wallet/delegateresource

Delegate staked bandwidth or energy resources to another TRON account.

Endpoint

POST /wallet/delegateresource

Parameters

Required Parameters

Parameter	Type	Description
owner_address	string	Account address delegating resources (base58)
receiver_address	string	Account receiving delegated resources (base58)
balance	number	Amount to delegate in SUN (1 TRX = 1,000,000 SUN)
resource	string	Resource type: "BANDWIDTH" or "ENERGY"

Optional Parameters

Parameter	Type	Description
lock	boolean	Lock delegation for 3 days (default: false)
lock_period	number	Custom lock period in seconds (if lock=true)
permission_id	number	Permission ID for multi-signature (default: 0)
visible	boolean	Return base58 addresses (default: false returns hex)

Response

Returns unsigned transaction containing the delegation operation. Transaction must be signed and broadcast.

Response Fields

• txID - Transaction hash
• raw_data - Transaction raw data
  • contract - Delegation contract details
  • expiration - Transaction expiration timestamp
  • timestamp - Transaction creation timestamp
• visible - Address format indicator

Important Notes

Delegation Rules

1. Must Stake First: Resources must be staked before delegation
2. Immediate Effect: Delegation takes effect immediately after transaction confirmation
3. Lock Period: Optional 3-day lock prevents immediate reclaim
4. Resource Ownership: Delegated resources remain owned by delegator
5. Reclaim Process: Use undelegateresource to reclaim delegated resources

Resource Calculations

• Energy delegation helps with smart contract execution
• Bandwidth delegation helps with transactions and transfers
• Receiver pays no TRX but can use delegated resources

Implementation Examples

JavaScript

class TronDelegationManager {
  constructor(apiKey) {
    this.apiKey = apiKey;
    this.baseUrl = `https://api-tron-mainnet.n.dwellir.com/${apiKey}`;
  }

  // Create delegation transaction
  async delegateResources(ownerAddress, receiverAddress, amountTRX, resourceType, lock = false) {
    const response = await fetch(`${this.baseUrl}/wallet/delegateresource`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        owner_address: ownerAddress,
        receiver_address: receiverAddress,
        balance: amountTRX * 1000000, // Convert TRX to SUN
        resource: resourceType,
        lock: lock,
        lock_period: lock ? 3 * 24 * 3600 : undefined, // 3 days in seconds
        visible: true
      })
    });

    if (!response.ok) {
      throw new Error(`Delegation failed: ${response.statusText}`);
    }

    return response.json();
  }

  // Check delegated resources for an account
  async getDelegatedResources(address) {
    const response = await fetch(`${this.baseUrl}/wallet/getdelegatedresourceaccountindex`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        value: address,
        visible: true
      })
    });

    const data = await response.json();
    
    // Get detailed info for each delegation
    const delegations = [];
    
    if (data.toAccounts) {
      for (const account of data.toAccounts) {
        const detail = await this.getDelegationDetail(address, account);
        delegations.push(detail);
      }
    }
    
    return delegations;
  }

  // Get detailed delegation info between two accounts
  async getDelegationDetail(from, to) {
    const response = await fetch(`${this.baseUrl}/wallet/getdelegatedresource`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        fromAddress: from,
        toAddress: to,
        visible: true
      })
    });

    return response.json();
  }

  // Calculate optimal delegation based on receiver's needs
  async calculateOptimalDelegation(receiverAddress, contractAddress = null) {
    // Get receiver's current resources
    const resourceResponse = await fetch(`${this.baseUrl}/wallet/getaccountresource`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        address: receiverAddress,
        visible: true
      })
    });

    const resources = await resourceResponse.json();
    
    // Estimate energy needs if contract address provided
    let energyNeeded = 0;
    if (contractAddress) {
      const contractResponse = await fetch(`${this.baseUrl}/wallet/triggerconstantcontract`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          owner_address: receiverAddress,
          contract_address: contractAddress,
          function_selector: 'estimateEnergy()',
          visible: true
        })
      });
      
      const contractData = await contractResponse.json();
      energyNeeded = contractData.energy_used || 50000; // Default 50k energy
    }
    
