warning: writing `&String` instead of `&str` involves a new object where a slice will do
   --> trustchain-http/src/requester.rs:230:11
    |
230 |     ddid: &String,
    |           ^^^^^^^ help: change this to: `&str`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg

warning: writing `&PathBuf` instead of `&Path` involves a new object where a slice will do
   --> trustchain-http/src/attestation_utils.rs:213:44
    |
213 |     fn elementwise_deserialize(self, path: &PathBuf) -> Result<Option<Self>, TrustchainCRError>
    |                                            ^^^^^^^^ help: change this to: `&Path`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg

warning: writing `&PathBuf` instead of `&Path` involves a new object where a slice will do
   --> trustchain-http/src/attestation_utils.rs:199:43
    |
199 |     fn elementwise_serialize(&self, path: &PathBuf) -> Result<(), TrustchainCRError> {
    |                                           ^^^^^^^^ help: change this to: `&Path`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
    = note: `#[warn(clippy::ptr_arg)]` on by default

warning: direct implementation of `ToString`
   --> trustchain-http/src/attestation_utils.rs:166:1
    |
166 | / impl ToString for Nonce {
167 | |     fn to_string(&self) -> String {
168 | |         self.0.clone()
169 | |     }
170 | | }
    | |_^
    |
    = help: prefer implementing `Display` instead
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#to_string_trait_impl
    = note: `#[warn(clippy::to_string_trait_impl)]` on by default