Kava

Kava API is available on Web3 API platform (opens in a new tab).

The Kava Network is the Layer-1 blockchain that combines the speed and scalability of the Cosmos SDK with the developer support of Ethereum. Kava will empower developers to build for Web3 and next-gen blockchain technologies through its unique co-chain architecture. KAVA is the native governance and staking token of the Kava Network, enabling its decentralization and security.

In order for your Web3 application to interact with Kava — either by reading blockchain data or sending transactions to the network — it must connect to a Kava node. Developers interact with the blockchain using the methods provided by the API.

We support the following networks and protocols for Kava:

Responses come in JSON format (opens in a new tab).

EVM JSON-RPC methods

web3_clientVersion — returns the current client version.
web3_sha3 — returns Keccak-256 (not the standardized SHA3-256) of the given data.
net_version — returns the current network ID.
net_listening — returns true if client is actively listening for network connections.
eth_protocolVersion — returns the current protocol version.
eth_syncing — returns data on the sync status or false.
eth_gasPrice — returns the current price per gas in wei.
eth_accounts — returns a list of addresses owned by client.
eth_blockNumber — returns the number of most recent block.
eth_getBalance — returns the balance of the account specified by address.
eth_getStorageAt — returns the value from a storage position at an address specified.
eth_getTransactionCount — returns the number of transactions sent from an address.
eth_getBlockTransactionCountByHash — returns the number of transactions in a block specified by block hash.
eth_getBlockTransactionCountByNumber — returns the number of transactions in the block specified by number.
eth_getUncleCountByBlockHash — returns the number of uncles in a block specified by block hash.
eth_getUncleCountByBlockNumber — returns the number of uncles in a block specified by block number.
eth_getCode — returns code at an address specified.
eth_sendRawTransaction — creates a new message call transaction or a contract creation for signed transactions.
eth_call — executes a new message call immediately without creating a transaction on the blockchain.
eth_estimateGas — generates and returns an estimate of how much gas is necessary to allow the transaction to complete.
eth_getBlockByHash — returns information for the block specified by block hash.
eth_getBlockByNumber — returns information for the block specified by block number.
eth_getTransactionByHash — returns information on a transaction specified by transaction hash.
eth_getTransactionByBlockHashAndIndex — returns information on a transaction specified by block hash and transaction index position.
eth_getTransactionByBlockNumberAndIndex — returns information on a transaction by block number and transaction index position.
eth_getTransactionReceipt — returns the receipt of a transaction by transaction hash.
eth_getUncleByBlockHashAndIndex — returns information about an uncle of a block by hash and uncle index position.
eth_getUncleByBlockNumberAndIndex — returns information about an uncle of a block by number and uncle index position.
eth_getLogs — returns logs matching the parameters specified.

`web3_clientVersion`

Returns the current client version.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<string>: the current client version.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "web3_clientVersion",
      "params": [],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "Version dev ()Compiled at  using Go go1.21.1 (amd64)"
}

`web3_sha3`

Returns Keccak-256 (not the standardized SHA3-256) of the given data.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
- <string> (data): the data to convert into a SHA3 hash.

Returns

<string> (data): the SHA3 result of the given string.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "web3_sha3",
      "params": ["0x68656c6c6f20776f726c64"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x5b2c76da96136d193336fad3fbc049867b8ca157da22f69ae0e4923648250acc"
}

`net_version`

Returns the current network ID.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<string>: the current network ID.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "net_version",
      "params": [],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "2222"
}

`net_listening`

Returns true if client is actively listening for network connections.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<boolean>: true when listening, otherwise false.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "net_listening",
      "params": [],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": true
}

`eth_protocolVersion`

Returns the current Ethereum protocol version.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<string>: the current Ethereum protocol version.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_protocolVersion",
      "params": [],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "result": "0x41",
    "id": 1
}

`eth_syncing`

Returns an object with data about the sync status or false.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<object>|<boolean>: an object with sync status data or false, when not syncing:
- startingBlock (quantity): the block at which the import started (will only be reset, after the sync reached its head).
- currentBlock (quantity): the current block, same as eth_blockNumber.
- highestBlock (quantity): the estimated highest block.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_syncing",
      "params": [],
      "id": 1
    }'

Response example (syncing)

{
    "id": 1,
    "jsonrpc": "2.0",
    "result": {
        "startingBlock": "0x384",
        "currentBlock": "0x386",
        "highestBlock": "0x454"
    }
}

Response example (not syncing)

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": false
}

`eth_gasPrice`

Returns the current price per gas in wei.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<string> (quantity): the current gas price in wei.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_gasPrice",
      "params": [],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x3b9aca00"
}

`eth_accounts`

Returns a list of addresses owned by client.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<array> (string; data, 20 bytes): addresses owned by the client.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_accounts",
      "params": [],
      "id": 1
    }'

Response example

{
    "id": 1,
    "jsonrpc": "2.0",
    "result": [
        "0x407d73d8a49eeb85d32cf465507dd71d507100c1"
    ]
}

`eth_blockNumber`

Returns the number of most recent block.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required): None.

