tokenbridge/CONFIGURATION.md

Configuration

Common configuration

name	description	value
COMMON_HOME_RPC_URL	The HTTPS URL(s) used to communicate to the RPC nodes in the Home network. Several URLs can be specified, delimited by spaces. If the connection to one of these nodes is lost the next URL is used for connection.	URL(s)
COMMON_FOREIGN_RPC_URL	The HTTPS URL(s) used to communicate to the RPC nodes in the Foreign network. Several URLs can be specified, delimited by spaces. If the connection to one of these nodes is lost the next URL is used for connection.	URL(s)
COMMON_HOME_BRIDGE_ADDRESS	The address of the bridge contract address in the Home network. It is used to listen to events from and send validators' transactions to the Home network.	hexidecimal beginning with "0x"
COMMON_FOREIGN_BRIDGE_ADDRESS	The address of the bridge contract address in the Foreign network. It is used to listen to events from and send validators' transactions to the Foreign network.	hexidecimal beginning with "0x"
COMMON_HOME_GAS_PRICE_SUPPLIER_URL	The URL used to get a JSON response from the gas price prediction oracle for the Home network. The gas price provided by the oracle is used to send the validator's transactions to the RPC node. Since it is assumed that the Home network has a predefined gas price (e.g. the gas price in the Core of POA.Network is 1 GWei), the gas price oracle parameter can be omitted for such networks.	URL
COMMON_HOME_GAS_PRICE_SPEED_TYPE	Assuming the gas price oracle responds with the following JSON structure: {"fast": 20.0, "block_time": 12.834, "health": true, "standard": 6.0, "block_number": 6470469, "instant": 71.0, "slow": 1.889}, this parameter specifies the desirable transaction speed. The speed type can be omitted when COMMON_HOME_GAS_PRICE_SUPPLIER_URL is not used.	instant / fast / standard / slow
COMMON_HOME_GAS_PRICE_FALLBACK	The gas price (in Wei) that is used if both the oracle and the fall back gas price specified in the Home Bridge contract are not available.	integer
COMMON_HOME_GAS_PRICE_FACTOR	A value that will multiply the gas price of the oracle to convert it to gwei. If the oracle API returns gas prices in gwei then this can be set to 1. Also, it could be used to intentionally pay more gas than suggested by the oracle to guarantee the transaction verification. E.g. 1.25 or 1.5.	integer
COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URL	The URL used to get a JSON response from the gas price prediction oracle for the Foreign network. The provided gas price is used to send the validator's transactions to the RPC node. If the Foreign network is Ethereum Foundation mainnet, the oracle URL can be: https://gasprice.poa.network. Otherwise this parameter can be omitted.	URL
COMMON_FOREIGN_GAS_PRICE_SPEED_TYPE	Assuming the gas price oracle responds with the following JSON structure: {"fast": 20.0, "block_time": 12.834, "health": true, "standard": 6.0, "block_number": 6470469, "instant": 71.0, "slow": 1.889}, this parameter specifies the desirable transaction speed. The speed type can be omitted when COMMON_FOREIGN_GAS_PRICE_SUPPLIER_URLis not used.	instant / fast / standard / slow
COMMON_FOREIGN_GAS_PRICE_FALLBACK	The gas price (in Wei) used if both the oracle and fall back gas price specified in the Foreign Bridge contract are not available.	integer
COMMON_FOREIGN_GAS_PRICE_FACTOR	A value that will multiply the gas price of the oracle to convert it to gwei. If the oracle API returns gas prices in gwei then this can be set to 1. Also, it could be used to intentionally pay more gas than suggested by the oracle to guarantee the transaction verification. E.g. 1.25 or 1.5.	integer