    // Calculate delegation amounts
    const currentEnergy = resources.EnergyLimit || 0;
    const currentBandwidth = resources.NetLimit || 0;
    const freeNetUsed = resources.freeNetUsed || 0;
    
    return {
      energy: {
        current: currentEnergy,
        needed: energyNeeded,
        delegate: Math.max(0, energyNeeded - currentEnergy),
        delegateTRX: Math.ceil((energyNeeded - currentEnergy) / 28.5) // Approximate ratio
      },
      bandwidth: {
        current: currentBandwidth,
        dailyUsage: freeNetUsed,
        delegate: Math.max(0, 5000 - currentBandwidth), // Aim for 5000 bandwidth
        delegateTRX: Math.max(0, 5000 - currentBandwidth) // 1 TRX = 1 bandwidth
      }
    };
  }

  // Batch delegate to multiple receivers
  async batchDelegate(ownerAddress, delegations) {
    const transactions = [];
    
    for (const delegation of delegations) {
      const tx = await this.delegateResources(
        ownerAddress,
        delegation.receiver,
        delegation.amount,
        delegation.resource,
        delegation.lock || false
      );
      
      transactions.push({
        receiver: delegation.receiver,
        resource: delegation.resource,
        amount: delegation.amount,
        txID: tx.txID,
        transaction: tx
      });
    }
    
    return transactions;
  }
}

// Advanced delegation strategies
class DelegationStrategy {
  constructor(manager) {
    this.manager = manager;
  }

  // Delegate to DApp users based on usage patterns
  async delegateForDApp(ownerAddress, dappUsers) {
    const delegations = [];
    
    for (const user of dappUsers) {
      // Calculate needs based on historical usage
      const optimal = await this.manager.calculateOptimalDelegation(
        user.address,
        user.primaryContract
      );
      
      if (optimal.energy.delegate > 0) {
        delegations.push({
          receiver: user.address,
          resource: 'ENERGY',
          amount: optimal.energy.delegateTRX,
          lock: true // Lock for stability
        });
      }
      
      if (optimal.bandwidth.delegate > 0) {
        delegations.push({
          receiver: user.address,
          resource: 'BANDWIDTH',
          amount: optimal.bandwidth.delegateTRX,
          lock: false // Flexible bandwidth
        });
      }
    }
    
    return this.manager.batchDelegate(ownerAddress, delegations);
  }

  // Dynamic delegation based on real-time needs
  async dynamicDelegation(ownerAddress, receiverAddress, threshold = 0.8) {
    const interval = setInterval(async () => {
      try {
        // Check receiver's resource usage
        const resourceResponse = await fetch(
          `${this.manager.baseUrl}/wallet/getaccountresource`,
          {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
              address: receiverAddress,
              visible: true
            })
          }
        );
        
        const resources = await resourceResponse.json();
        
        // Check energy usage
        const energyUsage = resources.EnergyUsed / resources.EnergyLimit;
        if (energyUsage > threshold) {
          console.log(`High energy usage detected: ${(energyUsage * 100).toFixed(1)}%`);
          
          // Delegate additional energy
          const additionalEnergy = Math.ceil(resources.EnergyLimit * 0.5);
          const tx = await this.manager.delegateResources(
            ownerAddress,
            receiverAddress,
            additionalEnergy / 28.5, // Convert to TRX
            'ENERGY',
            false
          );
          
          console.log(`Delegated additional energy: TX ${tx.txID}`);
        }
        
        // Check bandwidth usage
        const netUsage = resources.NetUsed / resources.NetLimit;
        if (netUsage > threshold) {
          console.log(`High bandwidth usage detected: ${(netUsage * 100).toFixed(1)}%`);
          
          // Delegate additional bandwidth
          const additionalBandwidth = Math.ceil(resources.NetLimit * 0.5);
          const tx = await this.manager.delegateResources(
            ownerAddress,
            receiverAddress,
            additionalBandwidth,
            'BANDWIDTH',
            false
          );
          
          console.log(`Delegated additional bandwidth: TX ${tx.txID}`);
        }
        
      } catch (error) {
        console.error('Dynamic delegation error:', error);
      }
    }, 60000); // Check every minute
    
    return interval;
  }
}

// Example usage
async function manageDelegation() {
  const manager = new TronDelegationManager('YOUR_API_KEY');
  const strategy = new DelegationStrategy(manager);
  
  try {
    // Simple delegation
    const simpleTx = await manager.delegateResources(
      'TOwnerAddress...',
      'TReceiverAddress...',
      1000, // 1000 TRX
      'ENERGY',
      true // Lock for 3 days
    );
    console.log('Simple delegation TX:', simpleTx.txID);
    
    // Calculate optimal delegation
    const optimal = await manager.calculateOptimalDelegation(
      'TReceiverAddress...',
      'TContractAddress...'
    );
    console.log('Optimal delegation:', optimal);
    
