Client Settings (Parity, OpenEthereum, Hyperledger Besu, Geth, Ganache)

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Supported Clients
BlockScout currently supports Parity, OpenEthereum, Geth, Nethermind, Hyperledger Besu, and Ganache clients. To define the node variant, it's advised to define the ETHEREUM_JSONRPC_VARIANT environment variable. Correct values include:
1.
parity the same for Parity, OpenEthereum and Nethermind (default)
2.
geth
3.
besu
4.
ganache
BlockScout currently requires a full archive node in order to import every state change for every address on the target network.
Development
Explorer: https://github.com/poanetwork/blockscout/blob/master/apps/explorer/config/dev.exs​
Indexer: https://github.com/poanetwork/blockscout/blob/master/apps/indexer/config/dev.exs​
1
variant =
2
  if is_nil(System.get_env("ETHEREUM_JSONRPC_VARIANT")) do
3
    "ganache"
4
  else
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    System.get_env("ETHEREUM_JSONRPC_VARIANT")
6
    |> String.split(".")
7
    |> List.last()
8
    |> String.downcase()
9
  end
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Production
Explorer: https://github.com/poanetwork/blockscout/blob/master/apps/explorer/config/dev.exs​
Indexer: https://github.com/poanetwork/blockscout/blob/master/apps/indexer/config/prod.exs​
1
variant =
2
  if is_nil(System.get_env("ETHEREUM_JSONRPC_VARIANT")) do
3
    "parity"
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  else
5
    System.get_env("ETHEREUM_JSONRPC_VARIANT")
6
    |> String.split(".")
7
    |> List.last()
8
    |> String.downcase()
9
  end
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OpenEthereum Client
1
--jsonrpc-interface all --jsonrpc-apis web3,eth,net,parity,pubsub,traces --ws-interface all --fat-db=on --pruning=archive --ws-apis all --ws-origins all --ws-hosts all
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Name
Environment Variable
Default Value
Description
HTTP Endpoint
ETHEREUM_JSONRPC_HTTP_URL
​http://localhost:8545​
The HTTP Endpoint is used to fetch blocks, transactions, receipts, coin/token balances.
Tracing Endpoint
ETHEREUM_JSONRPC_TRACE_URL
​http://localhost:8545​
The Tracing endpoint is used to fetch internal transactions and block traces. In most cases this endpoint is identical to the HTTP Endpoint.
WebSockets Endpoint
ETHEREUM_JSONRPC_WS_URL
ws://localhost:8546
The WebSockets endpoint subscribes to newHeads which alerts the indexer to fetch the new block from the subscription.
Development
Explorer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/explorer/config/dev/parity.exs#L8-L22​
Indexer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/indexer/config/dev/parity.exs#L9-L23​
Production
Explorer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/explorer/config/prod/parity.exs#L8-L22​
Indexer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/indexer/config/prod/parity.exs#L9-L23​
Geth Client
More information on Geth JSON-RPC available here.
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sudo /usr/bin/geth --http --http.addr 0.0.0.0 --port 30303 --http.port 8545 --http.api debug,net,eth,shh,web3,txpool --wsapi "eth,net,web3,network,debug,txpool" --ws --ws.addr 0.0.0.0 --ws.port 8546 --wsorigins "*" --rinkeby --datadir=/rinkeby --syncmode=full --gcmode=archive --http.vhosts=*
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Tracing and pruning: By default, state for the last 128 blocks kept in memory. Most states are garbage collected. If you are running a block explorer or other service relying on transaction tracing without an archive node (--gcmode=archive), you need to trace within this window! Alternatively, specify the "reexec" tracer option to allow regenerating historical state; and ideally switch to chain tracing which amortizes overhead across all traced blocks.
Name
Environment Variable
Default Value
Description
HTTP Endpoint
ETHEREUM_JSONRPC_HTTP_URL
​http://localhost:8545​
The HTTP Endpoint is used to fetch blocks, transactions, receipts, coin/token balances.
WebSockets Endpoint
ETHEREUM_JSONRPC_WS_URL
ws://localhost:8546
The WebSockets endpoint subscribes to newHeads which alerts the indexer to fetch the new block from the subscription.
Development
Explorer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/explorer/config/dev/geth.exs#L8-L17​
Indexer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/indexer/config/dev/geth.exs#L9-L18​
Production
Explorer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/explorer/config/prod/geth.exs#L8-L17​
Indexer: https://github.com/poanetwork/blockscout/blob/59d8423e7ca3f608dbea411d4a0dc9bb4662a891/apps/indexer/config/prod/geth.exs#L9-L18​
Umbrella Project Organization
Deployment Differences Between Chains
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