177 lines
4 KiB
Go
177 lines
4 KiB
Go
package tron
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import (
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"fmt"
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"os"
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"sync"
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)
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const CONTRACT_ADDRESS string = "TRC20_USDT_CONTRACT_ADDRESS"
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const TRON_GRPC_NODE string = "TRON_GRPC_NODE"
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type TronNode struct {
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contractAddress string
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grpcNode string
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feeLimit int64
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}
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var tronNode *TronNode
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var once sync.Once
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func GetTRC20ContractAddress() string {
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return tronNode.contractAddress
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}
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func (t TronNode) Init() (*TronNode, error) {
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if tronNode != nil {
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return tronNode, nil
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}
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trc20Contract, isAddressPresent := os.LookupEnv(CONTRACT_ADDRESS)
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if !isAddressPresent {
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return nil, fmt.Errorf("missing environment variable: %s", CONTRACT_ADDRESS)
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}
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grpcNode, isGrpcNodePresent := os.LookupEnv(TRON_GRPC_NODE)
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if !isGrpcNodePresent {
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return nil, fmt.Errorf("missing environment variable: %s", TRON_GRPC_NODE)
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}
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if tronNode == nil {
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once.Do(func() {
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t.contractAddress = trc20Contract
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t.grpcNode = grpcNode
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t.feeLimit = 100000000
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tronNode = &t
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})
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}
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return tronNode, nil
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}
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const COMMON_ABI string = `
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[
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{
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"constant": true,
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"inputs": [],
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"name": "name",
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"outputs": [ { "name": "", "type": "string" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{ "name": "_spender", "type": "address" },
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{ "name": "_value", "type": "uint256" }
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],
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"name": "approve",
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"outputs": [ { "name": "", "type": "bool" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [],
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"name": "totalSupply",
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"outputs": [ { "name": "", "type": "uint256" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{ "name": "_from", "type": "address" },
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{ "name": "_to", "type": "address" },
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{ "name": "_value", "type": "uint256" }
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],
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"name": "transferFrom",
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"outputs": [ { "name": "", "type": "bool" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [],
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"name": "decimals",
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"outputs": [ { "name": "", "type": "uint8" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [ { "name": "_owner", "type": "address" } ],
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"name": "balanceOf",
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"outputs": [ { "name": "", "type": "uint256" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [],
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"name": "symbol",
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"outputs": [ { "name": "", "type": "string" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{ "name": "_to", "type": "address" },
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{ "name": "_value", "type": "uint256" }
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],
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"name": "transfer",
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"outputs": [ { "name": "", "type": "bool" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{ "name": "_token", "type": "address" },
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{ "name": "_from", "type": "address" },
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{ "name": "_to", "type": "address" },
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{ "name": "_value", "type": "uint256" },
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{ "name": "_camount", "type": "uint256" }
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],
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"name": "chargeTransfer",
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"outputs": [ { "name": "", "type": "bool" } ],
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"payable": false,
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [
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{ "name": "_owner", "type": "address" },
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{ "name": "_spender", "type": "address" }
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],
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"name": "allowance",
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"outputs": [ { "name": "", "type": "uint256" } ],
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"payable": false,
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"type": "function"
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},
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{ "inputs": [], "payable": false, "type": "constructor" },
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{
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"anonymous": false,
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"inputs": [
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{ "indexed": true, "name": "_from", "type": "address" },
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{ "indexed": true, "name": "_to", "type": "address" },
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{ "indexed": false, "name": "_value", "type": "uint256" }
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],
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"name": "Transfer",
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"type": "event"
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},
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{
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"anonymous": false,
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"inputs": [
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{ "indexed": true, "name": "_owner", "type": "address" },
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{ "indexed": true, "name": "_spender", "type": "address" },
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{ "indexed": false, "name": "_value", "type": "uint256" }
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],
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"name": "Approval",
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"type": "event"
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}
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]
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`
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