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<div class="logo"><a href="/v5/"><div class="image"></div><div class="name">ethers</div><div class="version">v5.0-beta</div></a></div>
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<div class="link title"><a href="/v5/">Documentation</a></div><div class="base show link depth-1"><a href="/v5/getting-started/">Getting Started</a></div><div class="base show link depth-1"><a href="/v5/concepts/">Ethereum Basics</a></div><div class="hide link depth-2"><a href="/v5/concepts/events/">Events</a></div><div class="hide link depth-2"><a href="/v5/concepts/gas/">Gas</a></div><div class="hide link depth-2"><a href="/v5/concepts/security/">Security</a></div><div class="base show link depth-1"><a href="/v5/api/">Application Programming Interface</a></div><div class="hide link depth-2"><a href="/v5/api/contract/">Contract Interaction</a></div><div class="hide link depth-3"><a href="/v5/api/contract/contract/">Contract</a></div><div class="hide link depth-3"><a href="/v5/api/contract/contract-factory/">ContractFactory</a></div><div class="hide link depth-3"><a href="/v5/api/contract/example/">Example: ERC-20 Contract</a></div><div class="hide link depth-2"><a 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<div class="breadcrumbs"><a href="/v5/">Documentation</a> » <a href="/v5/cli/">Command Line Interfaces</a> » <span class="current">Sandbox Utility</span></div>
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<a name="sandbox-utility"></a><h1 class="show-anchors"><div>Sandbox Utility<div class="anchors"><a class="self" href="/v5/cli/ethers/#sandbox-utility"></a></div></div></h1><p>The sandbox utility provides a simple way to use the most common ethers utilities required during learning, debuging and managing interactions with the Ethereum network.</p>
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<p>If no command is given, it will enter a REPL interface with many of the ethers utilities already exposed.</p>
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<a name="sandbox-utility--help"></a><h2 class="show-anchors"><div>Help<div class="anchors"><a class="self" href="/v5/cli/ethers/#sandbox-utility--help"></a></div></div></h2>
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<div class="code">Usage:
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ethers [ COMMAND ] [ ARGS ] [ OPTIONS ]
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COMMANDS (default: sandbox)
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sandbox Run a REPL VM environment with ethers
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init FILENAME Create a new JSON wallet
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[ --force ] Overwrite any existing files
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fund TARGET Fund TARGET with testnet ether
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info [ TARGET ... ] Dump info for accounts, addresses and ENS names
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send TARGET ETHER Send ETHER ether to TARGET form accounts[0]
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[ --allow-zero ] Allow sending to the address zero
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[ --data DATA ] Include data in the transaction
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sweep TARGET Send all ether from accounts[0] to TARGET
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sign-message MESSAGE Sign a MESSAGE with accounts[0]
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[ --hex ] The message content is hex encoded
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eval CODE Run CODE in a VM with ethers
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run FILENAME Run FILENAME in a VM with ethers
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wait HASH Wait for a transaction HASH to be mined
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wrap-ether VALUE Deposit VALUE into Wrapped Ether (WETH)
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unwrap-ether VALUE Withdraw VALUE from Wrapped Ether (WETH)
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send-token TOKEN ADDRESS VALUE
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Send VALUE tokens (at TOKEN) to ADDRESS
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compile FILENAME Compiles a Solidity contract
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[ --no-optimize ] Do not optimize the compiled output
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[ --warnings ] Error on any warning
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deploy FILENAME Compile and deploy a Solidity contract
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[ --no-optimize ] Do not optimize the compiled output
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[ --contract NAME ] Specify the contract to deploy
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ACCOUNT OPTIONS
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--account FILENAME Load from a file (JSON, RAW or mnemonic)
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--account RAW_KEY Use a private key (insecure *)
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--account 'MNEMONIC' Use a mnemonic (insecure *)
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--account - Use secure entry for a raw key or mnemonic
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--account-void ADDRESS Use an address as a void signer
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--account-void ENS_NAME Add the resolved address as a void signer
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--account-rpc ADDRESS Add the address from a JSON-RPC provider
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--account-rpc INDEX Add the index from a JSON-RPC provider
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--mnemonic-password Prompt for a password for mnemonics
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--xxx-mnemonic-password Prompt for a (experimental) hard password
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PROVIDER OPTIONS (default: all + homestead)
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--alchemy Include Alchemy
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--etherscan Include Etherscan
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--infura Include INFURA
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--nodesmith Include nodesmith
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--rpc URL Include a custom JSON-RPC
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--offline Dump signed transactions (no send)
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--network NETWORK Network to connect to (default: homestead)
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TRANSACTION OPTIONS (default: query network)
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--gasPrice GWEI Default gas price for transactions(in wei)
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--gasLimit GAS Default gas limit for transactions
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--nonce NONCE Initial nonce for the first transaction
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--yes Always accept Siging and Sending
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OTHER OPTIONS
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--wait Wait until transactions are mined
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--debug Show stack traces for errors
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--help Show this usage and exit
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--version Show this version and exit
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(*) By including mnemonics or private keys on the command line they are
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possibly readable by other users on your system and may get stored in
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your bash history file. This is NOT recommended.</div><a name="sandbox-utility--examples"></a><h2 class="show-anchors"><div>Examples<div class="anchors"><a class="self" href="/v5/cli/ethers/#sandbox-utility--examples"></a></div></div></h2>
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<a name="cliex-init"></a><div class="code-title"><div>Creating New Wallets</div></div><div class="code">/home/ethers> ethers init wallet.json
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Creating a new JSON Wallet - wallet.json
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Keep this password and file SAFE!! If lost or forgotten
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it CANNOT be recovered, by ANYone, EVER.
