Set Operator for Tokens

Setting an operator for tokens using the ERC20 API is a critical action that allows one user to approve another user (the operator) to spend tokens on their behalf. This can be useful in various scenarios, such as delegating token management to a third party or granting specific spending permissions. To achieve this, you can use the setOperator method provided by the edeXa ERC20 API.

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Prerequisites

• Authenticate the client using the edeXa SDK. For authentication details, see the authentication method.

• Ensure that users are enrolled and have valid usernames. You can enroll users using the enrollUser method.

• Mint tokens using the Mint Tokens method before attempting to transfer them.

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Sample Code Snippet

Here is a JavaScript code snippet demonstrating the use of the setOperator method:

// SDK.js
import { ERC20, Network } from 'edeXa-sdk';

async function setOperator() {
  const erc20 = new ERC20({
    ...settings,
    authorization: `Bearer ${token}`,
  });

  const settings = {
    network: Network.SANDBOX, // or Network.MAINNET for the mainnet network
  };

  const dataToSetOperator = {
    spender(required): 'Enter the username of the user to whom you want to set operator for tokens.',
    value(required): 'The amount of tokens to approve for spending.',
    chaincode(optional): 'The name of the smart contract or chaincode managing the tokens',
    channel(optional): 'The name of the channel in the blockchain network'
  }

  try {
    const setOperatorResponse = await erc20.setOperator(dataToSetOperator);
    // Handle success
  } catch (error) {
    // Handle error
  }
}

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Important Notes

• Authentication Token: Replace the token in the authorization header with your actual authentication token.
• Asynchronous Execution: The setOperator function is an async function, using await for the erc20.setOperator method's

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Request Parameters

The dataToSetOperator object contains the following parameters for the setOperator method:

Parameter	Required	Type	Description	Default
spender	Yes	String	Enter the username of the user to whom you want to set the operator for tokens.
value	Yes	Number	The amount of tokens to approve for spending by the operator.
chaincode	Optional	String	The name of the smart contract or chaincode managing the tokens. (Optional, use default if not provided)	Default chaincode
channel	Optional	String	The name of the channel in the blockchain network. (Optional, use default if not provided)	Default chaincode

• The spender represents the user for whom you are granting the operator role. This user will have permission to spend tokens on behalf of the account owner.
• The value specifies the number of tokens to approve for spending by the operator.
• Optional parameters chaincode and channel can be provided to specify the smart contract or chaincode managing the tokens and the blockchain network channel. If not provided, the default values will be used.

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Response Format

The response from the setOperator method includes the following attributes:

Key	Type	Description
to	String	The username of the user who is the spender.
allowanceAmount	Number	The approved allowance amount of tokens for spending by the operator.

In summary, the setOperator method is used to grant permission for one user to spend tokens on behalf of another user, allowing for flexible and controlled token management within the ERC20 API.