Contractless/src/orphans/undo_transactions/undo_create_token.rs

use crate::blocks::token::CreateTokenTransaction;
use crate::common::network_paths_and_settings::block_extension_and_paths;
use crate::decode;
use crate::records::balance_sheet::operations::balance_sheet_operation_with_db;
use crate::records::record_chain::token_provenance::clear_token_history;
use crate::sled::Db;

pub async fn undo_create_token_transaction(
    transaction: CreateTokenTransaction,
    mining_receiver: &str,
    db: &Db,
) {
    // remove the created token state and restore the creator balances
    // when a create-token transaction is rolled back
    let operand_subtraction = "subtraction";
    let operand_addition = "addition";
    let (
        _network_name,
        _padded_base_coin,
        type_str,
        _torrentpath,
        _wallet_path,
        _blockpath,
        _db_path,
        _balance_path,
        _log_path,
    ) = block_extension_and_paths();
    let (txfee, creator, ticker, number) = (
        &transaction.unsigned_create_token.txfee,
        &transaction.unsigned_create_token.creator,
        &transaction.unsigned_create_token.ticker,
        &transaction.unsigned_create_token.number,
    );

    // Remove the miner fee, refund the creator fee, and remove the created
    // supply from the creator balance.
    let _ = balance_sheet_operation_with_db(
        db,
        mining_receiver,
        *txfee,
        &type_str,
        operand_subtraction,
    );
    let _ = balance_sheet_operation_with_db(db, creator, *txfee, &type_str, operand_addition);
    let _ = balance_sheet_operation_with_db(db, creator, *number, ticker, operand_subtraction);

    let ticker_binary = &transaction.unsigned_create_token.ticker.as_bytes();
    let hash_binary = decode(&transaction.unsigned_create_token.hash().await).unwrap();

    // Remove the create-token transaction lookup from the txid tree.
    let tree = db.open_tree("txid").unwrap();
    let key = hash_binary.clone();
    tree.remove(key).unwrap();

    // remove the token definition and origin entry
    // created when the token was first saved
    let tree = db.open_tree("tokens").unwrap();
    let key = ticker_binary;
    tree.remove(key).unwrap();

    let origin_tree = db.open_tree("token_origins").unwrap();
    origin_tree.remove(key).unwrap();

    let limit_tree = db.open_tree("token_limits").unwrap();
    limit_tree.remove(key).unwrap();
    // Token history is cleared because the token itself no longer exists.
    let _ = clear_token_history(db, ticker);
}