Lido depositor bot
Introduction
Depositor bot is a part of Deposit Security Module.
The Depositor Bot obtains signed deposit messages from Council Daemons. Once a sufficient number of messages is collected to constitute a quorum, the bot proceeds to initiate a deposit into the designated staking module. This deposit is executed using the depositBufferedEther function within the DepositSecurityModule smart contract.
Requirements
Hardware
- 1-core CPU
- 2GB RAM
Nodes
- Ethereum EL RPC service
- Onchain databus transport RPC service (Gnosis at the moment)
How to use
Depositor bot performs series of checks before accepting the deposit. One of the most important optimisations it is
doing is optimising gas spending. An example of this is fetching GAS_FEE_PERCENTILE_DAYS_HISTORY_1
days of gas history
and checking GAS_FEE_PERCENTILE_1
bot will send transactions only if current gas price is less or equals to the
percentile. Also GAS_PRIORITY_FEE_PERCENTILE
, MIN_PRIORITY_FEE
, MAX_PRIORITY_FEE
variables are used to calculate
maxFeePerGas
and maxPriorityFeePerGas
transaction parameters. The formula is:
priority = min(max(
GAS_PRIORITY_FEE_PERCENTILE reward percentile of fee history for the last block,
MIN_PRIORITY_FEE,
),
MAX_PRIORITY_FEE,
)
maxFeePerGas = baseFeePerGas * 2 + priority
maxPriorityFeePerGas = priority
Envs
Required variables are(mainnet):
Variable | Default | Description |
---|---|---|
WEB3_RPC_ENDPOINTS | - | List of EL rpc endpoints that will be used to send requests comma separated (, ) |
WALLET_PRIVATE_KEY | - | Account private key |
CREATE_TRANSACTIONS | false | If true then tx will be send to blockchain |
LIDO_LOCATOR | 0xC1d0b3DE6792Bf6b4b37EccdcC24e45978Cfd2Eb | Lido Locator address. Mainnet by default. Other networks can be found here |
DEPOSIT_CONTRACT | 0x00000000219ab540356cBB839Cbe05303d7705Fa | Ethereum deposit contract address |
DEPOSIT_MODULES_WHITELIST | 1 | List of staking module's ids in which the depositor bot will make deposits |
--- | --- | --- |
MESSAGE_TRANSPORTS | - | Transports used in bot. Set: onchain_transport |
ONCHAIN_TRANSPORT_RPC_ENDPOINTS | - | List of databus(Gnosis) rpc endpoints that will be used for reading data bus contract, comma separated (, ). |
ONCHAIN_TRANSPORT_ADDRESS | - | Data bus contract address. |
MIN_PRIORITY_FEE | 50 mwei | Min priority fee that will be used in tx |
MAX_PRIORITY_FEE | 10 gwei | Max priority fee that will be used in tx |
MAX_GAS_FEE | 100 gwei | Bot will wait for a lower price. Treshold for gas_fee |
CONTRACT_GAS_LIMIT | 15000000 | Default transaction gas limit |
GAS_FEE_PERCENTILE_1 | 20 | Percentile for first recommended fee calculation |
GAS_FEE_PERCENTILE_DAYS_HISTORY_1 | 1 | Percentile for first recommended calculates from N days of the fee history |
GAS_PRIORITY_FEE_PERCENTILE | 25 | Priority transaction will be N percentile from priority fees in last block (min MIN_PRIORITY_FEE - max MAX_PRIORITY_FEE) |
Optional variables can be found here.
Running
Source Code
- Clone repository and install requirements:
git clone git@github.com:lidofinance/depositor-bot.git
cd depositor-bot - Install requirements
poetry install
- Run depositor bot
poetry run python src/depositor.py
- Verify in logs that depositor bot is performing validations, you should see logs of a kind:
{"name": "bots.depositor", "levelname": "INFO", "funcName": "execute", "lineno": 121, "module": "depositor", "pathname": "/app/src/bots/depositor.py", "timestamp": 1729511569, "msg": "Do deposit to module with id: 1."}
{"name": "bots.depositor", "levelname": "INFO", "funcName": "_deposit_to_module", "lineno": 210, "module": "depositor", "pathname": "/app/src/bots/depositor.py", "timestamp": 1729511569, "msg": "Checks failed. Skip deposit."}
{"name": "bots.depositor", "levelname": "INFO", "funcName": "_deposit_to_module", "lineno": 194, "module": "depositor", "pathname": "/app/src/bots/depositor.py", "timestamp": 1729511569, "msg": "Calculations deposit recommendations.", "value": false, "is_mellow": false}
If you are facing problems, check what environment variables depositor bot is using, find a log
line "msg": "Bot env variables"
Docker
Docker image can be found here.
Monitoring
Prometheus metrics will be available on endpoint http://localhost:${PROMETHEUS_PORT}/metrics
.
Alerts source code for AlertManager.