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Harsh Aatpadkar
Harsh Aatpadkar

Reputation: 69

Identification of purchased product

I have created coins on test network.Now the confusion is,

I have distributed coins to 100 members,who can use those coins to buy digital products(domains) on my platform.Now the confusion is if all domains are listed for sale for $10(100 coins),and multiple domains got sold,how can I identify which user made payment to me.Because all users can see my wallet address.Is there any way to detect that payment came in for which purchased product?

Upvotes: 0

Views: 53

Answers (2)

Mouazzam
Mouazzam

Reputation: 479

You can pass the identifier of a particular product as the input data of the transaction. In this case it will be easy to identify the product against which the payment was made.

web3.eth.sendTransaction web3.eth.sendTransaction(transactionObject [, callback])

Sends a transaction to the network.

Parameters 1. Object - The transaction object to send: • from: String - The address for the sending account. Uses the web3.eth.defaultAccount property, if not specified. • to: String - (optional) The destination address of the message, left undefined for a contract-creation transaction. • value: Number|String|BigNumber - (optional) The value transferred for the transaction in Wei, also the endowment if it's a contract-creation transaction. • gas: Number|String|BigNumber - (optional, default: To-Be-Determined) The amount of gas to use for the transaction (unused gas is refunded). • gasPrice: Number|String|BigNumber - (optional, default: To-Be-Determined) The price of gas for this transaction in wei, defaults to the mean network gas price. • data: String - (optional) Either a byte string containing the associated data of the message, or in the case of a contract-creation transaction, the initialisation code. • nonce: Number - (optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce. 2. Function - (optional) If you pass a callback the HTTP request is made asynchronous. See this note for details.

Returns

String - The 32 Bytes transaction hash as HEX string.

Upvotes: 1

Richard Garfield
Richard Garfield

Reputation: 455

Make your wallet into a smart contract.

Then checkout the fallback function payable. That function gets called anytime someone sends ether to your contract. 

function () payable {
    address guyWhoPaiedMe = msg.sender;
  }

To figure out who sent you the ether use msg.sender.

Upvotes: 1

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