    // Batch delegation to multiple users
    const dappUsers = [
      { address: 'TUser1...', primaryContract: 'TContract1...' },
      { address: 'TUser2...', primaryContract: 'TContract2...' }
    ];
    
    const batchTxs = await strategy.delegateForDApp('TOwnerAddress...', dappUsers);
    console.log('Batch delegations:', batchTxs);
    
    // Start dynamic delegation monitoring
    const monitor = await strategy.dynamicDelegation(
      'TOwnerAddress...',
      'TReceiverAddress...',
      0.75 // Trigger at 75% usage
    );
    
    console.log('Dynamic delegation monitor started');
    
  } catch (error) {
    console.error('Delegation error:', error);
  }
}

Python

import requests
import json
import time
from typing import Dict, List, Optional, Tuple
from dataclasses import dataclass

@dataclass
class DelegationConfig:
    receiver: str
    amount_trx: float
    resource: str
    lock: bool = False
    lock_period: Optional[int] = None

class TronDelegationManager:
    def __init__(self, api_key: str):
        self.api_key = api_key
        self.base_url = f"https://api-tron-mainnet.n.dwellir.com/{api_key}"
    
    def delegate_resources(
        self,
        owner_address: str,
        receiver_address: str,
        amount_trx: float,
        resource: str,
        lock: bool = False,
        lock_period: Optional[int] = None
    ) -> Dict:
        """Create a resource delegation transaction"""
        
        payload = {
            "owner_address": owner_address,
            "receiver_address": receiver_address,
            "balance": int(amount_trx * 1_000_000),  # Convert to SUN
            "resource": resource,
            "lock": lock,
            "visible": True
        }
        
        if lock and lock_period:
            payload["lock_period"] = lock_period
        elif lock:
            payload["lock_period"] = 3 * 24 * 3600  # Default 3 days
        
        response = requests.post(
            f"{self.base_url}/wallet/delegateresource",
            json=payload
        )
        response.raise_for_status()
        return response.json()
    
    def get_delegation_index(self, address: str) -> Dict:
        """Get delegation index for an account"""
        
        response = requests.post(
            f"{self.base_url}/wallet/getdelegatedresourceaccountindex",
            json={
                "value": address,
                "visible": True
            }
        )
        response.raise_for_status()
        return response.json()
    
    def get_delegation_detail(
        self,
        from_address: str,
        to_address: str
    ) -> Dict:
        """Get detailed delegation between two accounts"""
        
        response = requests.post(
            f"{self.base_url}/wallet/getdelegatedresource",
            json={
                "fromAddress": from_address,
                "toAddress": to_address,
                "visible": True
            }
        )
        response.raise_for_status()
        return response.json()
    
    def analyze_delegation_needs(
        self,
        receiver_address: str,
        days: int = 1
    ) -> Dict:
        """Analyze resource needs for optimal delegation"""
        
        # Get account resource info
        response = requests.post(
            f"{self.base_url}/wallet/getaccountresource",
            json={
                "address": receiver_address,
                "visible": True
            }
        )
        response.raise_for_status()
        
        resources = response.json()
        
        # Calculate daily needs
        energy_limit = resources.get('EnergyLimit', 0)
        energy_used = resources.get('EnergyUsed', 0)
        net_limit = resources.get('NetLimit', 0)
        net_used = resources.get('NetUsed', 0)
        
        # Estimate required delegation
        energy_deficit = max(0, energy_used * days - energy_limit)
        bandwidth_deficit = max(0, net_used * days - net_limit)
        
        return {
            'energy': {
                'current_limit': energy_limit,
                'daily_usage': energy_used,
                'deficit': energy_deficit,
                'recommended_delegation_trx': energy_deficit / 28.5 if energy_deficit > 0 else 0
            },
            'bandwidth': {
                'current_limit': net_limit,
                'daily_usage': net_used,
                'deficit': bandwidth_deficit,
                'recommended_delegation_trx': bandwidth_deficit if bandwidth_deficit > 0 else 0
            }
        }
    
    def batch_delegate(
        self,
        owner_address: str,
        delegations: List[DelegationConfig]
    ) -> List[Dict]:
        """Execute multiple delegations"""
        
        results = []
        
        for config in delegations:
            try:
                tx = self.delegate_resources(
                    owner_address,
                    config.receiver,
                    config.amount_trx,
                    config.resource,
                    config.lock,
                    config.lock_period
                )
                
