Run a node with binary

Download binary file (recommend to download in a specify directory), check from here

curl -L -o bevm <release url>

Unzip the tar file

tar -zxvf bevm

To run stably in the background, use systemd

sudo vim /etc/systemd/system/bevm.service

Remember to replace the corresponding content with the following systemd statements.

Description=BEVM Node
ExecStart=<your binary location> --name "Your-Node-Name" \
--chain mainnet \
--db-cache 2048 \
--telemetry-url 'wss:// 1' \
--port 30333 \
--rpc-port 8087 \
--rpc-methods Unsafe \
--validator \
--no-mdns \
--unsafe-rpc-external \
--offchain-worker when-authority
User=<your vps user name>

Reload its configuration file

sudo systemctl daemon-reload

Start the service

sudo systemctl start bevm.service

Check service status

sudo systemctl status bevm.service

Register your own Validator node using the path below


The initialBond value must be at least 1000 BEVM, and then submit the transaction

Get your session keys by curl

Get your session key in the result

curl -H "Content-Type: application/json" -d '{"id":1, "jsonrpc":"2.0", "method": "author_rotateKeys", "params":[]}' http://localhost:8087

(Example) Copy the object result


Set your session keys

Check the session key setting

curl -H "Content-Type: application/json" -d '{"id":1, "jsonrpc":"2.0", "method": "xstaking_checkCandidate", "params":["your address"]}' http://localhost:8087

Remember to replace your address

Find your node election on the wallet frontend

Some interpretations on election and node requirements

Backup Nodes

Due to the fact that improper deployment of nodes can lead to block production anomalies, which may incur certain penalties, it is advisable to set up additional backup nodes. Copy the same config.json configuration file and keys, and simply change the option to "validator=false." Start the backup node in "pruning=archive" mode. This way, if the main node encounters issues, the backup node can take over the work to avoid penalty.

Block verification

The rotation period for validation nodes Era = 12 Session = 12 * 5 Minutes = 1 hour

This means that after the setup is complete, you have to wait up to an hour for the new validation nodes to start producing blocks.

After being elected as a validator, if you see Prepared block for proposing at ... in the logs, it indicates that the node has successfully produced a block.

2024-01-30 17:39:42:008 INFO tokio-runtime-worker sc_basic_authorship::basic_authorship  🙌 Starting consensus session on top of parent 0xe05e784c7198ff0719411ed75fe3a207f7fdc89b0ed5e3fbae75a3f2a7bf5504
2024-01-30 17:39:42:021 INFO tokio-runtime-worker sc_basic_authorship::basic_authorship  🎁 Prepared block for proposing at 4002 (13 ms) [hash: 0x236a33a2f071abb9f0f4ee31a367b509c560018807bf21b454ea0d368cd8812a; parent_hash: 0xe05e…5504; extrinsics (4): [0x8d22…b8ad, 0x9b60…0aa1, 0xccdc…3742, 0x56df…c0a3]
2024-01-30 17:39:42:027 INFO tokio-runtime-worker babe  🔖 Pre-sealed block for proposal at 4002. Hash now 0x4c4eec78a6f480a337f2ddd79c5f839959d8e082e3ec9f4adc7f640f70d66024, previously 0x236a33a2f071abb9f0f4ee31a367b509c560018807bf21b454ea0d368cd8812a.

Validator Node Election

Disqualified from running

When the validator node's reward pool is penalized to zero or subject to other penalties, the validator node is removed from the current validator set and becomes a candidate for re-election. To participate in staking again, they need to manually re-enter the election.

Opt out voluntarily

When you want to drop your node or do anything that will cause your node machine down, you need to drop your role on your own firstly to avoid the penalties.

After the signatures, you will find you are dropped.

Run for election manually

If you want to be in line for the node, you can click the "Candidate" here to unlock more operations.

After the signatures, you will find you are in waiting.

Key Points

Before the first halving (which occurs every 4 years), 625 BEVM are issued for every 5-minute session, with 20% going directly to validators and 80% temporarily stored in their reward pool.

Validator elections take place every 12 sessions (1 hour).

If a node's self-staked amount is less than 100 BEVM or the total number of votes received is less than 1000 BEVM, it will be forcibly retired from the validator election.

Validator nodes in candidate status are neither rewarded nor penalized.

Node Penalty

BEVM rewards each session but also penalizes nodes that may act maliciously. Typical penalties include penalties for double-signing and node offlining. If a node is discovered to be acting maliciously, the rewards due for that node in the session will be entirely penalized into the Treasury, and the node's reward pool will be penalized in accordance with the malice coefficient reported on the chain, which is:

penalty = max(session_bevm_reward + reward_pot_balance * F, minimum_penalty)

BEVM verification nodes, when found to be malicious, are not penalized by losing their principal investment nor the BTC gas in the prize pool; instead, the penalty is exacted from the BEVM in the node's prize pool.

Once the node's prize pool has been completely depleted by penalties, the node is forcibly deselected.

if penalty > reward_pot_balance {
// force the validator(offender) to be chilled

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