Abstract Method Dependency on

[coderabbitai]

The addition of the method in introduces a tight coupling to , which may not be appropriate for all signers. This issue was raised during the review of PR #2234 (#2234 (comment)). Consider abstracting this functionality into a more generic interface or providing a mechanism to access private keys that doesn't tightly couple to .

[greptile-apps]

To address the tight coupling introduced by the method in PR #2234, follow these steps:

1. Define a Generic Interface: Create a new interface in /ethergo/signer/signer that abstracts the signing functionality.

// signer.go
package signer

type Signer interface {
    SignTransaction(tx *Transaction) ([]byte, error)
    GetPublicKey() ([]byte, error)
}

2. Implement the Interface in Existing Signers: Modify AwsSigner, GcpSigner, and LocalSigner to implement the new Signer interface.

// awssigner.go
package awssigner

import "path/to/signer"

type AwsSigner struct {
    // existing fields
}

func (a *AwsSigner) SignTransaction(tx *Transaction) ([]byte, error) {
    // existing implementation
}

func (a *AwsSigner) GetPublicKey() ([]byte, error) {
    // existing implementation
}

3. Refactor Dependency Injection: Update the codebase to use the new Signer interface instead of concrete implementations.

// usage_example.go
package main

import "path/to/signer"

func ProcessTransaction(s signer.Signer, tx *Transaction) error {
    signedTx, err := s.SignTransaction(tx)
    if err != nil {
        return err
    }
    // further processing
    return nil
}

This approach abstracts the signing functionality and reduces tight coupling to specific signer implementations.

References

/ethergo/signer/signer/README.md
/ethergo/signer/signer/awssigner
/ethergo/signer/wallet

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