web3swift-team · yaroslavyaroslav · Apr 19, 2022 · Apr 15, 2022 · Apr 15, 2022 · Apr 15, 2022
diff --git a/Documentation/README.md b/Documentation/README.md
@@ -74,35 +74,41 @@ Here are quick references for essential features:
 
     - [x] [EIP-155](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-155.md) (Replay attacks protection) *enforced!*
 
+    - [x] [EIP-165](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-165.md) (Standard Interface Detection, also known as ERC-165)
+
     - [x] [EIP-681](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-681.md) (A standard way of representing various transactions, especially payment requests in Ethers and ERC-20 tokens as URLs)
 
     - [x] [EIP-721](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-721.md) (A standard interface for non-fungible tokens, also known as deeds - ERC-721)
 
-    - [x] [EIP-165](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-165.md) (Standard Interface Detection, also known as ERC-165)
+    - [x] [EIP-721x](https://github.com/loomnetwork/erc721x) (An extension of ERC721 that adds support for multi-fungible tokens and batch transfers, while being fully backward-compatible, also known as ERC-721x)
 
     - [x] [EIP-777](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-777.md) (New Advanced Token Standard, also known as ERC-777)
 
     - [x] [EIP-820](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-820.md) (Pseudo-introspection Registry Contract, also known as ERC-820)
 
     - [x] [EIP-888](https://github.com/ethereum/EIPs/issues/888) (MultiDimensional Token Standard, also known as ERC-888)
 
+    - [x] [EIP-1155](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-1155.md) (Multi Token Standard, also known as ERC-1155)
+
+    - [x] [EIP-1376](https://github.com/ethereum/EIPs/issues/1376) (Service-Friendly Token, also known as ERC-1376)
+
     - [x] [EIP-1400](https://github.com/ethereum/EIPs/issues/1411) (Security Token Standard, also known as ERC-1400)
 
     - [x] [EIP-1410](https://github.com/ethereum/EIPs/issues/1410) (Partially Fungible Token Standard, also known as ERC-1410)
 
+    - [x] [EIP-1559](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md) (Fee market change for ETH 1.0 chain)
+
     - [x] [EIP-1594](https://github.com/ethereum/EIPs/issues/1594) (Core Security Token Standard, also known as ERC-1594)
 
+    - [x] [EIP-1633](https://github.com/ethereum/EIPs/issues/1634) (Re-Fungible Token, also known as ERC-1633)
+
     - [x] [EIP-1643](https://github.com/ethereum/EIPs/issues/1643) (Document Management Standard, also known as ERC-1643)
 
     - [x] [EIP-1644](https://github.com/ethereum/EIPs/issues/1644) (Controller Token Operation Standard, also known as ERC-1644)
 
-    - [x] [EIP-1633](https://github.com/ethereum/EIPs/issues/1634) (Re-Fungible Token, also known as ERC-1633)
-
-    - [x] [EIP-721x](https://github.com/loomnetwork/erc721x) (An extension of ERC721 that adds support for multi-fungible tokens and batch transfers, while being fully backward-compatible, also known as ERC-721x)
-
-    - [x] [EIP-1155](https://github.com/ethereum/EIPs/blob/develop/EIPS/eip-1155.md) (Multi Token Standard, also known as ERC-1155)
+    - [x] [EIP-2718](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-2718.md) (Typed Transaction Envelope)
 
-    - [x] [EIP-1376](https://github.com/ethereum/EIPs/issues/1376) (Service-Friendly Token, also known as ERC-1376)
+    - [x] [EIP-2930](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-2930.md) (Optional access lists)
 
