Virtual TestNets
Admin RPC

TestNet Admin RPC Methods

You can fully control your TestNet by using special RPC methods. These methods are made available through the Admin RPC, which you can copy from the Dashboard.

They allow you to manipulate the network state such as account balances, block numbers, and storage to accommodate your development needs.

Calls to these RPC methods are represented by a call to virtual TenderlyCheatcodes contract.

The list of special RPC methods listed here will only work if they are called through the Admin RPC.

Network customization

Send transaction

Unlimited faucet

Storage manipulation

State revert

evm_increaseTime

Advances the blockchain time by a specified amount and creates an empty block with the new timestamp.

Subsequent calls to eth_call and eth_sendRawTransaction will get different block.timestamp values based on the blockNumber they target:

  • For pending block: Returns current_time + time_increase This represents the expected timestamp of the next block to be mined.
  • For latest block: Returns time_of_evm_increaseTimestamp_call + time_increase. This is the timestamp of the empty block created when evm_increaseTimestamp was called.

Parameters

  • QUANTITY - hex-encoded time_increase of seconds to jump forward by

Returns

  • DATA - 32-byte block hash of the newly generated block

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_increaseTime",
  "params": ["0x15180"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "0x51e0a03f19e0c154b16363086aa6bbf22ad4582b0515b0a3a00519015f06246f",
  "id": "1234"
}

evm_setNextBlockTimestamp

Offsets current time to the specified timestamp, and creates an empty block with given timestamp.

Subsequent calls to eth_call and eth_sendRawTransaction will return different block.timestamp values based on the blockNumber they target:

  • For pending block: Returns specified_timestamp + time_since_evmSetNextBlockTimestamp_call. This represents the set timestamp plus any time elapsed since the method was called.
  • For latest block: Returns specified_timestamp. This is the timestamp of the empty block created when evm_setNextBlockTimestamp was called.

Parameters

  • QUANTITY - hex-encoded specified_timestamp that represents epoch timestamp (in seconds)

Returns

  • QUANTITY - integer (epoch timestamp) that is set for the next block

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_setNextBlockTimestamp",
  "params": ["1750074671"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": 1750074671,
  "id": "1234"
}

tenderly_setNextBlockTimestamp

Offsets current time to given timestamp without creating an empty block.

Subsequent calls to eth_call and eth_sendRawTransaction will return different block.timestamp values based on the blockNumber they target:

  • For pending block: Returns specified_timestamp + time_since_tenderly_setNextBlockTimestamp. This represents the set timestamp plus any time elapsed since the method was called.
  • For latest block: Returns the timestamp of the latest created block.

Parameters

  • QUANTITY - hex-encoded specified_timestamp that represents epoch timestamp (in seconds)

Returns

  • QUANTITY - integer (epoch timestamp) that is set for the next block

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_setNextBlockTimestamp",
  "params": ["1750074671"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": 1750074671,
  "id": "1234"
}

evm_increaseBlocks

Skips a number of blocks and generates a new block with the new block number.

Parameters

  • QUANTITY - hex-encoded number of blocks to skip

Returns

  • DATA - 32-byte block hash of the newly generated block

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_increaseBlocks",
  "params": ["0x20"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "0x51e0a03f19e0c154b16363086aa6bbf22ad4582b0515b0a3a00519015f06246f",
  "id": "1234"
}

eth_sendTransaction

Submits an unsigned transaction.

Parameters

  1. Transaction - The transaction object
  • from: DATA, 20 Bytes - The address the transaction is sent from.
  • to: DATA, 20 Bytes - (optional, omitted when creating new contract) The address the transaction is directed to.
  • gas: QUANTITY - (optional) Integer of the gas provided for the transaction execution. It will return unused gas.
  • gasPrice: QUANTITY - (optional) Integer of the gasPrice used for each paid gas.
  • value: QUANTITY - (optional) Integer of the value sent with this transaction.
  • data: DATA - (optional) The compiled code of a contract OR the hash of the invoked method signature and encoded parameters.
example.json
{
  "id": 0,
  "jsonrpc": "2.0",
  "method": "eth_sendTransaction",
  "params": [
    {
      "from": "0xDC6bDc37B2714eE601734cf55A05625C9e512461",
      "to": "0xff39a3e734fe363e631441f6d24c7539240c2628",
      "value": "0x0",
      "data": "0x2e7700f0"
    }
  ]
}

RESULT: Transaction hash STRING 32 byte hex value

eth_createAccessList

Returns the access tuples that would be touched by the transaction.

