how to fix this issue

[seconbenji]

error[E0599]: no method named as_deref found for struct std::string::String in the current scope
--> src/services/flash_block.rs:261:56
|
261 | match self.try_send_transaction(encoded_tx.as_deref(), encoded_tx2.as_deref(), encoded_tip.as_deref(), is_bundle).await {
| ^^^^^^^^
|
help: there is a method as_ref with a similar name
|
261 - match self.try_send_transaction(encoded_tx.as_deref(), encoded_tx2.as_deref(), encoded_tip.as_deref(), is_bundle).await {
261 + match self.try_send_transaction(encoded_tx.as_ref(), encoded_tx2.as_deref(), encoded_tip.as_deref(), is_bundle).await {
|

error[E0308]: mismatched types
--> src/services/flash_block.rs:281:16
|
281 | if let Some(tx) = encoded_tx {
| ^^^^^^^^ ---------- this expression has type &str
| |
| expected str, found Option<_>
|
= note: expected type str
found enum std::option::Option<_>

[adams322111233221]

encoded_tx is a String, not an Option, so it doesn't have as_deref()