     - [x] [ST-20](https://github.com/PolymathNetwork/polymath-core) - ST-20 token is an Ethereum-based token implemented on top of the ERC-20 protocol that adds the ability for tokens to control transfers based on specific rules
 

diff --git a/Documentation/Usage.md b/Documentation/Usage.md
@@ -32,6 +32,7 @@
       - [Send ERC-20 Token](#send-erc-20-token)
       - [Write Transaction and call smart contract method](#write-transaction-and-call-smart-contract-method)
       - [Read Transaction to call smart contract method](#read-transaction-to-call-smart-contract-method)
+      - [Other Transaction Types (EIP-1559)](#other-transaction-types)
     - [Send Transaction](#send-transaction)
       - [Write](#write)
       - [Read](#read)
@@ -355,6 +356,40 @@ let result = try! transaction.send(password: password)
 let result = try! transaction.call()
 ```
 
+##### Other Transaction Types
+
+By default a `legacy` transaction will be created which is compatible across all chains, regardless of which fork.
+To create one of the new transaction types introduced with the `london` fork you will need to set some additonal parameters 
+in the `TransactionOptions` object. Note you should only try to send one of tehse new types of transactions if you are on a chain 
+that supports them.
+
+To send an EIP-2930 style transacton with an access list you need to set the transaction type, and the access list, 
+in addition what is shown in the examples above.
+```swift
+let accessList: [AccessListEntry] = [
+    AccessListEntry(
+        address: EthereumAddress("0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"),
+        storageKeys: [BigUInt(3), BigUInt(7)]
+    ),
+    AccessListEntry(
+        address: EthereumAddress("0xbb9bc244d798123fde783fcc1c72d3bb8c189413"),
+        storageKeys: []
+    )
+]
+
+options.type = .eip2930
+options.accessList = accessList
+```
+
+To send an EIP-1559 style transaction you set the transaction type, and the new gas parameters `maxFeePerGas` and `maxPriorityFeePerGas`
+(you may also send an AccessList with an EIP-1559 transaction) When sending an EIP-1559 transaction, the older `gasPrice` parameter is ignored.
+```swift
+options.type = .eip1559
+options.maxFeePerGas = .manual(...) // the maximum price per unit of gas, inclusive of baseFee and tip
+options.maxPriorityFeePerGas = .manual(...) // the tip to be paid to the miner, per unit of gas
+```
+Note there is a new `Oracle` object available that can be used to assist with estimating the new gas fees
+
 ### Chain state
 
 #### Get Block number

diff --git a/README.md b/README.md
@@ -57,7 +57,7 @@
 - [x] ✅**Literally following the standards** (BIP, EIP, etc):
 
     - [x] **[BIP32](https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki) (HD Wallets), [BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki) (Seed phrases), [BIP44](https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki) (Key generation prefixes)**
-- [x] **[EIP-20](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md)** (Standart interface for tokens - ERC-20), **[EIP-67](https://github.com/ethereum/EIPs/issues/67)** (Standard URI scheme), **[EIP-155](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md)** (Replay attacks protection)
+- [x] **[EIP-20](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md)** (Standart interface for tokens - ERC-20), **[EIP-67](https://github.com/ethereum/EIPs/issues/67)** (Standard URI scheme), **[EIP-155](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md)** (Replay attacks protection), **[EIP-2718](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-2718.md)** (Typed Transaction Envelope), **[EIP-1559](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1559.md)** (Gas Fee market change)
     - [x] **And many others** *(For details about this EIP's look at [Documentation page](https://github.com/skywinder/web3swift/blob/master/Documentation/))*: EIP-681, EIP-721, EIP-165, EIP-777, EIP-820, EIP-888, EIP-1400, EIP-1410, EIP-1594, EIP-1643, EIP-1644, EIP-1633, EIP-721, EIP-1155, EIP-1376, ST-20
 
