Error when compiling

error[E0599]: no method named `open_db_with_flags` found for struct `libmdbx::Transaction<'env, M, NoWriteMap>` in the current scope
   --> /home/m4tsuri/.cargo/git/checkouts/erigon-db-118ee4f05d317cb2/f1a7261/src/kv/mod.rs:142:24
    |
142 |             self.inner.open_db_with_flags(Some(Db::NAME), flags)?,
    |                        ^^^^^^^^^^^^^^^^^^ method not found in `libmdbx::Transaction<'env, M, NoWriteMap>`
    |
    = note: the method was found for
            - `libmdbx::Transaction<'env, RW, E>`

• erigon_db: version: f1a7261
• rust version: rustc 1.65.0-nightly (c07a8b4e0 2022-08-26)

I'm running into a compiler issue when attempting to import erigon-db into a project I'm working on. I'm new to Rust, so I'm probably missing something simple.

Cloning and running erigon-db from source with the following main.rs file leads to the code compiling and running as expected

git clone erigon-db
cd erigon-db
cargo run --bin erigon-db

// ./erigon-db/src/main.rs 
use erigon_db::{Erigon, env_open};
use ethereum_types::Address;
use std::fs::File;
use std::io::Write;
use std::io::LineWriter;

fn main() -> eyre::Result<()> {
    let path = std::path::Path::new(env!("ERIGON_CHAINDATA"));

    // Open an mdbx environment and begin a read-only database transaction
    let env = env_open(path)?;
    let db = Erigon::begin(&env)?;

    // get the current state of an account
    let contract: Address = "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f".parse()?; //univ2factory
    let account = db.read_account(contract)?.unwrap();

    // write populated storage slots to file
    let file = File::create("output.txt")?;
    let mut file = LineWriter::new(file);

    for read in db.walk_storage(contract, account.incarnation, None)? {
        let (slot, value) = read?;
        file.write(format!("{}: {}\n", slot, value).as_bytes())?;
    }

    Ok(())
}

However, when I create a new cargo project and use erigon-db as a dependency:

# Cargo.toml
# --snip--
[dependencies]
erigon-db = {git = "https://github.com/gio256/erigon-db"}
ethers = { git = "https://github.com/gakonst/ethers-rs", optional = true }

I get the following error when running cargo run:

error[E0277]: the trait bound `U256: MaxEncodedLenAssoc` is not satisfied
   --> /home/plotchy/.cargo/git/checkouts/erigon-db-118ee4f05d317cb2/9b1347a/src/erigon/macros.rs:306:13
    |
306 |             ::fastrlp::RlpMaxEncodedLen,
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `MaxEncodedLenAssoc` is not implemented for `U256`
    |
   ::: /home/plotchy/.cargo/git/checkouts/erigon-db-118ee4f05d317cb2/9b1347a/src/erigon/models/transaction.rs:93:1
    |
93  | decl_u256_wrapper!(VPackChainId);
    | -------------------------------- in this macro invocation
    |
    = help: the following other types implement trait `MaxEncodedLenAssoc`:
              Bloom
              H128
              H160
              H256
              H512
              H520
              H64
              VPackChainId
            and 12 others
    = note: this error originates in the derive macro `::fastrlp::RlpMaxEncodedLen` (in Nightly builds, run with -Z macro-backtrace for more info)

It seems that the forked repo with the uint patches created in the develop branch of gio256/fastrlp is not being found?

The project fails to build on fresh checkout with the following issues. It is very likely I'm just being dumb, but wanted to enquire anyhow.

error: there is no argument named `expected`
.cargo/git/checkouts/fastrlp-4d3cd332b9d5b08f/70f5c13/src/decode.rs:74:59
   |
74 |                 write!(f, "list length mismatch: expected {expected}, got {got}")
   |                                                           ^^^^^^^^^^

error: there is no argument named `got`
.cargo/git/checkouts/fastrlp-4d3cd332b9d5b08f/70f5c13/src/decode.rs:74:75
   |
74 |                 write!(f, "list length mismatch: expected {expected}, got {got}")
   |                                                                           ^^^^^

error: there is no argument named `err`
cargo/git/checkouts/fastrlp-4d3cd332b9d5b08f/70f5c13/src/decode.rs:76:52
   |
76 |             DecodeError::Custom(err) => write!(f, "{err}"),
   |                                                    ^^^^^
error: could not compile `fastrlp` due to 3 previous errors

This pr for ethers-rs has made ethers-solc an optional feature: https://github.com/gakonst/ethers-rs/pull/1463

build.rs depends on ethers::solc

[build-dependencies]
ethers = { git = "https://github.com/gakonst/ethers-rs" , features = ["ethers-solc"]}

After making the change, build.rs still fails to compile. I'm not familiar with the logic in that file, otherwise I would've made the fix a PR. Hope this helps.

error[E0061]: this function takes 2 arguments but 1 argument was supplied
   --> /home/plotchy/.cargo/git/checkouts/erigon-db-d1f243f9aeca17a7/d88f5bf/build.rs:29:31
    |
29  |         let contract = output.find(name).ok_or_else(|| {
    |                               ^^^^------ an argument is missing
    |
note: associated function defined here
   --> /home/plotchy/.cargo/git/checkouts/ethers-rs-c3a7c0a0ae0fe6be/8db1899/ethers-solc/src/compile/output/mod.rs:246:12
    |
246 |     pub fn find(&self, path: impl AsRef<str>, contract: impl AsRef<str>) -> Option<&T::Artifact> {
    |            ^^^^
help: provide the argument
    |
29  |         let contract = output.find(name, {_}).ok_or_else(|| {
    |                               ~~~~~~~~~~~~~~~

Currently this crate is heavily using eyre::Report as its error type, even in public APIs. However, according to eyre's docs, this is not recommended.

I'm trying to add a public error type to this crate. If you are interested, I'll make a PR later. Thank you.