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mod worker;
pub use worker::MappingSyncWorker;
use sp_runtime::{generic::BlockId, traits::{Block as BlockT, Header as HeaderT, Zero}};
use sp_api::ProvideRuntimeApi;
use sc_client_api::BlockOf;
use sp_blockchain::HeaderBackend;
use fp_rpc::EthereumRuntimeRPCApi;
pub fn sync_block<Block: BlockT>(
backend: &fc_db::Backend<Block>,
header: &Block::Header,
) -> Result<(), String> {
let log = fp_consensus::find_log(header.digest()).map_err(|e| format!("{:?}", e))?;
let post_hashes = log.into_hashes();
let mapping_commitment = fc_db::MappingCommitment {
block_hash: header.hash(),
ethereum_block_hash: post_hashes.block_hash,
ethereum_transaction_hashes: post_hashes.transaction_hashes,
};
backend.mapping().write_hashes(mapping_commitment)?;
Ok(())
}
pub fn sync_genesis_block<Block: BlockT, C>(
client: &C,
backend: &fc_db::Backend<Block>,
header: &Block::Header,
) -> Result<(), String> where
C: ProvideRuntimeApi<Block> + Send + Sync + HeaderBackend<Block> + BlockOf,
C::Api: EthereumRuntimeRPCApi<Block>,
{
let id = BlockId::Hash(header.hash());
let block = client.runtime_api().current_block(&id)
.map_err(|e| format!("{:?}", e))?;
let block_hash = block.ok_or("Ethereum genesis block not found".to_string())?.header.hash();
let mapping_commitment = fc_db::MappingCommitment::<Block> {
block_hash: header.hash(),
ethereum_block_hash: block_hash,
ethereum_transaction_hashes: Vec::new(),
};
backend.mapping().write_hashes(mapping_commitment)?;
Ok(())
}
pub fn sync_one_block<Block: BlockT, C, B>(
client: &C,
substrate_backend: &B,
frontier_backend: &fc_db::Backend<Block>,
) -> Result<bool, String> where
C: ProvideRuntimeApi<Block> + Send + Sync + HeaderBackend<Block> + BlockOf,
C::Api: EthereumRuntimeRPCApi<Block>,
B: sp_blockchain::HeaderBackend<Block> + sp_blockchain::Backend<Block>,
{
let mut current_syncing_tips = frontier_backend.meta().current_syncing_tips()?;
if current_syncing_tips.is_empty() {
let mut leaves = substrate_backend.leaves().map_err(|e| format!("{:?}", e))?;
if leaves.is_empty() {
return Ok(false)
}
current_syncing_tips.append(&mut leaves);
}
let mut operating_tip = None;
while let Some(checking_tip) = current_syncing_tips.pop() {
if !frontier_backend.mapping().is_synced(&checking_tip).map_err(|e| format!("{:?}", e))? {
operating_tip = Some(checking_tip);
break
}
}
let operating_tip = match operating_tip {
Some(operating_tip) => operating_tip,
None => {
frontier_backend.meta().write_current_syncing_tips(current_syncing_tips)?;
return Ok(false)
}
};
let operating_header = substrate_backend.header(BlockId::Hash(operating_tip))
.map_err(|e| format!("{:?}", e))?
.ok_or("Header not found".to_string())?;
if operating_header.number() == &Zero::zero() {
sync_genesis_block(client, frontier_backend, &operating_header)?;
frontier_backend.meta().write_current_syncing_tips(current_syncing_tips)?;
Ok(true)
} else {
sync_block(frontier_backend, &operating_header)?;
current_syncing_tips.push(*operating_header.parent_hash());
frontier_backend.meta().write_current_syncing_tips(current_syncing_tips)?;
Ok(true)
}
}
pub fn sync_blocks<Block: BlockT, C, B>(
client: &C,
substrate_backend: &B,
frontier_backend: &fc_db::Backend<Block>,
limit: usize,
) -> Result<bool, String> where
C: ProvideRuntimeApi<Block> + Send + Sync + HeaderBackend<Block> + BlockOf,
C::Api: EthereumRuntimeRPCApi<Block>,
B: sp_blockchain::HeaderBackend<Block> + sp_blockchain::Backend<Block>,
{
let mut synced_any = false;
for _ in 0..limit {
synced_any = synced_any || sync_one_block(client, substrate_backend, frontier_backend)?;
}
Ok(synced_any)
}