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use diem_crypto::{ed25519::Ed25519PrivateKey, HashValue, PrivateKey};
use diem_types::{
account_address::AccountAddress,
chain_id::ChainId,
transaction::{
authenticator::AuthenticationKeyPreimage, SignedTransaction, TransactionPayload,
},
};
use move_core_types::gas_schedule::{
AbstractMemorySize, GasAlgebra, GasCarrier, GasPrice, GasUnits,
};
use std::convert::TryFrom;
pub struct TransactionMetadata {
pub sender: AccountAddress,
pub authentication_key_preimage: Vec<u8>,
pub secondary_signers: Vec<AccountAddress>,
pub secondary_authentication_key_preimages: Vec<Vec<u8>>,
pub sequence_number: u64,
pub max_gas_amount: GasUnits<GasCarrier>,
pub gas_unit_price: GasPrice<GasCarrier>,
pub transaction_size: AbstractMemorySize<GasCarrier>,
pub expiration_timestamp_secs: u64,
pub chain_id: ChainId,
pub script_hash: Vec<u8>,
}
impl TransactionMetadata {
pub fn new(txn: &SignedTransaction) -> Self {
Self {
sender: txn.sender(),
authentication_key_preimage: txn
.authenticator()
.sender()
.authentication_key_preimage()
.into_vec(),
secondary_signers: txn.authenticator().secondary_signer_addreses(),
secondary_authentication_key_preimages: txn
.authenticator()
.secondary_signers()
.iter()
.map(|account_auth| account_auth.authentication_key_preimage().into_vec())
.collect(),
sequence_number: txn.sequence_number(),
max_gas_amount: GasUnits::new(txn.max_gas_amount()),
gas_unit_price: GasPrice::new(txn.gas_unit_price()),
transaction_size: AbstractMemorySize::new(txn.raw_txn_bytes_len() as u64),
expiration_timestamp_secs: txn.expiration_timestamp_secs(),
chain_id: txn.chain_id(),
script_hash: match txn.payload() {
TransactionPayload::Script(s) => HashValue::sha3_256_of(s.code()).to_vec(),
TransactionPayload::ScriptFunction(_) => vec![],
TransactionPayload::Module(_) => vec![],
TransactionPayload::WriteSet(_) => vec![],
},
}
}
pub fn max_gas_amount(&self) -> GasUnits<GasCarrier> {
self.max_gas_amount
}
pub fn gas_unit_price(&self) -> GasPrice<GasCarrier> {
self.gas_unit_price
}
pub fn sender(&self) -> AccountAddress {
self.sender.to_owned()
}
pub fn secondary_signers(&self) -> Vec<AccountAddress> {
self.secondary_signers.to_owned()
}
pub fn authentication_key_preimage(&self) -> &[u8] {
&self.authentication_key_preimage
}
pub fn sequence_number(&self) -> u64 {
self.sequence_number
}
pub fn transaction_size(&self) -> AbstractMemorySize<GasCarrier> {
self.transaction_size
}
pub fn expiration_timestamp_secs(&self) -> u64 {
self.expiration_timestamp_secs
}
pub fn chain_id(&self) -> ChainId {
self.chain_id
}
pub fn is_multi_agent(&self) -> bool {
!self.secondary_signers.is_empty()
}
}
impl Default for TransactionMetadata {
fn default() -> Self {
let mut buf = [0u8; Ed25519PrivateKey::LENGTH];
buf[Ed25519PrivateKey::LENGTH - 1] = 1;
let public_key = Ed25519PrivateKey::try_from(&buf[..]).unwrap().public_key();
TransactionMetadata {
sender: AccountAddress::ZERO,
authentication_key_preimage: AuthenticationKeyPreimage::ed25519(&public_key).into_vec(),
secondary_signers: vec![],
secondary_authentication_key_preimages: vec![],
sequence_number: 0,
max_gas_amount: GasUnits::new(100_000_000),
gas_unit_price: GasPrice::new(0),
transaction_size: AbstractMemorySize::new(0),
expiration_timestamp_secs: 0,
chain_id: ChainId::test(),
script_hash: vec![],
}
}
}