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Executes a message call immediately without broadcasting a transaction to the network. No gas is consumed on-chain. Used to read contract state or simulate calls.
Flashblocks: Query https://mainnet-preconf.base.org with "pending" to simulate against the current pre-confirmed block state, updated every ~200ms.
eth_call "pending" block context on Flashblocks nodes: Block-context properties (block.number, block.timestamp, block.basefee) may reflect a block several behind tip due to how nodes cache historical Flashblocks. See the FAQ for details.

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Parameters

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transaction
object
required
The transaction call object.
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block
string
required
Block number in hex, or "latest", "pending", "safe", "finalized", "earliest". Use "pending" on a Flashblocks endpoint to call against pre-confirmed state.

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Returns

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result
string
The return value of the call as a hex-encoded byte array.

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Error Codes

CodeMessageDescription
-32000execution revertedThe call reverted. The data field in the error object contains the ABI-encoded revert reason when available.

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Example

curl https://mainnet.base.org \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_call",
    "params": [
      {
        "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "data": "0x70a082310000000000000000000000004200000000000000000000000000000000000006"
      },
      "latest"
    ],
    "id": 1
  }'