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​
Parameters

​
chainId
string
default:"1001"
required
Unique identifier for a blockchain network.
​
id
number
default:1
required
Request identifier used to match responses.
​
jsonrpc
string
default:"2.0"
required
JSON-RPC version.
​
method
string
default:"eth_estimateGas"
required
JSON-RPC method name.
​
params
object
required
Two-element array: [modified transaction object, default block]. The transaction omits “nonce” and allows optional “from”.Positional parameters for eth_estimateGas:
  • params[0]: Legacy transaction (pre-EIP-2718).
  • params[1]: Block identifier. Can be an integer block number or a string tag: “latest”, “earliest”, or “pending”.

​
Returns

​
result
string
The amount of gas used. Example: “0x5208”.
curl --request POST \
  --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=1001 \
  --header 'content-type: application/json' \
  --data '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
      {},
      0
    ]
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x5208"
}