 - [x] 🗜 **Batched requests** in concurrent mode

diff --git a/Sources/web3swift/Transaction/EIP1559Envelope.swift b/Sources/web3swift/Transaction/EIP1559Envelope.swift
@@ -41,12 +41,6 @@ public struct EIP1559Envelope: EIP2718Envelope {
     public var maxFeePerGas: BigUInt
     public var accessList: [AccessListEntry] // from EIP-2930
 
-    /// EIP-1159 trnsactions do not have a gasPrice parameter
-    /// However, it appears that some nodes report a gasPrice, even for EIP-1159 transactions
-    /// thus for a temporary workaround we capture and store gasPrice if initialized from a JSON transaction
-    /// decided form a node. This is currently needed for Oracle to work
-    private var gasPrice: BigUInt = 0
-
     // for CustomStringConvertible
     public var description: String {
         var toReturn = ""
@@ -76,9 +70,6 @@ public struct EIP1559Envelope: EIP2718Envelope {
                 value: value,
                 data: data,
                 gasLimit: gasLimit,
-                // MARK: workaround for gasPrice coming from nodes for EIP-1159 - this allows Oracle to work for now
-                gasPrice: gasPrice,
-
                 maxFeePerGas: maxFeePerGas,
                 maxPriorityFeePerGas: maxPriorityFeePerGas,
                 accessList: accessList
@@ -94,8 +85,6 @@ public struct EIP1559Envelope: EIP2718Envelope {
             maxFeePerGas = val.maxFeePerGas ?? maxFeePerGas
             maxPriorityFeePerGas = val.maxPriorityFeePerGas ?? maxPriorityFeePerGas
             accessList = val.accessList ?? accessList
-            // MARK: workaround for gasPrice coming from nodes for EIP-1159 - this allows Oracle to work for now
-            gasPrice = val.gasPrice ?? gasPrice
         }
     }
 
@@ -117,8 +106,6 @@ extension EIP1559Envelope {
         case v
         case r
         case s
-        // MARK: workaround for gasPrice coming from nodes for EIP-1159 - this allows Oracle to work for now
-        case gasPrice
     }
 
     public init?(from decoder: Decoder) throws {
@@ -147,9 +134,6 @@ extension EIP1559Envelope {
             self.to = ethAddr
         }
 
-        // MARK: workaround for gasPrice coming from nodes for EIP-1159 - this allows Oracle to work for now
-        self.gasPrice = try container.decodeHexIfPresent(BigUInt.self, forKey: .gasPrice) ?? 5000000000
-
         self.value = try container.decodeHexIfPresent(BigUInt.self, forKey: .value) ?? 0
         self.maxPriorityFeePerGas = try container.decodeHexIfPresent(BigUInt.self, forKey: .maxPriorityFeePerGas) ?? 0
         self.maxFeePerGas = try container.decodeHexIfPresent(BigUInt.self, forKey: .maxFeePerGas) ?? 0
@@ -212,7 +196,7 @@ extension EIP1559Envelope {
 
         // swiftlint:disable force_unwrapping
         switch rlpItem[RlpKey.destination.rawValue]!.content {
-            // swiftlint:enable force_unwrapping
+        // swiftlint:enable force_unwrapping
         case .noItem:
             self.to = EthereumAddress.contractDeploymentAddress()
         case .data(let addressData):

diff --git a/Sources/web3swift/Transaction/EthereumMetadata.swift b/Sources/web3swift/Transaction/EthereumMetadata.swift
@@ -0,0 +1,57 @@
+//  Package: web3swift
+//  Created by Alex Vlasov.
+//  Copyright © 2018 Alex Vlasov. All rights reserved.
+//
+//  Additions for metadata by Mark Loit 2022
+
+import Foundation
+import BigInt
+
+/// This structure holds additional data
+/// returned by nodes when reading a transaction
+/// from the blockchain. The data here is not 
+/// part of the transaction itself
+public struct EthereumMetadata {
+
+    /// hash for the block that contains this transaction on chain
+    var blockHash: Data?
+
+    /// block number for the block containing this transaction on chain
+    var blockNumber: BigUInt?
+
+    /// index for this transaction within the containing block
+    var transactionIndex: UInt?
+
+    /// hash for this transaction as returned by the node [not computed]
+    /// this can be used for validation against the computed hash returned
+    /// by the transaction envelope.
+    var transactionHash: Data?
+