Parameters

  • SendTransactionObject - transaction object (same as the one provided to eth_sendTransaction)
  • BlockNumber - block number parameter

Returns

  • AccessList - an array of access tuples touched by the transaction

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "eth_getAccessList",
  "params": [
    {
      "from": "0x7ed8dff35e6fef1a6c1f95423cd8a64e22687aac",
      "to": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "gas": "0x76c00",
      "gasPrice": "0x0",
      "value": "0x0",
      "data": "0xa9059cbb0000000000000000000000005eddecc908575e1adcf857d8be380b9b7e5f658300000000000000000000000000000000000000000000000228813d891ab86000"
    },
    "latest"
  ],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": [
    {
      "address": "0x7ed8dff35e6fef1a6c1f95423cd8a64e22687aac"
    },
    {
      "address": "0x6b175474e89094c44da98b954eedeac495271d0f",
      "storage_keys": [
        "0x5051a693fd89be4fee1466db5a0684c1868dc09405da86e3d13004a803e302ec"
      ]
    },
    {
      "address": "0xc8f595e2084db484f8a80109101d58625223b7c9"
    }
  ],
  "id": 1234
}

evm_getLatest

Fetches the latest transaction ID on a network Virtual TestNet.

Parameters

Returns

  • DATA - UUID of the latest Virtual TestNet transaction

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_getLatest",
  "params": [],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "4a05d7ed-f66c-471a-899d-d6d843b8e790",
  "id": "1234"
}

tenderly_setBalance

Modifies the balance of an account or accounts.

Parameters

  • ADDRESS/ADDRESSES - a string or an array of account addresses
  • AMOUNT - hex-encoded number of an amount in wei

Returns

  • DATA - 32-byte block hash of the newly created transaction

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_setBalance",
  "params": [["0x0d2026b3EE6eC71FC6746ADb6311F6d3Ba1C000B", "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"], "0xDE0B6B3A7640000"],
  "id": "1234"
}

OR

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_setBalance",
  "params": ["0x0d2026b3EE6eC71FC6746ADb6311F6d3Ba1C000B", "0xDE0B6B3A7640000"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "0xc5b2c658f5fa236c598a6e7fbf7f21413dc42e2a41dd982eb772b30707cba2eb",
  "id": "1234"
}

tenderly_addBalance

Adds the balance to the provided account or accounts.

Parameters

  • ADDRESS/ADDRESSES - a string or an array of account addresses
  • AMOUNT - hex-encoded number of an amount in wei

Returns

  • DATA - 32-byte block hash of the newly created transaction

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_addBalance",
  "params": [["0x0d2026b3EE6eC71FC6746ADb6311F6d3Ba1C000B"], "0xDE0B6B3A7640000"],
  "id": "1234"
}

OR

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_addBalance",
  "params": ["0x0d2026b3EE6eC71FC6746ADb6311F6d3Ba1C000B", "0xDE0B6B3A7640000"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "0xc5b2c658f5fa236c598a6e7fbf7f21413dc42e2a41dd982eb772b30707cba2eb",
  "id": "1234"
}

tenderly_setErc20Balance

Sets the token balance for the wallet on the provided erc20 contract.

tenderly_setErc20Balance writes the new balance directly to the token contract’s storage and does not emit an ERC-20 Transfer event. If your downstream tooling (indexers, subgraphs, accounting) relies on Transfer events to track balances, use tenderly_addErc20Balance instead — it emits a synthetic Transfer log for each funded account.

Parameters

  • TOKEN_ADDRESS - address of the ERC20 contract
  • WALLET - address of the wallet that will get topped up
  • VALUE - 32-byte hash representing the wei value of the tokens

Returns

DATA - 32-byte hash of the newly created transaction (storage override is committed via transaction)

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_setErc20Balance",
  "params": [
    "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "0x40BdB4497614bAe1A67061EE20AAdE3c2067AC9e",
    "0xDE0B6B3A7640000"
  ],
  "id": 3640
}

Example response

example.json
{
  "id": 3640,
  "jsonrpc": "2.0",
  "result": "0x8a84686634729c57532b9ffa4e632e241b2de5c880c771c5c214d5e7ec465b1c"
}

tenderly_addErc20Balance

Adds the specified amount of tokens to one or more wallets on the provided ERC-20 contract. Unlike tenderly_setErc20Balance, this method emits a synthetic Transfer event for every funded account, so indexers, subgraphs, and any tooling that reconciles balances from logs stay in sync with the resulting state.

