Queries

Queries are requests that do not require network consensus. Queries are processed only by the single node the request is sent to. Below is a list of network queries by service.

Cryptocurrency Accounts

File Service

Smart Contracts

AccountBalanceQuery

FileContentsQuery

ContractCallQuery

AccountInfoQuery

FileInfoQuery

ContractByteCodeQuery

AccountRecordQuery

ContractInfoQuery

ContractRecordQuery

The following methods can be called when building the above queries

Method

Type

Description

setQueryPayment(<paymentAmount>)

Hbar/long

Explicitly specify that the operator account is paying for the query; when the query is executed a payment transaction will be constructed with a transfer of this amount from the operator account to the node which will handle the query.

setMaxQueryPayment(<paymentAmount>)

Hbar/long

The maximum payment amount to be paid for this query. The actual payment amount may be less, but will never be greater than this value.

getCost(<client>)

Client

Returns the cost of the query prior to submitting the request

execute(<client>)

Client

Submits the transaction to the Hedera network