                results.append({
                    'success': True,
                    'receiver': config.receiver,
                    'resource': config.resource,
                    'amount_trx': config.amount_trx,
                    'txID': tx['txID'],
                    'transaction': tx
                })
            except Exception as e:
                results.append({
                    'success': False,
                    'receiver': config.receiver,
                    'resource': config.resource,
                    'error': str(e)
                })
        
        return results

class SmartDelegationStrategy:
    """Advanced delegation strategies for different use cases"""
    
    def __init__(self, manager: TronDelegationManager):
        self.manager = manager
    
    def delegate_for_gaming(
        self,
        owner_address: str,
        player_addresses: List[str]
    ) -> List[Dict]:
        """Optimized delegation for gaming DApps"""
        
        delegations = []
        
        for player in player_addresses:
            # Gaming typically needs more energy for contracts
            delegations.append(DelegationConfig(
                receiver=player,
                amount_trx=5000,  # ~142,500 energy
                resource='ENERGY',
                lock=True  # Lock for stable gameplay
            ))
            
            # Moderate bandwidth for transactions
            delegations.append(DelegationConfig(
                receiver=player,
                amount_trx=1000,  # 1000 bandwidth
                resource='BANDWIDTH',
                lock=False
            ))
        
        return self.manager.batch_delegate(owner_address, delegations)
    
    def delegate_for_defi(
        self,
        owner_address: str,
        trader_addresses: List[str]
    ) -> List[Dict]:
        """Optimized delegation for DeFi trading"""
        
        delegations = []
        
        for trader in trader_addresses:
            # DeFi needs high energy for swaps/liquidity
            delegations.append(DelegationConfig(
                receiver=trader,
                amount_trx=10000,  # ~285,000 energy
                resource='ENERGY',
                lock=False  # Flexible for trading
            ))
            
            # High bandwidth for frequent transactions
            delegations.append(DelegationConfig(
                receiver=trader,
                amount_trx=2000,  # 2000 bandwidth
                resource='BANDWIDTH',
                lock=False
            ))
        
        return self.manager.batch_delegate(owner_address, delegations)
    
    def progressive_delegation(
        self,
        owner_address: str,
        receiver_address: str,
        initial_amount: float,
        increment: float,
        max_amount: float
    ) -> None:
        """Progressive delegation based on usage"""
        
        current_delegation = initial_amount
        
        while current_delegation <= max_amount:
            # Check current usage
            analysis = self.manager.analyze_delegation_needs(receiver_address)
            
            # Delegate if needed
            if analysis['energy']['deficit'] > 0:
                tx = self.manager.delegate_resources(
                    owner_address,
                    receiver_address,
                    current_delegation,
                    'ENERGY',
                    lock=False
                )
                print(f"Delegated {current_delegation} TRX for energy: {tx['txID']}")
                
                # Increase for next iteration
                current_delegation += increment
                
                # Wait before checking again
                time.sleep(3600)  # 1 hour
            else:
                print("No additional delegation needed")
                time.sleep(3600)

# Example usage
def main():
    manager = TronDelegationManager('YOUR_API_KEY')
    strategy = SmartDelegationStrategy(manager)
    
    # 1. Simple delegation
    print("=== Simple Delegation ===")
    simple_tx = manager.delegate_resources(
        'TOwnerAddress...',
        'TReceiverAddress...',
        1000,  # 1000 TRX
        'ENERGY',
        lock=True
    )
    print(f"Transaction ID: {simple_tx['txID']}")
    
    # 2. Analyze delegation needs
    print("\n=== Delegation Analysis ===")
    analysis = manager.analyze_delegation_needs('TReceiverAddress...', days=7)
    print(f"Energy needs: {analysis['energy']['recommended_delegation_trx']:.2f} TRX")
    print(f"Bandwidth needs: {analysis['bandwidth']['recommended_delegation_trx']:.2f} TRX")
    
    # 3. Batch delegation for gaming
    print("\n=== Gaming Delegation ===")
    gaming_results = strategy.delegate_for_gaming(
        'TOwnerAddress...',
        ['TPlayer1...', 'TPlayer2...', 'TPlayer3...']
    )
    
    for result in gaming_results:
        if result['success']:
            print(f"✓ {result['receiver']}: {result['resource']} - TX: {result['txID'][:8]}...")
        else:
            print(f"✗ {result['receiver']}: {result['error']}")
    
    # 4. Check existing delegations
    print("\n=== Existing Delegations ===")
    index = manager.get_delegation_index('TOwnerAddress...')
    