Oracle configuration

name	description	value
ORACLE_BRIDGE_MODE	The bridge mode. The bridge starts listening to a different set of events based on this parameter.	NATIVE_TO_ERC / ERC_TO_ERC / ERC_TO_NATIVE
ORACLE_ALLOW_HTTP_FOR_RPC	Only use in test environments - must be omitted in production environments.. If this parameter is specified and set to yes, RPC URLs can be specified in form of HTTP links. A warning that the connection is insecure will be written to the logs.	yes / no
ORACLE_HOME_RPC_POLLING_INTERVAL	The interval in milliseconds used to request the RPC node in the Home network for new blocks. The interval should match the average production time for a new block.	integer
ORACLE_FOREIGN_RPC_POLLING_INTERVAL	The interval in milliseconds used to request the RPC node in the Foreign network for new blocks. The interval should match the average production time for a new block.	integer
ORACLE_HOME_GAS_PRICE_UPDATE_INTERVAL	An interval in milliseconds used to get the updated gas price value either from the oracle or from the Home Bridge contract.	integer
ORACLE_FOREIGN_GAS_PRICE_UPDATE_INTERVAL	The interval in milliseconds used to get the updated gas price value either from the oracle or from the Foreign Bridge contract.	integer
ORACLE_QUEUE_URL	RabbitMQ URL used by watchers and senders to communicate to the message queue. Typically set to: amqp://127.0.0.1.	local URL
ORACLE_REDIS_URL	Redis DB URL used by watchers and senders to communicate to the database. Typically set to: redis://127.0.0.1:6379.	local URL
ORACLE_HOME_START_BLOCK	The block number in the Home network used to start watching for events when the bridge instance is run for the first time. Usually this is the same block where the Home Bridge contract is deployed. If a new validator instance is being deployed for an existing set of validators, the block number could be the latest block in the chain.	integer
ORACLE_FOREIGN_START_BLOCK	The block number in the Foreign network used to start watching for events when the bridge instance runs for the first time. Usually this is the same block where the Foreign Bridge contract was deployed to. If a new validator instance is being deployed for an existing set of validators, the block number could be the latest block in the chain.	integer
ORACLE_LOG_LEVEL	Set the level of details in the logs.	trace / debug / info / warn / error / fatal
ORACLE_MAX_PROCESSING_TIME	The workers processes will be killed if this amount of time (in milliseconds) is elapsed before they finish processing. It is recommended to set this value to 4 times the value of the longest polling time (set with the HOME_POLLING_INTERVAL and FOREIGN_POLLING_INTERVAL variables). To disable this, set the time to 0.	integer
ORACLE_VALIDATOR_ADDRESS_PRIVATE_KEY	The private key of the bridge validator used to sign confirmations before sending transactions to the bridge contracts. The validator account is calculated automatically from the private key. Every bridge instance (set of watchers and senders) must have its own unique private key. The specified private key is used to sign transactions on both sides of the bridge.	hexidecimal without "0x"
ORACLE_VALIDATOR_ADDRESS	The public address of the bridge validator	hexidecimal with "0x"
ERC20_TOKEN_ADDRESS	address of token for ERC-TO-ERC type of bridge	hexidecimal with "0x"

UI configuration

name	description	value
UI_TITLE	The title for the bridge UI page. %c will be replaced by the name of the network.	string
UI_DESCRIPTION	The meta description for the deployed bridge page.	string
UI_NATIVE_TOKEN_DISPLAY_NAME	name of the home native coin	string
UI_HOME_NETWORK_DISPLAY_NAME	name to be displayed for home network	string
UI_FOREIGN_NETWORK_DISPLAY_NAME	name to be displayed for foreign network	string
UI_HOME_WITHOUT_EVENTS	true if home network doesn't support events	true/false
UI_FOREIGN_WITHOUT_EVENTS	true if foreign network doesn't support events	true/false
UI_HOME_EXPLORER_TX_TEMPLATE	template link to transaction on home explorer. %s will be replaced by transaction hash	URL template
UI_FOREIGN_EXPLORER_TX_TEMPLATE	template link to transaction on foreign explorer. %s will be replaced by transaction hash	URL template
UI_HOME_EXPLORER_ADDRESS_TEMPLATE	template link to address on home explorer. %s will be replaced by address	URL template
UI_FOREIGN_EXPLORER_ADDRESS_TEMPLATE	template link to address on foreign explorer. %s will be replaced by address	URL template
UI_HOME_GAS_PRICE_UPDATE_INTERVAL	An interval in milliseconds used to get the updated gas price value either from the oracle or from the Home Bridge contract.	integer
UI_FOREIGN_GAS_PRICE_UPDATE_INTERVAL	An interval in milliseconds used to get the updated gas price value either from the oracle or from the Foreign Bridge contract.	integer
UI_PORT	The port for the UI app.	integer
UI_STYLES	The set of styles to render the bridge UI page. Currently only classic is implemented	classic

Monitor configuration

name	description	value
MONITOR_HOME_START_BLOCK	The app will monitor transactions starting from this block.	integer
MONITOR_FOREIGN_START_BLOCK	The app will monitor transactions starting from this block.	integer
MONITOR_VALIDATOR_HOME_TX_LIMIT	Average gas usage of a transaction sent by a validator, it is used to estimate the number of transaction that can be paid by the validator.	integer
MONITOR_VALIDATOR_FOREIGN_TX_LIMIT	Average gas usage of a transaction sent by a validator, it is used to estimate the number of transaction that can be paid by the validator.	integer
MONITOR_TX_NUMBER_THRESHOLD	If estimated number of transaction is equal to or below this value, the monitor will report that the validator has less funds than it is required.	integer
MONITOR_PORT	The port for the Monitor.	integer