​
Interacting with the Bidder Node

Ensure you have completed the Quickstart step in a separate terminal. This will set up your environment and place your key in the $HOME/.mev-commit directory, along with running the required bidder node.

Now that you’ve made sure we have a bidder node running, we can interact with it using the following commands:

❯_ terminal
cd $HOME/.mev-commit;
export KEY=$(cat key);
export ADDRESS=$(cast wallet address --private-key 0x$(cat key))

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Getting Deposit

To get the current deposit balance in the contract for the current window:

❯_ terminal
curl -s http://localhost:13523/v1/bidder/get_deposit

To get the current deposit balance in the contract for a specific window:

❯_ terminal
curl -s http://localhost:13523/v1/bidder/get_deposit?windowNumber=1
Deposit represents the funds in the bidder’s account that can be used to submit bids on the mev-commit p2p-network and settled on-chain.

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Withdraw Deposited Funds

This command will allow you to withdraw funds from the specific window. Window number is the number where the bidder deposited funds.

❯_ terminal
curl -X POST http://localhost:13523/v1/bidder/withdraw?windowNumber=1 \

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Autodeposit Funds

The auto deposit feature allows you to automate the process of depositing funds for the bidder account. This is useful for ensuring your bidder account always has funds available to bid. In order to achieve this, the node will keep issuing deposits for the new windows and also withdrawing funds from the previous windows.

For seamless availability of funds, the deposits would be locked for around 3 windows at a time. So the total amount locked would be 3 * amountPerWindow. The user’s wallet should have enough funds to be able to maintain these deposits as well as cover gas costs to issue transactions.

There are two ways to enable this feature:

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On node boot up

Users can use the command-line or the configuration file to enable this feature on node boot-up. The autodeposit-enabled flag should be set as well as the autodeposit-amount needs to be set to the amount to be deposited in each window.

In order to enable this at node boot up, users needs to fund their wallet before starting the node. So we would need to know the private-key used for the account beforehand.
❯_ terminal
mev-commit --keystore-path ~/.mev-commit \
 --keystore-password <PASSWORD> \
	--bootnodes /dnsaddr/bootnode.testnet.mev-commit.xyz \
	--settlement-rpc-endpoint https://chainrpc.testnet.mev-commit.xyz
  --autodeposit-enabled true
  --autodeposit-amount 1000000000000000000

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Use the Bidder API

Another option to enable this is using the Bidder API.

❯_ terminal
curl -X POST http://localhost:13523/v1/bidder/auto_deposit/1000000000000000000

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Get Auto Deposit Status

To get the status of the auto deposit process:

❯_ terminal
curl -s http://localhost:13523/v1/bidder/auto_deposit_status

​
Cancel Auto Deposit

To cancel the auto deposit process:

❯_ terminal
curl -X POST http://localhost:13523/v1/bidder/cancel_auto_deposit?withdraw=true

This will stop the ongoing auto deposit process.

If withdraw is set, the node will try to withdraw the deposit at the earliest possible time. It might take time before we are able to withdraw from the current window. The bidder node should be running in order to allow this process to complete. If withdraw is not set, the API will return the window numbers which have been already deposited to. The user can then manually issue withdraw at a later point using the API.

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Withdraw Funds

To withdraw funds from the several windows, you can use the following command:

❯_ terminal
curl -X POST http://localhost:13523/v1/bidder/withdraw_from_windows \
-H "Content-Type: application/json" \
-d '{"windowNumbers": [1, 2, 3]}'

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Checking the Balance of your Wallet

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Mainnet

This command will allow you to check your current wallet balance on mainnet mev-commit chain:

❯_ terminal
cast b $ADDRESS --rpc-url https://chainrpc.mev-commit.xyz

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Testnet

This command will allow you to check your current wallet balance on testnet mev-commit chain:

❯_ terminal
cast b $ADDRESS --rpc-url https://chainrpc.testnet.mev-commit.xyz

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Check Total Value Locked in Contracts

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Mainnet

❯_ terminal
python3 -c "print($(cast b 0xb772Add4718E5BD6Fe57Fb486A6f7f008E52167E \
--rpc-url https://chainrpc.mev-commit.xyz) + $(cast b 0xC973D09e51A20C9Ab0214c439e4B34Dbac52AD67 \
--rpc-url https://chainrpc.mev-commit.xyz))"