The emitted log has the standard ERC-20 Transfer(address,address,uint256) topic, uses the transaction sender as the from address and the funded wallet as the to address, and carries the added amount in the data field.

Parameters

  • TOKEN_ADDRESS - address of the ERC-20 contract
  • WALLETS - array of wallet addresses that will receive the tokens
  • VALUE - 32-byte hash representing the wei amount of tokens to add to each wallet

Returns

DATA - 32-byte hash of the newly created transaction (storage override is committed via transaction)

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_addErc20Balance",
  "params": [
    "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    [
      "0x40BdB4497614bAe1A67061EE20AAdE3c2067AC9e",
      "0xBd8DaA414Fda8a8A129F7035e7496759C5aF8570"
    ],
    "0xDE0B6B3A7640000"
  ],
  "id": 3641
}

Example response

example.json
{
  "id": 3641,
  "jsonrpc": "2.0",
  "result": "0x8a84686634729c57532b9ffa4e632e241b2de5c880c771c5c214d5e7ec465b1d"
}

tenderly_setMaxErc20Balance

Tops up the wallet address with maximum possible token balance (primarily intended for tokens that don’t have a simple balance mapping) on the provided erc20 contract.

Like tenderly_setErc20Balance, this method writes directly to storage and does not emit an ERC-20 Transfer event. Use tenderly_addErc20Balance when you need indexers or log-based tooling to pick up the balance change.

Parameters

  • YIELD_TOKEN_ADDRESS - address of the ERC20 contract
  • WALLET - address of the wallet that would get topped up

Returns

DATA - 32-byte hash of the newly created transaction (storage override is committed via transaction)

Example request

example.json
{
  "id": 0,
  "jsonrpc": "2.0",
  "method": "tenderly_setMaxErc20Balance",
  "params": [
    "0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84",
    "0xb5f45E52649123117C175B2016Ed3fCd26f9bE06"
  ]
}

Example response

example.json
{
  "id": 0,
  "jsonrpc": "2.0",
  "result": "0x8fb202d4612be9f6e96b955b4e5bd002cde4d79bec8a6d1b7d35976f124636a4"
}

tenderly_setStorageAt

Sets the storage of the provided address at the provided slot.

Parameters

  • ADDRESS - the address where the storage will be overridden
  • SLOT - 32-byte hash representing the storage slot key
  • VALUE - 32-byte hash representing the value at the key slot

Returns

  • DATA - 32-byte hash of the newly created transaction (storage override is committed via transaction)

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_setStorageAt",
  "params": [
    "0x3Df2f692132f55b97cc9DA04A1fFFEA82F5d710b",
    "0x8111de210bcfef10861a4ab6df0f4838296bd61d5a8f02dca283ed3b72a47bba",
    "0x0000000000000000000000000000000000000000000000000000000000000000"
  ],
  "id": "1"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "0xc5b2c658f5fa236c598a6e7fbf7f21413dc42e2a41dd982eb772b30707cba2eb",
  "id": "1234"
}

evm_snapshot

Returns a snapshot ID that allows you to revert a Virtual TestNet to a previous point (same as block hash from evm_getLatest).

Parameters

Returns

  1. DATA - hash of the latest block produced by the Virtual TestNet (Snapshot ID)

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_snapshot",
  "params": [],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": "0xfdb5a15fe652e0f47e4312df749f8cc1769d5e70f0bf3f26a4e231bb6a550f8d",
  "id": "1234"
}

evm_revert

Reverts the state of the Virtual TestNet to a previous snapshot.

Parameters

  • DATA - ID of the snapshot

Returns

  • BOOLEAN - operation success flag

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "evm_revert",
  "params": ["0xfdb5a15fe652e0f47e4312df749f8cc1769d5e70f0bf3f26a4e231bb6a550f8d"],
  "id": "1234"
}

Example response

example.json
{
  "jsonrpc": "2.0",
  "result": true,
  "id": "1234"
}

tenderly_setCode

Sets the code at a particular location. Example

Parameters

  • ADDRESS - Contract address
  • DATA - Bytecode

Returns

  • NUMBER - transaction hash

Example request

example.json
{
  "jsonrpc": "2.0",
  "method": "tenderly_setCode",
  "params": [
    "0x1",
    "0x1"
  ],
  "id": "1234"
}
State SyncSend Transactions