How to Access an Object's Metadata
In the Iroha 2 almost all basic objects like Account, Asset, Domain, etc. have a Metadata field, which is a struct containing a BTreeMap. By default the basic objects are created with 0 metadata capacity so if you get empty result, be sure that metadata has been added into the object.
The current example describes how to get metadata from an Account.
Precondition: The object has been created with a metadata.
rust
fn access_metadata(
iroha: &Client,
) {
//Define the target account and make a request to get this account's object
let account_id: AccountId = "alice@wonderland".parse().unwrap();
let account: Account = iroha.request(FindAccountById::new(account_id)).unwrap();
//Bind metadata struct to a variable
let account_metadata = account.metadata();
//Iterate for the metadata in the account's object
for metadata in account_metadata.iter() {
println!("{:?}", metadata)
}
}fn access_metadata(
iroha: &Client,
) {
//Define the target account and make a request to get this account's object
let account_id: AccountId = "alice@wonderland".parse().unwrap();
let account: Account = iroha.request(FindAccountById::new(account_id)).unwrap();
//Bind metadata struct to a variable
let account_metadata = account.metadata();
//Iterate for the metadata in the account's object
for metadata in account_metadata.iter() {
println!("{:?}", metadata)
}
}