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Verus Bridgekeeper

Verus Bridgekeeper is a node js application passing transactions between Verus and Ethereum blockchains.

To install Verus Bridgekeeper complete the following steps:

Installing NVM, node, yarn & pm2

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.5/install.sh | bash
# you may need to log out and log back in or source your shell profile at this step
nvm install 18
npm install -g pm2 yarn

Installing the Bridgekeeper

cd ~
git clone https://github.com/VerusCoin/Verusbridgekeeper.git
cd ~/Verusbridgekeeper
yarn install

Then after the installation run the following to create the initial configuration file

yarn start

It will exit with an error after creating a template configuration file for you to edit/populate.

In *.conf set:

delegatorcontractaddress= The bridge delegator contract address provided after the contracts have been launched

ethnode=wss:// to a websocket address for an Ethereum node

Only for witnesses:

privatekey= the private key (in hex, no leading 0x) of an ethereum account on the mainnet (goerli on testnet) chain with sufficient funds, to provide gas for calls to the contracts.

(mainnet)
Apple: /Library/Application Support/Verus/pbaas/52c7a71ed15802d33778235e7988d61339b84c45/52c7a71ed15802d33778235e7988d61339b84c45.conf
Linux: ~/.verus/pbaas/52c7a71ed15802d33778235e7988d61339b84c45/52c7a71ed15802d33778235e7988d61339b84c45.conf
Windows: %appdata%\Verus\pbaas\52c7a71ed15802d33778235e7988d61339b84c45\52c7a71ed15802d33778235e7988d61339b84c45.conf

(testnet)
Apple: /Library/Application Support/Verustest/pbaas/000b090bec6c9ff28586eb7ed24e77562f0c4667/000b090bec6c9ff28586eb7ed24e77562f0c4667.conf
Linux: ~/.verustest/pbaas/000b090bec6c9ff28586eb7ed24e77562f0c4667/000b090bec6c9ff28586eb7ed24e77562f0c4667.conf
Windows: %appdata%\Verustest\pbaas\000b090bec6c9ff28586eb7ed24e77562f0c4667\000b090bec6c9ff28586eb7ed24e77562f0c4667.conf

To set the wallet not to spend (but still enable revoke) please edit the above *.conf file and add:

nowitnesssubmissions=true

Running the bridgekeeper on the console:

The following command will start the bridgekeeper from the command line

yarn start -log [-debug] [-debugnotarization] [-testnet]
Optional flags:

-debug                Shows extra information
-debugnotarization    Shows debug information
-testnet              Runs the Bridgekeeper for the Verus testnet

Running the bridgekeeper in PM2:

cd ~/Verusbridgekeeper;  pm2 start start.js --name bridgekeeper -- -consolelog

or create a shell script (in ~/bin) for convenient starting and start that using ~/bin/startbridge.sh:

cat << EOF > ~/bin/startbridge.sh
#!/bin/bash
cd ~/Verusbridgekeeper;  pm2 start start.js --name bridgekeeper -- -consolelog
EOF
chmod +x ~/bin/startbridge.sh

When using PM2, console logs are stored in ~/.pm2/logs/bridgekeeper-out.log and the errors in ~/.pm2/logs/bridgekeeper-error.log

This will result in the service running on port 8002 it can be queried using the following examples:

curl -u userXXX:passXXX --data-binary '{"jsonrpc":"1.0","id":"curltext","method":"getinfo","params":[]}' -H 'content-type:text/plain;' http://127.0.0.1:8002

curl -u userXXX:passXXX --data-binary '{"jsonrpc":"1.0","id":"curltext","method":"getcurrency","params":["iCtawpxUiCc2sEupt7Z4u8SDAncGZpgSKm"]}' -H 'content-type:text/plain;' http://127.0.0.1:8002

Optional: logrotate with PM2

As root user, create a file called /etc/logrotate.d/verusd-rpc with these contents:

/home/verus/.komodo/VRSC/debug.log
/home/verusd-rpc/.pm2/logs/verusbridge-out.log
/home/verusd-rpc/.pm2/logs/verusbridge-error.log
{
  rotate 14
  daily
  compress
  delaycompress
  copytruncate
  missingok
  notifempty
}

======= #Updgrading contracts utility

Run yarn run getcontracthash from the main directory.

