TriggerSmartContract

post

https://api.shasta.trongrid.io/wallet/triggersmartcontract

Construct an unsigned smart-contract call transaction and return TransactionExtension for client-side signing and broadcast.

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Construct an unsigned smart-contract call transaction. The response returns TransactionExtension; the caller signs the transaction locally and then broadcasts it.

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ABI parameter encoding
The parameter field must be encoded according to the Solidity ABI rules. For examples, see the Solidity ABI specification and Parameter and return value encoding and decoding.

Related resources

GetContractInfo — query contract deployment information, including ABI, bytecode, and Energy settings
TriggerConstantContract — simulate a read-only call without broadcasting a transaction
Sign and broadcast — the API workflow — this API returns an unsigned transaction that must be signed, broadcast, and confirmed
FeeLimit & Energy cost — fee_limit, Energy sharing, and deployer-side contribution
TVM vs. EVM — opcode differences and migration notes

Body Params

owner_address

string

required

Transaction initiator address. (Format: Base58 or Hex)

contract_address

string

required

Contract address. (Format: Base58 or Hex).
Example: TG3XXyExBkPp9nzdajDZsozEu4BkaSJozs

function_selector

string

Function selector.
Example: transfer(address,uint256)

parameter

string

ABI-encoded function parameters (Hex String).
e.g., 00000000000000000000004115208EF33A926919ED270E2FA61367B2DA3753DA0000000000000000000000000000000000000000000000000000000000000032

data

string

This field transmits the necessary data for smart contract interaction, including the function being called and its parameters. You may choose to use the data field, which contains the complete ABI-encoded information, or use the function_selector and parameter fields separately. Note that if both data and function_selector are present, the system will prioritize using the function_selector and parameter fields for the contract interaction.

fee_limit

int32

required

Maximum TRX (in sun) the caller agrees to pay for transaction fees. (Unit: sun). Example: 1000000000 (1,000 TRX)

call_value

int64

Defaults to 0

Amount of TRX transferred into the contract. (Unit: sun)

call_token_value

int64

Amount of TRC-10 token transferred into the contract.

token_id

int64

TRC-10 token ID

visible

boolean

Defaults to true

Optional. Set to true to format addresses in Base58; set to false for hex format. (Default: false)

Responses

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Response

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ABI parameter encoding

Related resources

200Successful response.

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