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Environment variables

Some behavior of Blockbook can be modified by environment variables. The variables usually start with a coin shortcut to allow to run multiple Blockbooks on a single server.

  • <coin shortcut>_WS_GETACCOUNTINFO_LIMIT - Limits the number of getAccountInfo requests per websocket connection to reduce server abuse. Accepts number as input.

  • <coin shortcut>_STAKING_POOL_CONTRACT - The pool name and contract used for Ethereum staking. The format of the variable is <pool name>/<pool contract>. If missing, staking support is disabled.

  • COINGECKO_API_KEY or <coin shortcut>_COINGECKO_API_KEY - API key for making requests to CoinGecko in the paid tier.

  • <coin shortcut>_ALLOWED_ETH_CALL_CONTRACTS - Contract addresses for which ethCall websocket requests can be made, as a comma-separated list. If omitted, ethCall is enabled for all addresses.