ONT Contract API

Please install Ontology SDKs before using the APIs introduced below.

Index

• BalanceOf

• BalanceOfV2

• Transfer

• TransferV2

• MultiTransfer

• MultiTransferV2

• Approve

• ApproveV2

• Allowance

• AllowanceV2

• TransferFrom

• TransferFromV2

Methods

BalanceOf

Fetch the balance of a specific address.

ontSdk.Native.Ont.BalanceOf(address common.Address) (uint64, error)

BalanceOfV2

Fetch the balance of a specific address.

ONT has 9 decimals.

ontSdk.Native.Ont.BalanceOfV2(address common.Address) (*big.Int, error)

Transfer

Initiate a transaction.

ontSdk.Native.Ont.Transfer(gasPrice, gasLimit uint64, from *Account, to common.Address, amount uint64) (common.Uint256, error)

Emit a corresponding contract event. For example:

{
"ContractAddress": "0100000000000000000000000000000000000000",
"States": [
"transfer",
"APS1wGGVUjsJYLUvncckzgsdqGT3KRqMtx",
"AFmseVrdL9f9oyCzZefL9tG6UbviEH9ugK",
200
]
}

TransferV2

Initiate a transaction.

ONT has 9 decimals.

ontSdk.Native.Ont.TransferV2(gasPrice, gasLimit uint64, from *Account, to common.Address, amount *big.Int) (common.Uint256, error)

If the transfer amount is divisible by 10^9, the event emitted will be the same as the one by Transfer.

Otherwise, the amount consists of two integers. The first one represents amount/10^9, and the second one represents amount%10^9. For example, if the transaction amount is 123.4567 ONT, the event looks like:

{
"ContractAddress": "0100000000000000000000000000000000000000",
"States": [
"transfer",
"APS1wGGVUjsJYLUvncckzgsdqGT3KRqMtx",
"AFmseVrdL9f9oyCzZefL9tG6UbviEH9ugK",
123，
4567
]
}

MultiTransfer

Initiate a batch transfer from one address to multiple addresses.

ontSdk.Native.Ont.MultiTransfer(gasPrice, gasLimit uint64, states []*ont.State, signer *Account) (common.Uint256, error)

MultiTransferV2

Initiate a batch transfer from one address to multiple addresses.

ONT has 9 decimals.

ontSdk.Native.Ont.MultiTransferV2(gasPrice, gasLimit uint64, states []*ont.State, signer *Account) (common.Uint256, error)

Approve

Approve tokens to be withdrawn as allowance.

ontSdk.Native.Ont.Approve(gasPrice, gasLimit uint64, from *Account, to common.Address, amount uint64) (common.Uint256, error)

ApproveV2

Approve tokens to be withdrawn as allowance.

ONT has 9 decimals.

ontSdk.Native.Ont.ApproveV2(gasPrice, gasLimit uint64, from *Account, to common.Address, amount *big.Int) (common.Uint256, error)

Allowance

Return the allowance from the from account to the to account.

ontSdk.Native.Ont.Allowance(from, to common.Address) (uint64, error)

AllowanceV2

Return the allowance from the from account to the to account.

ONT has 9 decimals.

ontSdk.Native.Ont.AllowanceV2(from, to common.Address) (*big.Int, error)

TransferFrom

Allow tokens to be transferred from allowance.

ontSdk.Native.Ont.TransferFrom(gasPrice, gasLimit uint64, sender *Account, from, to common.Address, amount uint64) (common.Uint256, error)

TransferFromV2

Allow tokens to be transferred from allowance.

ONT has 9 decimals.

ontSdk.Native.Ont.TransferFromV2(gasPrice, gasLimit uint64, sender *Account, from, to common.Address, amount *big.Int) (common.Uint256, error)