Using the Verus Utilities to revoke and recover addresses.

In the /utiliites folder there is a file called upgrade.js . It handles contract upgrades and also revoking and recovering identities. For it to be able to revoke it needs to be able to interact with the contract and send a transaction using the notaries main key.

To revoke

Your private key in you veth pbaas conf file should be your main spend address.

node upgrade.js -revoke

To recover to a new main address / recover address

Setup a connection between the utility and the verus daemon. The daemon needs to have the R address in its wallet for the current recovery address in the notary setup on Ethereum. (The utility will look in the verus.conf file for the RPC connection details). e.g. in /.komodo/VRSC/VRSC.conf

node upgrade.js -recover 'notaries i-address' 'ETH address of main signer' 'ETH address of recover' 'R-address of current ETH recovery' [-testnet]

e.g. node upgrade.js -recover iKjrTCwoPFRk44fAi2nYNbPG16ZUQjv1NB 0xD3258AD271066B7a780C68e527A6ee69ecA15b7F 0x68f56bA248E23b7d5DE4Def67592a1366431d345 RH7h8p9LN2Yb48SkxzNQ29c1Ltfju8Cd5i

Multisig revoke and recover

For the notaries, a quorum is required to revoke or recover another notary. The notaries first have to agree on the new notaries signing and recover ETH addresses.

Once they are decided each notary can make a packet of information that when put together it makes a upgrade script that the contract can accept and upgrade.

(see recovermutisig.json and revokemultisig.json for examples)

To make the revoke data

node upgrade.js -createmultisigrevoke 'your notaries i-address' 'notary to be revoked' 'R-address of your notaries primary key' [-testnet]

e.g.

node upgrade.js -createmultisigrevoke iKjrTCwoPFRk44fAi2nYNbPG16ZUQjv1NB iChhvvuUPn7xh41tW91Aq29ah9FNPRufnJ RLXCv2dQPB4NPqKUweFx4Ua5ZRPFfN2F6D

To make the recover data

node upgrade.js -createmultisigrecover 'your notaries i-address' 'notary to be revoked' 'R-address of your notaries recovery' 'notaries new main ETH address' 'notaries new recovery ETH address' [-testnet]

e.g.

node upgrade.js -createmultisigrecover iKjrTCwoPFRk44fAi2nYNbPG16ZUQjv1NB iChhvvuUPn7xh41tW91Aq29ah9FNPRufnJ REXBEDfAz9eJMCxdexa5GnWQBAax8hwuiu 0x68f56bA248E23b7d5DE4Def67592a1366431d345 0xD010dEBcBf4183188B00cafd8902e34a2C1E9f41

To revoke an address with multisig

As above there needs to be a connection from the utility to a verus daemon running with the R address that can sign for the notaries recover key.

node upgrade.js -revokemultisig [-testnet]

To recover an address with multisig

As above there needs to be a connection from the utility to a verus daemon running with the R address that can sign for the notaries recover key.

node upgrade.js -recovermultisig [-testnet]

To Create a contract upgrade hash

node upgrade.js -getcontracthash -contracttype 0 -contractaddress 0xe20Aa3a102e4326B1D86683d493E854A792baB41 [-testnet]

NOTE: the upgraded contract MUST have a initialize() function in it as below to be able to upgrade.

function initialize() external { }

To execute a contract upgrade once there is more than 51 votes

 node upgrade.js -upgradecontracts -contracttype 0 -contractaddress 0xf2bF96D603b54f96a0BF6F72305A84813C90b345 [-testnet] -salt 0xaae83c4ccbadca1ce6478b031bb4444ac0d375a56886a9d4a8dfe2116763dcbf

To check the balance of the DAI DSR Interest and burn it back

Only put the -burn flag on to actually execute the transaction.

node burndai.js [-burn]