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Test RPC Configuration and usage

ATTENTION: The Truffle team has recently replaced Test RPC with Ganache we recommend reading our Ganache setup instructions here.

Ethereum TestRPC is a fast and customizable blockchain emulator. It allows making calls to the blockchain without the overheads of running an actual Ethereum node.

  • Accounts can be re-cycled, reset and instantiated with a fixed amount of Ether (no need for faucets or mining).
  • Gas price and mining speed can be modified.

Get started

Install Method Command
via NPM npm install -g ethereumjs-testrpc
Quicks start using Docker image (unsupported) docker run -d -p 8545:8545 ethereumjs/testrpc:latest
Passing options to testrpc through Docker docker run -d -p 8545:8545 ethereumjs/testrpc:latest -a 10 --debug
Build the Docker container from source git clone && cd testrpc docker build -t ethereumjs/testrpc

Starting Test RPC

The following command will start an instance of testrpc. Testrpc will automatically generate accounts from the seed phrases passed in with the -m switch.

testrpc -m "small failure organs crooks zero delivery fired extreme lost twenty alpha terror"

Test RPC

Implemented Methods

Some of the RPC methods currently implemented are:

  • bzz_hive (stub)
  • bzz_info (stub)
  • debug_traceTransaction
  • eth_accounts
  • eth_blockNumber
  • eth_call
  • eth_coinbase
  • eth_estimateGas
  • eth_gasPrice
  • eth_getBalance
  • eth_getBlockByNumber
  • eth_getBlockByHash
  • eth_getBlockTransactionCountByHash
  • eth_getBlockTransactionCountByNumber
  • eth_getCode (only supports block number “latest”)
  • eth_getCompilers
  • eth_getFilterChanges
  • eth_getFilterLogs
  • eth_getLogs
  • eth_getStorageAt
  • eth_getTransactionByHash
  • eth_getTransactionByBlockHashAndIndex
  • eth_getTransactionByBlockNumberAndIndex
  • eth_getTransactionCount
  • eth_getTransactionReceipt
  • eth_hashrate
  • eth_mining
  • eth_newBlockFilter
  • eth_newFilter (includes log/event filters)
  • eth_protocolVersion
  • eth_sendTransaction
  • eth_sendRawTransaction
  • eth_sign
  • eth_syncing
  • eth_uninstallFilter
  • net_listening
  • net_peerCount
  • net_version
  • miner_start
  • miner_stop
  • personal_listAccounts
  • personal_lockAccount
  • personal_newAccount
  • personal_unlockAccount
  • personal_sendTransaction
  • shh_version
  • rpc_modules
  • web3_clientVersion
  • web3_sha3

There’s also special non-standard methods that aren’t included within the original RPC specification:

Method Definition
evm_snapshot : Snapshot the state of the blockchain at the current block. Takes no parameters. Returns the integer id of the snapshot created.
evm_revert : Revert the state of the blockchain to a previous snapshot. Takes a single parameter, which is the snapshot id to revert to. If no snapshot id is passed it will revert to the latest snapshot. Returns true.
evm_increaseTime: Jump forward in time. Takes one parameter, which is the amount of time to increase in seconds. Returns the total time adjustment, in seconds.
evm_mine : Force a block to be mined. Takes no parameters. Mines a block independent of whether or not mining is started or stopped. Unsupported Methods.
eth_compileSolidity: If you’d like Solidity compilation in Javascript, please see the solc-js project. Docker.
Questions or feedback? You can discuss issues and obtain free support on Nethereum Discord channel.