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use hiero_sdk_proto::services;
use crate::protobuf::{
FromProtobuf,
ToProtobuf,
};
use crate::{
AccountId,
TokenId,
};
/// A custom transfer fee that was assessed during the handling of a `CryptoTransfer`.
#[derive(Debug, Eq, PartialEq, Clone)]
pub struct AssessedCustomFee {
/// The amount of currency charged to each payer.
pub amount: i64,
/// The currency `amount` is charged in, if `None` the fee is in HBar.
pub token_id: Option<TokenId>,
/// The account that receives the fees that were charged.
pub fee_collector_account_id: Option<AccountId>,
/// A list of all accounts that were charged this fee.
pub payer_account_id_list: Vec<AccountId>,
}
impl AssessedCustomFee {
/// Create a new `AssessedCustomFee` from protobuf-encoded `bytes`.
///
/// # Errors
/// - [`Error::FromProtobuf`](crate::Error::FromProtobuf) if decoding the bytes fails to produce a valid protobuf.
/// - [`Error::FromProtobuf`](crate::Error::FromProtobuf) if decoding the protobuf fails.
pub fn from_bytes(bytes: &[u8]) -> crate::Result<Self> {
FromProtobuf::from_bytes(bytes)
}
/// Convert `self` to a protobuf-encoded [`Vec<u8>`].
#[must_use]
pub fn to_bytes(&self) -> Vec<u8> {
ToProtobuf::to_bytes(self)
}
}
impl FromProtobuf<services::AssessedCustomFee> for AssessedCustomFee {
fn from_protobuf(pb: services::AssessedCustomFee) -> crate::Result<Self>
where
Self: Sized,
{
Ok(Self {
amount: pb.amount,
token_id: Option::from_protobuf(pb.token_id)?,
fee_collector_account_id: Option::from_protobuf(pb.fee_collector_account_id)?,
payer_account_id_list: Vec::from_protobuf(pb.effective_payer_account_id)?,
})
}
}
impl ToProtobuf for AssessedCustomFee {
type Protobuf = services::AssessedCustomFee;
fn to_protobuf(&self) -> Self::Protobuf {
services::AssessedCustomFee {
amount: self.amount,
token_id: self.token_id.to_protobuf(),
fee_collector_account_id: self.fee_collector_account_id.to_protobuf(),
effective_payer_account_id: self.payer_account_id_list.to_protobuf(),
}
}
}
#[cfg(test)]
mod tests {
use expect_test::expect;
use hiero_sdk_proto::services;
use crate::protobuf::{
FromProtobuf,
ToProtobuf,
};
use crate::{
AccountId,
AssessedCustomFee,
TokenId,
};
const AMOUNT: i64 = 1;
const TOKEN_ID: TokenId = TokenId { shard: 2, realm: 3, num: 4, checksum: None };
const FEE_COLLECTOR: AccountId =
AccountId { shard: 5, realm: 6, num: 7, alias: None, evm_address: None, checksum: None };
const PAYER_ACCOUNT_IDS: [AccountId; 3] = [
AccountId { shard: 8, realm: 9, num: 10, alias: None, evm_address: None, checksum: None },
AccountId { shard: 11, realm: 12, num: 13, alias: None, evm_address: None, checksum: None },
AccountId { shard: 14, realm: 15, num: 16, alias: None, evm_address: None, checksum: None },
];
fn make_fee_proto() -> services::AssessedCustomFee {
services::AssessedCustomFee {
amount: AMOUNT,
token_id: Some(TOKEN_ID.to_protobuf()),
fee_collector_account_id: Some(FEE_COLLECTOR.to_protobuf()),
effective_payer_account_id: PAYER_ACCOUNT_IDS
.iter()
.map(AccountId::to_protobuf)
.collect(),
}
}
fn make_fee() -> AssessedCustomFee {
AssessedCustomFee {
amount: 201,
token_id: Some(TokenId::new(1, 2, 3)),
fee_collector_account_id: Some(AccountId {
shard: 4,
realm: 5,
num: 6,
alias: None,
evm_address: None,
checksum: None,
}),
payer_account_id_list: Vec::from([
AccountId {
shard: 0,
realm: 0,
num: 1,
alias: None,
evm_address: None,
checksum: None,
},
AccountId {
shard: 0,
realm: 0,
num: 2,
alias: None,
evm_address: None,
checksum: None,
},
AccountId {
shard: 0,
realm: 0,
num: 3,
alias: None,
evm_address: None,
checksum: None,
},
]),
}
}
#[test]
fn should_serialize() {
let original_assessed_custom_fee = make_fee();
let assessed_custom_fee_bytes = original_assessed_custom_fee.to_bytes();
let copy_assessed_custom_fee =
AssessedCustomFee::from_bytes(&assessed_custom_fee_bytes).unwrap();
assert_eq!(original_assessed_custom_fee, copy_assessed_custom_fee);
expect![[r#"
AssessedCustomFee {
amount: 201,
token_id: Some(
"1.2.3",
),
fee_collector_account_id: Some(
"4.5.6",
),
payer_account_id_list: [
"0.0.1",
"0.0.2",
"0.0.3",
],
}
"#]]
.assert_debug_eq(&original_assessed_custom_fee);
}
#[test]
fn from_protobuf() {
expect![[r#"
AssessedCustomFee {
amount: 1,
token_id: Some(
"2.3.4",
),
fee_collector_account_id: Some(
"5.6.7",
),
payer_account_id_list: [
"8.9.10",
"11.12.13",
"14.15.16",
],
}
"#]]
.assert_debug_eq(&AssessedCustomFee::from_protobuf(make_fee_proto()).unwrap());
}
#[test]
fn to_protobuf() {
expect![[r#"
AssessedCustomFee {
amount: 1,
token_id: Some(
TokenId {
shard_num: 2,
realm_num: 3,
token_num: 4,
},
),
fee_collector_account_id: Some(
AccountId {
shard_num: 5,
realm_num: 6,
account: Some(
AccountNum(
7,
),
),
},
),
effective_payer_account_id: [
AccountId {
shard_num: 8,
realm_num: 9,
account: Some(
AccountNum(
10,
),
),
},
AccountId {
shard_num: 11,
realm_num: 12,
account: Some(
AccountNum(
13,
),
),
},
AccountId {
shard_num: 14,
realm_num: 15,
account: Some(
AccountNum(
16,
),
),
},
],
}
"#]]
.assert_debug_eq(
&AssessedCustomFee::from_protobuf(make_fee_proto()).unwrap().to_protobuf(),
);
}
#[test]
fn should_bytes() {
let assessed_custom_fee = make_fee();
assert_eq!(
assessed_custom_fee,
AssessedCustomFee::from_bytes(&assessed_custom_fee.to_bytes()).unwrap()
);
}
}