQpehoRDYsivCbnedrz19DfTvh345PwWAKGN3jdUjPNdG3Lte",
        "difficulty": "0x989680",
        "extra": "0x",
        "nonce": "0x61879fb427b56cef",
        "number": "0x2",
        "parentHash": "0x211df3aed05b45d620850f40c9b4eac006da7ee0f76a7fa99d5ac16a2c2ca42c",
        "stateRoot": "0xc222870b2ca3f71d30b8d06b8e3f633812a8c0473cecc38b6fcc12eb5cad89ec",
        "timestamp": "0x5bda0ad4",
        "totalDifficulty": "0x1312d00",
        "transactionsRoot": "0x0000000000000000000000000000000000000000000000000000000000000000"
      },
      "sig": "0x3e001b22d640331fbf324138b6182ab851e2989319c37ec33044b5495cd86e2160ca0ca2291e66a06ed329a21f1acc7c1c5fa67d96d0b87f6aaec4892cfcac05",
      "transactions": [...]
    }
  ]
}

state_getReOrgs

Get records of re-organization events

Parameters: None

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getReOrgs", "id":21}'

Console Example

> state.getReOrgs()

Returns:

Array<Object>

Field

Type

Description

mainChainID

String

The ID of the main chain before the re-org.

reOrgLen

Int

The number of blocks involved in the reorganization.

branchID

String

The unique branch ID.

branchLen

Int

The number of blocks in the branch.

timestamp

Int

The time of creation.

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": [      
     {
        "mainChainID": "0xd64e1f13182149cf31a5654aca5df231bce538cf9bc466a919bcc6083d10a913",
        "reOrgLen": 2,
        "branchID": "0x1429ab07a29f5f13b0b360803be463e160df113556313b24db6d90f5c686f53f",
        "branchLen": 2,
        "timestamp": 1541020805
      }
   ]
}

state_getAccount

Get an account

Parameters:

Argument

Type

Description

address

String

The address associated with the account.

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getAccount", "params": "eGzzf1HtQL7M9Eh792iGHTvb6fsnnPipad", "id":21}'

Console Example

> state.getAccount("eGzzf1HtQL7M9Eh792iGHTvb6fsnnPipad")

Returns:

Account

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "address": "eGzzf1HtQL7M9Eh792iGHTvb6fsnnPipad",
    "balance": "100.000000000000000000",
    "nonce": 0,
    "type": 0
  }
}

state_listAccounts

List all accounts

Parameters: None

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_listAccounts", "id":21}'

Console Example

> state.listAccounts()

Returns:

Array<Account>

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": [
    {
      "address": "e27wBivep3B7XXJWsLhdur5Zq7qvYW8m8c",
      "balance": "100.000000000000000000",
      "nonce": 0,
      "type": 0
    },
    {
      "address": "e27uMdGs5w8vXPJFfGyeFb7ikJTaNThjSV",
      "balance": "100.000000000000000000",
      "nonce": 0,
      "type": 0
    }
  ]
}

state_listTopAccounts

List accounts ordered by their balance in descending order.

Parameters:

Argument

Type

Description

limit

Int

The number of accounts to return

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_listTopAccounts", "params": 10, "id":21}'

Console Example

> state.listTopAccounts(10)

Returns:

Array<Account>

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": [
    {
      "address": "e27wBivep3B7XXJWsLhdur5Zq7qvYW8m8c",
      "balance": "100.000000000000000000",
      "nonce": 0,
      "type": 0
    },
    {
      "address": "e27uMdGs5w8vXPJFfGyeFb7ikJTaNThjSV",
      "balance": "100.000000000000000000",
      "nonce": 0,
      "type": 0
    }
  ]
}

state_getAccountNonce

Get the current nonce of an account

Parameters:

Argument

Type

Description

address

String

The address of the account

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getAccountNonce", "params": "e2fFNsXAoyzsYQeopt7PRk3KpKj46nYgvB", "id":21}'

Console Example

> state.getAccountNonce("e2fFNsXAoyzsYQeopt7PRk3KpKj46nYgvB")

Returns:

Integer

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": 2
}

state_getTransaction

Get a transaction by its hash

Parameters:

Argument

Type

Description

hash

String

The transaction's hash

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getTransaction", "params": "0xf91be74146afb8717834f70969d02edff4316508dc62ec8716104968391fc492", "id":21}'

Console Example

> state.getTransaction("0xf91be74146afb8717834f70969d02edff4316508dc62ec8716104968391fc492")

Returns:

Transaction

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "fee": "0",
    "from": "eNGGuhVSrXWWFYmVQBid9hFhiNLAfvPwzS",
    "hash": "0xf91be74146afb8717834f70969d02edff4316508dc62ec8716104968391fc492",
    "nonce": "0x0",
    "senderPubKey": "497a8Z5sTvCgFZYyQQ8Uh3tgm726uPBzM4v3fNpcygevyCcTJf6",
    "sig": "0xe579837d73b45af9cc9e381cfe7009106c5ea6c65a22356a61103e9724b92bbb8a7243a4765d28d9e2aa89d34df585efc08c07fff9eb4a649f60f03f3310890e",
    "timestamp": "0x5bcc82b7",
    "to": "eGzzf1HtQL7M9Eh792iGHTvb6fsnnPipad",
    "type": "0x2",
    "value": "100"
  }
}

state_getDifficulty

Get the current difficulty and total difficulty of the main chain.

Parameters: None

Curl Example:

curl -X POST --data '{"jsonrpc":"2.0","method":"state_getDifficulty", "id":21}'

Console Example

> state.getDifficulty()

Returns:

Object

Field

Type

Description

difficulty

HexNumber

The current difficulty.

totalDifficulty

HexNumber

The total difficulty of the main chain.

Output

{
  "id": 21,
  "jsonrpc": "2.0",
  "result": {
    "difficulty": "0x98fdea",
    "totalDifficulty": "0x13048b3a00"
  }
}

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