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Choose a password: ******
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Confirm password: ******
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Encrypting... 100%
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New account address: 0x485bcC23ae2E5038ec7ec9b8DCB2A6A6291cC003
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Saved: wallet.json
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# If you are planning to try out the Ropsten testnet...
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/home/ethers> ethers --network ropsten fund 0x485bcC23ae2E5038ec7ec9b8DCB2A6A6291cC003
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Transaction Hash: 0x8dc55b8f8dc8076acded97f9e3ed7d6162460c0221e2769806006b6d7d1156e0</div><a name="cliex-send"></a><div class="code-title"><div>Sending Ether and Tokens</div></div><div class="code"># Sending ether
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/home/ricmoo> ethers --account wallet.json send ricmoo.firefly.eth 0.123
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Password (wallet.json): ******
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Decrypting... 100%
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Transaction:
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To: 0x8ba1f109551bD432803012645Ac136ddd64DBA72
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From: 0xaB7C8803962c0f2F5BBBe3FA8bf41cd82AA1923C
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Value: 0.123 ether
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Nonce: 96
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Data: 0x
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Gas Limit: 21000
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Gas Price: 1.2 gwei
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Chain ID: 1
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Network: homestead
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Send Transaction? (y/N/a) y
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Response:
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Hash: 0xc4adf8b379033d7ab679d199aa35e6ceee9a802ca5ab0656af067e911c4a589a
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# Sending a token (SAI)
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# NOTE: the contract address could be used instead but
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# popular token contract addresses are also managed
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# by ethers
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/home/ricmoo> ethers --account wallet.json send-token sai.tokens.ethers.eth ricmoo.firefly.eth 1.0
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Sending Tokens:
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To: 0x8ba1f109551bD432803012645Ac136ddd64DBA72
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Token Contract: 0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359
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Value: 1.0
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Password (wallet.json): ******
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Decrypting... 100%
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Transaction:
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To: 0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359
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From: 0xaB7C8803962c0f2F5BBBe3FA8bf41cd82AA1923C
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Value: 0.0 ether
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Nonce: 95
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Data: 0xa9059cbb0000000000000000000000008ba1f109551bd432803012645ac136ddd64dba720000000000000000000000000000000000000000000000000de0b6b3a7640000
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Gas Limit: 37538
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Gas Price: 1.0 gwei
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Chain ID: 1
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Network: homestead
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Send Transaction? (y/N/a) y
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Response:
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Hash: 0xd609ecb7e3b5e8d36fd781dffceede3975ece6774b6322ea56cf1e4d0a17e3a1</div><a name="cliex-signing"></a><div class="code-title"><div>Signing Messages</div></div><div class="code">/home/ethers> ethers --account wallet.json sign-message 'Hello World'
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Password (wallet.json): ******
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Decrypting... 100%
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Message:
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Message: "Hello World"
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Message (hex): 0x48656c6c6f20576f726c64
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Sign Message? (y/N/a) y
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Signature
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Flat: 0xca3f0b32a22a5ab97ca8be7e4a36b1e81d565c6822465d769f4faa4aa24539fb122ee5649c8a37c9f5fc8446593674159e3a7b039997cd6ee697a24b787b1a161b
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r: 0xca3f0b32a22a5ab97ca8be7e4a36b1e81d565c6822465d769f4faa4aa24539fb
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s: 0x122ee5649c8a37c9f5fc8446593674159e3a7b039997cd6ee697a24b787b1a16
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vs: 0x122ee5649c8a37c9f5fc8446593674159e3a7b039997cd6ee697a24b787b1a16
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v: 27
