Make AbstractEnvelope and all relevant to it types internal,

to give ability to refactor them after release.

Author: yaroslavyaroslav

Sources/Core/Transaction/Envelope/AbstractEnvelope.swift

@@ -63,7 +63,7 @@ public enum EncodeType {
 /// All envelopes must conform to this protocol to work with `CodableTransaction`
 /// each implememtation holds all the type specific data
 /// and implments the type specific encoding/decoding
-public protocol AbstractEnvelope: CustomStringConvertible { // possibly add Codable?
+protocol AbstractEnvelope: CustomStringConvertible { // possibly add Codable?
 
     /// The type of transaction this envelope represents
     var type: TransactionType { get }
@@ -139,7 +139,7 @@ public protocol AbstractEnvelope: CustomStringConvertible { // possibly add Coda
     mutating func clearSignatureData()
 }
 
-public extension AbstractEnvelope {
+extension AbstractEnvelope {
 
     var sender: EthereumAddress? {
         guard let publicKey = publicKey else { return nil }

Sources/Core/Transaction/Envelope/EIP2718Envelope.swift

@@ -9,7 +9,7 @@ import BigInt
 // EIP-2718 is an abstract envelope type
 // All typed transactions should inherit from this type and not AbstractEnvelope
 // This is just a convenience handle so we can extend with default implementations for EIP-2718 type transactions (currently EIP-2930 and EIP-1559)
-public protocol EIP2718Envelope: AbstractEnvelope {
+protocol EIP2718Envelope: AbstractEnvelope {
     // type: -- Technically 'type' should be here, but it was promoted up to AbstractEnvelope, so we could wrap a LegacyTransaction as well
 }