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Testnet

❯_ terminal
python3 -c "print($(cast b 0x401B3287364f95694c43ACA3252831cAc02e5C41 \
--rpc-url https://chainrpc.testnet.mev-commit.xyz) + $(cast b 0xf4F10e18244d836311508917A3B04694D88999Dd \
--rpc-url https://chainrpc.testnet.mev-commit.xyz))"

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Health

The health endpoint checks whether the bidder node is receiving events from mev-commit chain. This command is useful to determine whether the bidder node has become out of sync (e.g. can’t find the window balance).

❯_ terminal
curl http://localhost:13523/health

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Topology

The topology endpoint can be used to check which provider nodes the bidder node is connected to.

❯_ terminal
curl http://localhost:13523/v1/debug/topology

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Querying for Proposers API

This API is enabled by default, the following environment variables could be set when launching a mev-commit client:

  • MEV_COMMIT_VALIDATOR_ROUTER_ADDR
  • MEV_COMMIT_BEACON_API_URL
  • MEV_COMMIT_L1_RPC_URL

Current address for the ValidatorOptInRouter contract on Holesky is 0x251Fbc993f58cBfDA8Ad7b0278084F915aCE7fc3 and on Mainnet is 0x821798d7b9d57dF7Ed7616ef9111A616aB19ed64.

The default URLs for the Mainnet Beacon Chain and L1 RPC are https://ethereum-beacon-api.publicnode.com and https://ethereum-rpc.publicnode.com, respectively, but you can set your own URLs.

The default URLs for the Testnet Beacon Chain and L1 RPC are https://ethereum-holesky-beacon-api.publicnode.com and https://ethereum-holesky-rpc.publicnode.com, respectively, but you can set your own URLs.

To get the information on whether validators for a specific epoch are opted in to mev-commit:

❯_ terminal
curl http://localhost:13523/v1/validator/get_validators?epoch=1

To get the information on whether validators for a latest epoch are opted in to mev-commit:

❯_ terminal
curl http://localhost:13523/v1/validator/get_validators

You can also subscribe to notifications to receive real-time updates when validators opt in or when a new epoch starts with opted-in validators. To subscribe to these notifications:

❯_ terminal
curl -N -H "Content-Type: application/json" -d '{"topics": ["validator_opted_in", "epoch_validators_opted_in"]}' http://localhost:13523/v1/subscribe

This will establish a streaming connection that will send notifications when:

  • The next block proposer has opted in to the mev-commit protocol (validator_opted_in)
  • A new epoch begins, providing a list of all opted-in validators for that epoch (epoch_validators_opted_in)

Note proposer selection is only stable within the context of the current epoch, and must be checked during the epoch in question. See specification here and here.

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Configuring custom provider sets

Users can also set-up a specific subset of provider nodes in order to send their bids. By default the mev-commit bidder node will send bids to all the available and staked providers. However, if the user wants only a specific subset of providers to be able to see their bids, the can use the --provider-whitelist option to set it up. The list should contain the ethereum wallet addresses of the provider nodes.

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Mainnet

❯_ terminal
mev-commit --keystore-path ~/.mev-commit \
 --keystore-password <PASSWORD> \
	--bootnodes /dnsaddr/bootnode.mev-commit.xyz \
	--settlement-rpc-endpoint https://chainrpc.mev-commit.xyz
  --provider-whitelist 0x6DcE7bcF4fCA9E14b546e583049B82474631b185,0x0979c194EaD08444B6e40415F5822AB32363f580

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Testnet

❯_ terminal
mev-commit --keystore-path ~/.mev-commit \
 --keystore-password <PASSWORD> \
	--bootnodes /dnsaddr/bootnode.testnet.mev-commit.xyz \
	--settlement-rpc-endpoint https://chainrpc.testnet.mev-commit.xyz
  --provider-whitelist 0x6DcE7bcF4fCA9E14b546e583049B82474631b185,0x0979c194EaD08444B6e40415F5822AB32363f580