# account_whitelist_operation¶

This operation is used to whitelist and blacklist accounts, primarily for transacting in whitelisted assets

Accounts can freely specify opinions about other accounts, in the form of either whitelisting or blacklisting them. This information is used in chain validation only to determine whether an account is authorized to transact in an asset type which enforces a whitelist, but third parties can use this information for other uses as well, as long as it does not conflict with the use of whitelisted assets.

An asset which enforces a whitelist specifies a list of accounts to maintain its whitelist, and a list of accounts to maintain its blacklist. In order for a given account A to hold and transact in a whitelisted asset S, A must be whitelisted by at least one of S's whitelist_authorities and blacklisted by none of S's blacklist_authorities. If A receives a balance of S, and is later removed from the whitelist(s) which allowed it to hold S, or added to any blacklist S specifies as authoritative, A's balance of S will be frozen until A's authorization is reinstated.

This operation requires authorizing_account's signature, but not account_to_list's. The fee is paid by authorizing_account.

struct account_whitelist_operation : public base_operation
{
struct fee_parameters_type { share_type fee = 300000; };
enum account_listing {
white_listed = 0x1, ///< This account is whitelisted, but not blacklisted
black_listed = 0x2, ///< This account is blacklisted, but not whitelisted
white_and_black_listed = white_listed | black_listed ///< This account is both whitelisted and blacklisted
};

/// Paid by authorizing_account
asset           fee;
/// The account which is specifying an opinion of another account
account_id_type authorizing_account;
/// The account being opined about
account_id_type account_to_list;
/// The new white and blacklist status of account_to_list, as determined by authorizing_account
/// This is a bitfield using values defined in the account_listing enum
uint8_t new_listing = no_listing;
extensions_type extensions;
};


asset

### JSON Example¶

[
7,{
"fee": {
"amount": 0,
"asset_id": "1.3.0"
},
"authorizing_account": "1.2.0",
"account_to_list": "1.2.0",
"new_listing": 0,
"extensions": []
}
]