    if index.get('toAccounts'):
        for account in index['toAccounts']:
            detail = manager.get_delegation_detail('TOwnerAddress...', account)
            print(f"To {account}:")
            for delegation in detail.get('delegatedResource', []):
                print(f"  - {delegation['frozen_balance_for_energy']/1_000_000:.2f} TRX for ENERGY")
                print(f"  - {delegation['frozen_balance_for_bandwidth']/1_000_000:.2f} TRX for BANDWIDTH")

if __name__ == "__main__":
    main()

cURL

# Basic energy delegation
curl -X POST https://api-tron-mainnet.n.dwellir.com/YOUR_API_KEY/wallet/delegateresource \
  -H "Content-Type: application/json" \
  -d '{
    "owner_address": "TOwnerAddress...",
    "receiver_address": "TReceiverAddress...",
    "balance": 1000000000,
    "resource": "ENERGY",
    "visible": true
  }'

# Delegate bandwidth with 3-day lock
curl -X POST https://api-tron-mainnet.n.dwellir.com/YOUR_API_KEY/wallet/delegateresource \
  -H "Content-Type: application/json" \
  -d '{
    "owner_address": "TOwnerAddress...",
    "receiver_address": "TReceiverAddress...",
    "balance": 500000000,
    "resource": "BANDWIDTH",
    "lock": true,
    "lock_period": 259200,
    "visible": true
  }'

# Check delegation index
curl -X POST https://api-tron-mainnet.n.dwellir.com/YOUR_API_KEY/wallet/getdelegatedresourceaccountindex \
  -H "Content-Type: application/json" \
  -d '{
    "value": "TOwnerAddress...",
    "visible": true
  }'

# Get delegation details between accounts
curl -X POST https://api-tron-mainnet.n.dwellir.com/YOUR_API_KEY/wallet/getdelegatedresource \
  -H "Content-Type: application/json" \
  -d '{
    "fromAddress": "TOwnerAddress...",
    "toAddress": "TReceiverAddress...",
    "visible": true
  }'

Example Response

{
  "visible": true,
  "txID": "d8f3c4b9e2a7d6c5e4f3b2a1d9c8e7f6b5a4d3c2e1f9a8b7c6d5e4f3a2b1c9e",
  "raw_data": {
    "contract": [
      {
        "parameter": {
          "value": {
            "owner_address": "TOwnerAddress...",
            "receiver_address": "TReceiverAddress...",
            "balance": 1000000000,
            "resource": "ENERGY",
            "lock": true,
            "lock_period": 259200
          },
          "type_url": "type.googleapis.com/protocol.DelegateResourceContract"
        },
        "type": "DelegateResourceContract"
      }
    ],
    "ref_block_bytes": "6b5c",
    "ref_block_hash": "4d3e5f9a8b7c6d5e",
    "expiration": 1702456849000,
    "timestamp": 1702456789000
  }
}

Delegation Flow

graph LR
    A[Owner Stakes TRX] --> B[Resources Available]
    B --> C[Delegate to Receiver]
    C --> D[Receiver Uses Resources]
    D --> E[Resources Consumed]
    E --> F[Owner Can Reclaim]
    
    style A fill:#4CAF50
    style C fill:#2196F3
    style D fill:#FF9800

Best Practices

1. Calculate Before Delegating

// Always analyze needs first
const needs = await analyzeNeeds(receiverAddress);
const delegateAmount = Math.ceil(needs.energy.deficit / 28.5);

2. Use Locks Strategically

• Lock for stable, long-term delegations
• Keep unlocked for flexible, short-term needs
• Consider 3-day default lock period

3. Monitor Resource Usage

• Track receiver's consumption patterns
• Adjust delegations based on actual usage
• Implement alerts for high usage

4. Batch Operations

• Group multiple delegations together
• Reduces transaction overhead
• Easier management and tracking

Common Errors

Error	Description	Solution
Insufficient staked balance	Not enough staked resources	Stake more TRX first
Invalid resource type	Must be BANDWIDTH or ENERGY	Use correct resource string
Receiver address invalid	Malformed receiver address	Verify base58 format
Already delegated	Resources already delegated to receiver	Check existing delegations

Use Cases

• DApp Support: Provide resources for users to interact with your DApp
• Gaming: Enable free gameplay by covering resource costs
• DeFi Trading: Support traders with energy for smart contract calls
• Onboarding: Help new users get started without staking
• Resource Rental: Commercial resource delegation services

Related Methods

• wallet/undelegateresource - Reclaim delegated resources
• wallet/freezebalancev2 - Stake TRX for resources
• wallet/getaccountresource - View resource limits