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Portal’s Web SDK provides token delegation capabilities through the portal.delegations API. This enables approving token spending, revoking approvals, checking delegation status, and transferring tokens as a delegate on both EVM and Solana chains.

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Overview

The delegations functionality allows you to:
  • Approve other addresses to spend tokens on behalf of your wallet
  • Revoke existing delegations to remove spending permissions
  • Check status of active delegations and balances
  • Transfer tokens as a delegate from another address

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Prerequisites

Before using delegation operations, ensure you have:

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Approving Delegations

Use approve to grant another address permission to spend tokens on your behalf. This method works for both EVM and Solana chains. EVM Approval 
async function approveEVMDelegation(portal: Portal) {
  const tx = await portal.delegations.approve({
    chain: 'eip155:11155111', // Sepolia testnet
    token: 'USDC',
    delegateAddress: '0xb52a818536341003c9d923103abd3659c27e5a2b',
    amount: '10',
  })

  console.log('Approve response:', tx)
  
  // Sign and send the transaction
  const hash = await portal.request({
    chainId: 'eip155:11155111',
    method: 'eth_sendTransaction',
    params: [tx.transactions[0]]
  })
  
  console.log('Transaction hash:', hash)
  return hash
}
Solana Approval 
async function approveSolanaDelegation(portal: Portal) {
  const tx = await portal.delegations.approve({
    chain: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1', // Solana Devnet
    token: 'USDC',
    delegateAddress: '7EYg9HUZBoCeCfWbcj3EFNX5Ecgjn9FTY2UhnRny5NYv',
    amount: '10',
  })

  console.log('Approve response:', tx)
  
  // Sign and send the transaction
  const hash = await portal.request({
    chainId: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
    method: 'sol_signAndSendTransaction',
    params: [tx.encodedTransactions[0]]
  })
  
  console.log('Transaction hash:', hash)
  return hash
}

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Checking Delegation Status

Use getStatus to check current delegations and token balances for a specific delegate address. EVM Status Check 
async function getEVMDelegationStatus(portal: Portal) {
  const status = await portal.delegations.getStatus({
    chain: 'eip155:11155111',
    token: 'USDC',
    delegateAddress: '0xb52a818536341003c9d923103abd3659c27e5a2b',
  })

  console.log('Delegation status:', status)
  console.log('Balance:', status.balance)
  console.log('Delegations:', status.delegations)
}
Solana Status Check 
async function getSolanaDelegationStatus(portal: Portal) {
  const status = await portal.delegations.getStatus({
    chain: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
    token: 'USDC',
    delegateAddress: '7EYg9HUZBoCeCfWbcj3EFNX5Ecgjn9FTY2UhnRny5NYv',
  })

  console.log('Delegation status:', status)
}

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Revoking Delegations

Use revoke to remove spending permissions from a delegate address. EVM Revoke 
async function revokeEVMDelegation(portal: Portal) {
  const tx = await portal.delegations.revoke({
    chain: 'eip155:11155111',
    token: 'USDC',
    delegateAddress: '0xb52a818536341003c9d923103abd3659c27e5a2b',
  })

  console.log('Revoke response:', tx)
  
  const hash = await portal.request({
    chainId: 'eip155:11155111',
    method: 'eth_sendTransaction',
    params: [tx.transactions[0]]
  })
  
  console.log('Transaction hash:', hash)
  return hash
}
Solana Revoke 
async function revokeSolanaDelegation(portal: Portal) {
  const tx = await portal.delegations.revoke({
    chain: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
    token: 'USDC',
    delegateAddress: '7EYg9HUZBoCeCfWbcj3EFNX5Ecgjn9FTY2UhnRny5NYv',
  })

  console.log('Revoke response:', tx)
  
  const hash = await portal.request({
    chainId: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
    method: 'sol_signAndSendTransaction',
    params: [tx.encodedTransactions[0]]
  })
  
  console.log('Transaction hash:', hash)
  return hash
}
Always revoke unused delegations after completing operations to minimize security risks.

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Transferring as a Delegate

Use transferFrom to transfer tokens from another address that has delegated spending permission to you. EVM Transfer From 
async function transferFromEVM(portal: Portal) {
  const tx = await portal.delegations.transferFrom({
    chain: 'eip155:11155111',
    token: 'USDC',
    fromAddress: '0x03c66353df426e18e6e7866fa9e2e73ef6833500', // Token owner
    toAddress: '0xdFd8302f44727A6348F702fF7B594f127dE3A902', // Recipient
    amount: '0.0001',
  })

  console.log('TransferFrom response:', tx)
  
  const hash = await portal.request({
    chainId: 'eip155:11155111',
    method: 'eth_sendTransaction',
    params: [tx.transactions[0]]
  })
  
  console.log('Transaction hash:', hash)
  return hash
}
Solana Transfer From 
async function transferFromSolana(portal: Portal) {
  const tx = await portal.delegations.transferFrom({
    chain: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
    token: 'USDC',
    fromAddress: 'GoFBWzCVxSEGYxgSAmdm2itS3EUbYmLpgzEcQ4J3WnsN', // Token owner
    toAddress: 'GPsPXxoQA51aTJJkNHtFDFYui5hN5UxcFPnheJEHa5Du', // Recipient
    amount: '0.0001',
  })

  console.log('TransferFrom response:', tx)
  
  const hash = await portal.request({
    chainId: 'solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1',
    method: 'sol_signAndSendTransaction',
    params: [tx.encodedTransactions[0]]
  })
  
  console.log('Transaction hash:', hash)
  return hash
}
Delegation Roles: fromAddress is the token owner who approved the delegation. Your wallet (the delegate) signs the transaction to transfer tokens from the owner to the toAddress recipient.

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Supported Networks

Delegations work on all Portal-supported EVM and Solana chains:
  • EVM: Ethereum, Polygon, Base, Arbitrum, Optimism, and all other EVM-compatible chains
  • Solana: Solana Mainnet and Devnet
For a complete list, see Blockchain Support.

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Next Steps