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use crate::blocks::{Block, BlockHash, BlockType, Previous};
use crate::node::controller::Controller;
use crate::node::messages::confirm_ack::{Confirm, ConfirmAck};
use crate::{Public, Rai, Signature};
use anyhow::{anyhow, Context};
use tracing::{debug, instrument, warn};
struct AccountDelta {
from: Public,
to: Public,
amount: Rai,
}
impl Controller {
#[instrument(skip(self))]
pub async fn add_vote(&mut self, confirm_ack: &ConfirmAck) -> anyhow::Result<()> {
let context = || format!("Adding vote {:?}", &confirm_ack);
let hashes = if let Confirm::VoteByHash(hashes) = &confirm_ack.confirm {
hashes
} else {
return Err(anyhow!("Confirm::Block not implemented")).with_context(context);
};
for hash in hashes {
self.validate_vote(hash, &confirm_ack.account, &confirm_ack.signature)
.await
.with_context(context)?;
self.state
.lock()
.await
.add_vote(hash, &confirm_ack.account)
.await
.with_context(context)?;
// self.check_votes(&confirm_ack.confirm)
// .await
// .with_context(context)?;
}
Ok(())
}
#[instrument(skip(self))]
pub async fn validate_vote(
&mut self,
hash: &BlockHash,
representative: &Public,
signature: &Signature,
) -> anyhow::Result<()> {
warn!("TODO validate vote");
Ok(())
}
/// Add a block that has been deemed valid by ORV.
///
/// Before adding a block we need to make sure it:
/// * Doesn't already exist.
/// * Verify the work.
/// * Verify the signature.
/// * Handle the specific block type appropriately.
///
/// After adding we need to update any representative weights.
pub async fn add_elected_block(&mut self, block: &Block) -> anyhow::Result<()> {
debug!("Adding elected block {:?}", &block);
let context = || format!("Block {:?}", &block);
let block_hash = block.hash().with_context(context)?;
// Block already exists, we can ignore this.
// In reality this shouldn't even happen so it should be a panic.
// This function should only have the chance to be called once per block.
if self
.state
.lock()
.await
.get_block_by_hash(&block_hash)
.await
.with_context(context)?
.is_some()
{
return Err(anyhow!("Block already exists")).with_context(context);
}
let context = || format!("Block {:?}", block);
block
.verify_signature(&block.account())
.context("Incorrect signature")
.with_context(context)?;
let work = block.work();
if work.is_none() {
return Err(anyhow!("Work is missing from block")).with_context(context);
}
// TODO: Verify work
// TODO: For now just assume this is a send block
match block.block_type() {
BlockType::Send => {
dbg!(block);
let previous_hash = match block.previous() {
Previous::Block(h) => h,
Previous::Open => {
return Err(anyhow!("Send block has a blank previous block hash"))
.with_context(context)
}
};
let prev_block = self
.state
.lock()
.await
.get_block_by_hash(previous_hash)
.await
.context("Previous block")
.with_context(context)?
.ok_or_else(|| anyhow!("Could not find previous block"))
.with_context(context)?;
let prev_balance = prev_block.balance();
if block.balance() >= prev_balance {
return Err(anyhow!(
"Can not increase balance in a send block. Prev: {:?}",
prev_block
))
.with_context(context);
}
let _to_account = block.destination().with_context(context)?;
let _amount = prev_balance
.checked_sub(block.balance())
.ok_or_else(|| {
anyhow!(
"Subtracting prev_balance {:?} and new balance {:?}",
prev_balance,
block.balance()
)
})
.with_context(context)?;
}
BlockType::Open => {
dbg!(block);
// If the block is the genesis block, we basically just trust the balance.
if !block.is_genesis(&self.network)? {
// TODO: Make sure the balance in the open block matches the amount in the
// send block.
}
}
_ => todo!(),
}
self.state
.lock()
.await
.add_block(block)
.await
.with_context(context)?;
// self.balance_rep_weights(block)
// .await
// .with_context(context)?;
Ok(())
}
pub async fn get_latest_block(&self, account: &Public) -> anyhow::Result<Option<Block>> {
let block_hash = self
.state
.lock()
.await
.get_latest_block_hash_for_account(account)
.await
.with_context(|| format!("Account: {:?}", account))?;
let block_hash = match block_hash {
Some(b) => b,
None => return Ok(None),
};
Ok(self
.state
.lock()
.await
.get_block_by_hash(&block_hash)
.await
.with_context(|| {
format!(
"Could not get block for latest hash for account: {:?}",
account
)
})?)
}
}