Call Contract

Invoke a smart contract

Invoke a smart contract

Returns a result from EVM execution such as cost-free execution of read-only smart contract queries, gas estimation, and transient simulation of read-write operations. If estimate field is set to true gas estimation is executed. Currently we support only latest block.

The table below defines the restrictions and support for the endpoint

Estimate	Operation Type	Mirror Node Version
false	static contract state reads for non precompile functions	0.78+
	static contract state reads for precompile functions except allowance/isApprovedForAll	0.78+
	static contract state reads for precompile functions with allowance	0.79+
	static contract state reads for precompile functions with isApprovedForAll	0.81+
	non-static contract state reads for non precompile functions	0.83+
	non-static contract state reads for precompile read only functions	0.83+
true	non-static contract state reads and modifications for non precompile functions except lazy account creation	0.83+
	non-static contract state reads and modifications for associate precompile functions	0.83+
	non-static contract state reads and modifications for non precompile functions with lazy account creation	0.84+
	non-static contract state reads and modifications for precompile functions except associate	Not supported

The operations types which are not currently supported should return 501 error status.

POSThttps://mainnet.hedera.validationcloud.io/v1/YOUR_API_KEY/api/v1/contracts/call

Body

application/json

blocknullable string

Hexadecimal block number or the string "latest", "pending", "earliest". Defaults to "latest".

datanullable string (binary)

Hexadecimal method signature and encoded parameters.

estimatenullable boolean

Whether gas estimation is called. Defaults to false.

fromnullable string (binary)

The 20-byte hexadecimal EVM address the transaction is sent from.

gasnullable integer (int64)

Gas provided for the transaction execution. Defaults to 120000000.

gasPricenullable integer (int64)

Gas price used for each paid gas.

to*string (binary)

The 20-byte hexadecimal EVM address the transaction is directed to.

valuenullable integer (int64)

Value sent with this transaction. Defaults to 0.

Response

200400404415429500501

OK

Body

application/json

resultstring (binary)

Result in hexadecimal from executed contract call.

Request

JavaScriptCurl

const response = await fetch('https://mainnet.hedera.validationcloud.io/v1/YOUR_API_KEY/api/v1/contracts/call', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "to": "0x00000000000000000000000000000000000003f4"
    }),
});
const data = await response.json();

Response

{
  "result": "0x94c4d54535f6e616d6500"
}