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eth_estimateGas

Polygon / https://triport.io/polygon

Minimum tier: Free

Polygon method guide

Last updated:

eth_estimateGas generates and returns an estimate of how much gas is necessary to allow a transaction to complete. The transaction is not added to the blockchain — the node simulates execution against the chosen block state and returns the gas amount the EVM would charge.

Use it to set the gas (gas limit) field before signing and submitting a transaction with eth_sendRawTransaction, and to sanity-check that a contract call will not revert before you pay for it. If the call would revert, the estimate fails with a transaction-rejected error rather than returning a number.

Polygon gotcha — congestion variance. On Polygon, gas estimates can move sharply during periods of high contention (for example, large NFT mint events), so a value estimated a few seconds before submission may no longer be enough by the time the transaction lands. Automated senders and bots should add a 20–50% buffer on top of the returned estimate to avoid out of gas failures. Note this method runs full EVM execution and is heavier than a plain read, so it is throttled harder than light read methods.

Parameters

This method takes no parameters.

Returns

eth_estimateGas return value
FieldType
resultobject

Examples

curl https://triport.io/polygon \
  -X POST -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer <api-key>' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_estimateGas","params":[]}'
const res = await fetch("https://triport.io/polygon", {
  method: "POST",
  headers: { "Content-Type": "application/json", Authorization: "Bearer <api-key>" },
  body: JSON.stringify({
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_estimateGas",
  "params": []
}),
});
const data = await res.json();
import requests
resp = requests.post(
    "https://triport.io/polygon",
    headers={"Authorization": "Bearer <api-key>"},
    json={"jsonrpc":"2.0","id":1,"method":"eth_estimateGas","params":[]},
)
print(resp.json())

Usage

  1. Transport: HTTP (JSON-RPC).
  2. Chain: Polygon.
  3. Clusters: mainnet.
  4. Credit cost: 1 per call.

FAQ

What does eth_estimateGas do?
Estimates how much gas a transaction would consume on Polygon, without broadcasting it to the network.
How many credits does eth_estimateGas cost?
eth_estimateGas costs 1 credit(s) per call on Triport by default.
Is eth_estimateGas available over WebSocket?
eth_estimateGas is an HTTP JSON-RPC method.