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recid: 0</div><a name="cliex-scripting"></a><a name="sandbox-utility--examples--cliex-scripting"></a><h3 class="show-anchors"><div>Scripting<div class="anchors"><a class="self" href="/v5/cli/ethers/#cliex-scripting"></a></div></div></h3><p>The <code class="inline">eval</code> command can be used to execute simple one-line scripts from the command line to be passed into other commands or stored in script environment variables.</p>
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<div class="code-title"><div>Get the formatted balance of an account</div></div><div class="code">/home/ethers> ethers --network ropsten \
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--account wallet.json \
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eval \
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'accounts[0].getBalance().then(b => formatEther(b))'
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3.141592653589793238</div><div class="code-title"><div>Get the current block number</div></div><div class="code">/home/ethers> ethers --network rinkeby \
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eval "provider.getBlockNumber()"
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5761009</div><div class="code-title"><div>Convert a Solidity signature to JSON</div></div><div class="code">/home/ethers> ethers eval 'utils.Fragment.from(
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"function balanceOf(address) view returns (uint)"
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).format("json")' | json_pp
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{
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"inputs" : [
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{
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"type" : "address",
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"name" : "owner"
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}
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],
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"type" : "function",
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"payble" : false,
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"stateMutability" : "view",
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"ouputs" : [
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{
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"type" : "uint256"
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}
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],
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"name" : "balanceOf",
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"constant" : true
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}</div><div class="code-title"><div>Compute a topic hash</div></div><div class="code">/home/ricmoo> ethers eval 'id("Transfer(address,address,uint256")'
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0xd99659a21de82e379975ce8df556f939a4ccb95e92144f38bb0dd35730ffcdd5</div><div class="code-title"><div>Create a random mnemonic</div></div><div class="code">/home/ricmoo> ethers eval 'Wallet.createRandom().mnemonic'
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useful pond inch knock ritual matrix giggle attend dilemma convince coach amazing</div><a name="cliex-mnemonicpassword"></a><a name="sandbox-utility--examples--cliex-mnemonicpassword"></a><h3 class="show-anchors"><div>Using Mnemonics (with a password)<div class="anchors"><a class="self" href="/v5/cli/ethers/#cliex-mnemonicpassword"></a></div></div></h3><p>All mnemonic phrases have a password, but the default is to use the empty string (i.e. <code class="inline">""</code>) as the password. If you have a password on your mnemonic, the <code class="inline">--mnemonic-password</code> will prompt for the password to use to decrypt the account.</p>
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<div class="code">/home/ricmoo> ethers --account mnemonic.txt --mnemonic-password
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Password (mnemonic): ******
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network: homestead (chainId: 1)
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homestead> accounts[0].getAddress()
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<Promise id=0 resolved>
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'0x6d3F723EC1B73141AA4aC248c3ab34A5a1DAD776'
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homestead></div><a name="cliex-mnemonicpassword-xxx"></a><a name="sandbox-utility--examples--cliex-mnemonicpassword-xxx"></a><h3 class="show-anchors"><div>Using Mnemonics (with experimental memory-hard passwords)<div class="anchors"><a class="self" href="/v5/cli/ethers/#cliex-mnemonicpassword-xxx"></a></div></div></h3><p>The <code class="inline">--xxx-mnemonic-password</code> is similar to the <code class="inline">--mnemonic-password</code> options, which uses a password to decrypt the account for a mnemonic, however it passes the password through the <a href="https://en.wikipedia.org/wiki/Scrypt">scrypt</a> <i>password-based key derivation function</i> first, which is intentionally slow and makes a brute-force attack far more difficult.</p>
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<div class="code">/home/ricmoo> ethers --account mnemonic.txt --xxx-mnemonic-password
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Password (mnemonic; experimental - hard): ******
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Decrypting... 100%
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network: homestead (chainId: 1)
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homestead> accounts[0].getAddress()
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<Promise id=0 resolved>
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'0x56FC8792cC17971C19bEC4Ced978beEA44711EeD'
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homestead></div><div class="definition container-box warning"><div class="term">Note</div><div class="body"><p>This is still an experimental feature (hence the <code class="inline">xxx</code>).</p>
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