Attempting cargo build encountered a question

[thejoven]

error: external crate `async_trait` unused in `atomicalsir`: remove the dependency or add `use async_trait as _;`
  |
note: the lint level is defined here
 --> src/main.rs:1:23
  |
1 | #![deny(missing_docs, unused_crate_dependencies)]
  |                       ^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0706]: functions in traits cannot be declared `async`
  --> src/electrumx.rs:22:2
   |
22 |       async fn post<U, P, R>(&self, uri: U, params: P) -> Result<R>
   |       ^----
   |       |
   |  _____`async` because of this
   | |
23 | |     where
24 | |         U: AsRef<str>,
25 | |         P: Serialize,
26 | |         R: DeserializeOwned;
   | |____________________________^
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> src/electrumx.rs:37:2
   |
37 |       async fn get_by_ticker<S>(&self, ticker: S) -> Result<Ticker>
   |       ^----
   |       |
   |  _____`async` because of this
   | |
38 | |     where
39 | |         S: AsRef<str>,
   | |______________________^
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> src/electrumx.rs:51:2
   |
51 |       async fn get_ft_info<S>(&self, atomical_id: S) -> Result<ResponseResult<Ft>>
   |       ^----
   |       |
   |  _____`async` because of this
   | |
52 | |     where
53 | |         S: AsRef<str>,
   | |______________________^
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> src/electrumx.rs:64:2
   |
64 |       async fn get_unspent_address<S>(&self, address: S) -> Result<Vec<Utxo>>
   |       ^----
   |       |
   |  _____`async` because of this
   | |
65 | |     where
66 | |         S: AsRef<str>,
   | |______________________^
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> src/electrumx.rs:74:2
   |
74 |       async fn get_unspent_scripthash<S>(&self, scripthash: S) -> Result<Vec<Utxo>>
   |       ^----
   |       |
   |  _____`async` because of this
   | |
75 | |     where
76 | |         S: AsRef<str>,
   | |______________________^
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> src/electrumx.rs:94:2
   |
94 |       async fn wait_until_utxo<S>(&self, address: S, satoshis: u64) -> Result<Utxo>
   |       ^----
   |       |
   |  _____`async` because of this
   | |
95 | |     where
96 | |         S: AsRef<str>,
   | |______________________^
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
   --> src/electrumx.rs:112:2
    |
112 |       async fn broadcast<S>(&self, tx: S) -> Result<serde_json::Value>
    |       ^----
    |       |
    |  _____`async` because of this
    | |
113 | |     where
114 | |         S: AsRef<str>,
    | |______________________^
    |
    = note: `async` trait functions are not currently supported
    = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
    = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
   --> src/electrumx.rs:141:2
    |
141 |       async fn post<U, P, R>(&self, uri: U, params: P) -> Result<R>
    |       ^----
    |       |
    |  _____`async` because of this
    | |
142 | |     where
143 | |         U: AsRef<str>,
144 | |         P: Serialize,
145 | |         R: DeserializeOwned,
    | |____________________________^
    |
    = note: `async` trait functions are not currently supported
    = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
    = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
    = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

For more information about this error, try `rustc --explain E0706`.
error: could not compile `atomicalsir` (bin "atomicalsir") due to 9 previous errors

[AurevoirXavier]

I'm not sure which version you're using, but the latest code definitely doesn't include async_trait.

Try the latest main branch code.