Solana: How are account details shared between main program and transfer hook?
Sharing Account Data Between the Main Program and Solana Transfer Hook
Solana is a fast and scalable blockchain platform that allows developers to build decentralized applications (dApps) efficiently. When building dApps, it is common to need to share account data between different components, such as the main program, transfer hook, and other contracts. In this article, we will explore how to share account data between the main program and Solana transfer hook.
Problem:
Suppose you have two programs, “program#A” and “program#B”, where “program#A” is the main program and “program#B” is the transfer hook. Both programs need to access a shared account data object, but they are not connected by a direct link.
Solution:
You can share account data between the main program and Solana transfer hook as follows:
- Create an Account Data Object: First, create an Account Data Object (ADO) in your main program contract. This ADO represents the shared account information that both programs use.
// Create an ADO for the shared account information
const SharedAccount = await SolanaConfigAccount.create(
{ id: "shared_account", key: "shared_account_key" },
"Shared Account Information"
);
- Use the migration hook: Next, create a migration hook contract that is responsible for updating and using the shared ADO.
// Create a transfer hook contract
const TransferHook = await SolanaConfigAccount.create(
{ id: "transfer_hook", key: "transfer_hook_key" },
{
update: async (account, { key }) => {
const data = SharedAccount.get(key);
// Update the shared account data object
await SharedAccount.update(data);
}
}
);
- Connect the transfer hook to the main program
: Now connect the transfer hook contract to your main program by updating its “update” method.
// Connect the transfer hook to the main program
TransferHook.connect();
- Get shared account data from the transfer hook: Finally, use the transfer hook’s update method to get the shared account data object and use it as needed.
// Get shared account data from the transfer hook
const sharedAccount = await SharedAccount.get();
// Use shared account data
shareAccount.getData(); // return updated data
Example use case:
Let’s say you have a simple program “program#A” that wants to update and use shared account data. Here’s an example of how you can do it:
// Program #A
const Account = {
name: "Account",
id: "account_id",
key: "key",
};
const ADO = await SolanaConfigAccount.create(
{ id: "shared_account", key: "shared_account_key" },
"Shared Account Data"
);
// Update shared account data
await SharedAccount.update(ADO, {
id: "updated_id",
key: "updated_key",
value: "new_value",
});
// Get updated shared account data
const updatedSharedAccount = await SharedAccount.get();
// Use updated shared account data
updatedSharedAccount.getData(); // return new data
To sum up, sharing account data between the main application and Solana’s transfer hook is a straightforward process that involves creating an ADO in the main application contract, using the transfer hook to update and consume the shared ADO, and connecting the transfer hook to the main network. program. This allows you to build dApps with minimal code changes and efficient use of resources.