TRC20 Contract Interaction

Take the USDT contract as an example，Use tronweb and wallet-cli to call the TRC20 interface of the contract, respectively.
# name
Call the name function to get the name of the token.
**HTTP API : ** 
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**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage : **TriggerConstantContract [ownerAddress] [contractAddress] [method] [args] [isHex]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
# symbol
Call the symbol function to get the symbol of the token.
**HTTP API : ** 
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**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage : **TriggerConstantContract [ownerAddress] [contractAddress] [method] [args] [isHex]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
# decimals
Call the decimals function to get the precision of the token.
**HTTP API : ** 
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**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage : **TriggerConstantContract [ownerAddress] [contractAddress] [method] [args] [isHex]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
# totalSupply
Call the totalSupply function  to get the total supply of the token.
**HTTP API : ** 
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**Tronweb Example:**
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**Wallet-cli:**
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**Usage : **TriggerConstantContract [ownerAddress] [contractAddress] [method] [args] [isHex]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
# balanceOf
Call the balanceOf function to get the token balance of the specified account.
**HTTP API : ** 
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**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage : **TriggerConstantContract [ownerAddress] [contractAddress] [method] [args] [isHex]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
# transfer
Call transfer function for token transfer
**HTTP API : ** 
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Note: After calling this HTTP API, you also need to call the signature and broadcast APIs.
**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage ：**
TriggerContract [ownerAddress] [contractAddress] [method] [args] [isHex] [fee_limit] [value] [token_value] [token_id]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
fee_limit: the maximum trx consumption of this calling, the unit is sun
value: the amount of TRX   that transfered  to the contract while calling the contract, the unit is sun
token_value: the amount of TRC10 asset  that transfered  to the contract while calling the contract
token_id:the TRC10 asset ID that transfered  to the contract while calling the contract
Transaction confirmation：
Check whether the transfer of TRC20 was successful according to result of getTransactionInfoById.
# approve
Call the approve function to authorize token use rights to other addresses
**HTTP API : ** 
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Note: After calling this HTTP API, you also need to call the signature and broadcast APIs.
**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage ：**
TriggerContract [ownerAddress] [contractAddress] [method] [args] [isHex] [fee_limit] [value] [token_value] [token_id]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
fee_limit: the maximum trx consumption of this calling, the unit is sun
value: the amount of TRX   that transfered  to the contract while calling the contract, the unit is sun
token_value: the amount of TRC10 asset  that transfered  to the contract while calling the contract
token_id:the TRC10 asset ID that transfered  to the contract while calling the contract
Transaction confirmation：
Check whether the transfer of TRC20 was successful according to result of getTransactionInfoById.
# transferFrom
Calling the transferFrom function to transfer tokens from other people's accounts， needs to be used in conjunction with the approve method.
**HTTP API : ** 
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Note: After calling this HTTP API, you also need to call the signature and broadcast APIs.
**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage ：**
TriggerContract [ownerAddress] [contractAddress] [method] [args] [isHex] [fee_limit] [value] [token_value] [token_id]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format
fee_limit: the maximum trx consumption of this calling, the unit is sun
value: the amount of TRX   that transfered  to the contract while calling the contract, the unit is sun
token_value: the amount of TRC10 asset  that transfered  to the contract while calling the contract
token_id:the TRC10 asset ID that transfered  to the contract while calling the contract
Transaction confirmation：
Check whether the transfer of TRC20 was successful according to result of getTransactionInfoById.
# allowance
Call the allowance function to query the token balance of the query account available for third-party transfers.
**HTTP API : ** 
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**Tronweb Example:**
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**Wallet-cli Example:**
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**Usage : **TriggerConstantContract [ownerAddress] [contractAddress] [method] [args] [isHex]
**Parameter Description：**
ownerAddress: calller address
contractAdress：TRC20 contract address
method： contract function
args：function parameters，If there is no parameter,use # placeholder
isHex： whether the address of the command parameter is in hex format