Returns

<string> (quantity): the current block number the client is on.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_blockNumber",
      "params": [],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x847e09"
}

`eth_getBalance`

Returns the balance of the account specified by address.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data, 20 bytes): an address to check for balance.
2. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (quantity): the current balance in wei.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getBalance",
      "params": ["0xCe292495Ac1166215eA02f1616900F90B3C20762", "latest"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x594c67b5408f"
}

`eth_getStorageAt`

Returns the value from a storage position at an address specified.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data, 20 bytes): an address of the storage (hex encoded).
2. <string> (quantity): a slot position in the storage (hex encoded unsigned integer).
3. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (data): the value at this storage position.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getStorageAt",
      "params": ["0xCe292495Ac1166215eA02f1616900F90B3C20762", "0x0", "latest"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x0000000000000000000000000000000000000000000000000000000000000000"
}

`eth_getTransactionCount`

Returns the number of transactions sent from an address.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data, 20 bytes): an address.
2. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (quantity): the number of transactions send from this address.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getTransactionCount",
      "params": ["0xB8FF877ed78Ba520Ece21B1de7843A8a57cA47Cb", "latest"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x26db1d"
}

`eth_getBlockTransactionCountByHash`

Returns the number of transactions in a block specified by block hash.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data, 32 bytes): a block hash.

Returns

<string> (quantity): the number of transactions in this block.

Request example:

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getBlockTransactionCountByHash",
      "params": ["0x004e9007f85b0931df490262b1605837596c8e622e981282123eb949564f4a5e"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0xe"
}

`eth_getBlockTransactionCountByNumber`

Returns the number of transactions in the block specified by number.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (quantity): the number of transactions in this block.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getBlockTransactionCountByNumber",
      "params": ["0x847E17"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0xa"
}

`eth_getUncleCountByBlockHash`

Returns the number of uncles in a block specified by block hash.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data, 32 bytes): a block hash.

Returns

<string> (quantity): the number of uncles in this block.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getUncleCountByBlockHash",
      "params": ["0x2e0fde25135f358272f79f9c370b8934b4524e87bd8e04aad8a42d4fc4003c2c"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x0"
}

`eth_getUncleCountByBlockNumber`

Returns the number of uncles in a block specified by block number.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (quantity): the number of uncles in this block.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getUncleCountByBlockNumber",
      "params": ["0x847E12"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x0"
}

`eth_getCode`

Returns code at a given address.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data, 20 bytes): an address to get the code from.
2. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (data): the code from the given address.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
      "jsonrpc": "2.0",
      "method": "eth_getCode",
      "params": ["0x2a6b5109F48A5d50D82f618500237a70608fc9b2", "latest"],
      "id": 1
    }'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x"
}

`eth_sendRawTransaction`

Creates new message call transaction or a contract creation for signed transactions.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <string> (data): the signed transaction data.

Returns

<string> (data, 32 bytes): the transaction hash, or the zero hash if the transaction is not yet available.

Use eth_getTransactionReceipt to get the contract address, after the transaction was mined, when you created a contract.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
    "jsonrpc": "2.0",
    "method": "eth_sendRawTransaction",
    "params": ["0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"],
    "id": 1
}'

Response example

{
    "id": 1,
    "jsonrpc": "2.0",
    "result": "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
}

`eth_call`

Executes a new message call immediately without creating a transaction on the blockchain.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <object> (hex encoded): the transaction object:
  - from (string; data, 20 bytes; optional): the address the transaction is sent from.
  - to (string; data, 20 bytes): the address the transaction is directed to.
  - gas (string; quantity; optional): the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
  - gasPrice (string; quantity; optional): the gas price willing to be paid by the sender in wei.
  - value (string; quantity; optional): the value sent with this transaction, in wei.
  - data (string; data; optional): the hash of the method signature and encoded parameters.
2. <string> (quantity|tag): either the hex value of a block number or one of the following block tags:
  - earliest: the lowest numbered block available on the client.
  - finalized: the most recent crypto-economically secure block; cannot be re-orged outside of manual intervention driven by community coordination.
  - safe: the most recent block that is safe from re-orgs under honest majority and certain synchronicity assumptions.
  - latest: the most recent block in the canonical chain observed by the client; this block can be re-orged out of the canonical chain even under healthy/normal conditions.
  - pending: a sample next block built by the client on top of the latest and containing the set of transactions usually taken from local mempool. In other words, it is the block that has not been mined yet.

Returns

<string> (hex encoded bytes): the return value of executed contract.

Request example

curl -X POST https://rpc.ankr.com/kava_evm \
-H 'Content-Type: application/json' \
-d '{
    "jsonrpc": "2.0",
    "method": "eth_call",
    "params": [{"from":null,"to":"0xE0c865f883cbF9A2be65fFa03B7330013faD9BFe","data":"0x70a082310000000000000000000000006E0d01A76C3Cf4288372a29124A26D4353EE51BE"}, "latest"],
    "id": 1
}'

Response example

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x"
}

`eth_estimateGas`

Generates and returns an estimate of how much gas is necessary to allow the transaction to complete.

The transaction will not be added to the blockchain. Note that the estimate may be significantly more than the amount of gas actually used by the transaction, for a variety of reasons including EVM mechanics and node performance.

Parameters

id (integer; required): a request ID (example: 1).
jsonrpc (string; required): a JSON RPC spec used (example: 2.0).
method (string; required): a method used for the request.
params (array; required):
1. <object> (hex encoded): the transaction object:
  - from (string; data, 20 bytes; optional): the address the transaction is sent from.
  - to (string; data, 20 bytes; optional): the address the transaction is directed to.
  - gas (string; quantity; optional): the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
  - gasPrice (string; quantity; optional): the gas price willing to be paid by the sender in wei.
  - value (string; quantity; optional): the value sent with this transaction, in wei.
  - data (string; data; optional): the hash of the method signature and encoded parameters.