+    /// gasPrice value returned by the node
+    /// note this is a duplicate value for legacy and EIP-2930 transaction types
+    /// but is included here since EIP-1559 does not contain a `gasPrice`, but 
+    /// nodes still report the value.
+    var gasPrice: BigUInt?
+}
+
+public extension EthereumMetadata {
+    private enum CodingKeys: String, CodingKey {
+        case blockHash
+        case blockNumber
+        case transactionIndex
+        case transactionHash
+        case gasPrice
+    }
+
+    /// since metadata realistically can only come when a transaction is created from
+    /// JSON returned by a node, we only provide an intializer from JSON
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+
+        self.blockHash = try container.decodeHexIfPresent(Data.self, forKey: .blockHash)
+        self.transactionHash = try container.decodeHexIfPresent(Data.self, forKey: .transactionHash)
+        self.transactionIndex = try container.decodeHexIfPresent(UInt.self, forKey: .transactionIndex)
+        self.blockNumber = try container.decodeHexIfPresent(BigUInt.self, forKey: .blockNumber)
+        self.gasPrice = try container.decodeHexIfPresent(BigUInt.self, forKey: .gasPrice)
+    }
+}
diff --git a/Sources/web3swift/Transaction/EthereumTransaction.swift b/Sources/web3swift/Transaction/EthereumTransaction.swift
@@ -14,6 +14,10 @@ public struct EthereumTransaction: CustomStringConvertible {
     /// and type specific implementation
     internal var envelope: AbstractEnvelope
 
+    /// storage container for additional metadata returned by the node
+    /// when a transaction is decoded form a JSON stream
+    public var meta: EthereumMetadata?
+
     // convenience accessors to the common envelope fields
     // everything else should come from getOpts/setOpts
     /// The type of the transacton being represented, see TransactionType enum
@@ -227,6 +231,8 @@ extension EthereumTransaction: Decodable {
     public init(from decoder: Decoder) throws {
         guard let env = try EnvelopeFactory.createEnvelope(from: decoder) else { throw Web3Error.dataError }
         self.envelope = env
+        // capture any metadata that might be present
+        self.meta = try EthereumMetadata(from: decoder)
     }
 }
 
@@ -330,10 +336,7 @@ extension EthereumTransaction {
                 guard let env = self.envelope as? EIP2930Envelope else { preconditionFailure("Unable to downcast to EIP2930Envelope") }
                 return env.parameters.gasPrice ?? 0
             case .eip1559:
-                // MARK: workaround for gasPrice coming from nodes for EIP-1159 - this allows Oracle to work for now
-                guard let env = self.envelope as? EIP1559Envelope else { preconditionFailure("Unable to downcast to EIP1559Envelope") }
-                return env.parameters.gasPrice ?? 0
-                // preconditionFailure("EIP1559Envelope has no member gasPrice")
+                preconditionFailure("EIP1559Envelope has no member gasPrice")
             }
         }
         set(value) {

diff --git a/Sources/web3swift/Web3/Web3+GasOracle.swift b/Sources/web3swift/Web3/Web3+GasOracle.swift
@@ -139,7 +139,7 @@ extension Web3 {
                         return transaction
                     }
                 }
-                .map { $0.gasPrice }
+                .map { $0.meta?.gasPrice ?? 0 }
 
             return calculatePercentiles(for: lastNthBlockGasPrice)
         }

diff --git a/web3swift.xcodeproj/project.pbxproj b/web3swift.xcodeproj/project.pbxproj
@@ -202,6 +202,7 @@
 		6049F416280616FC00DFE624 /* LegacyEnvelope.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6049F40F280616FC00DFE624 /* LegacyEnvelope.swift */; };
 		6049F4182806171300DFE624 /* Web3+Signing.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6049F4172806171300DFE624 /* Web3+Signing.swift */; };
 		604FA4FF27ECBDC80021108F /* DataConversionTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 604FA4FE27ECBDC80021108F /* DataConversionTests.swift */; };
+		60C1786E2809BA0C0083F064 /* EthereumMetadata.swift in Sources */ = {isa = PBXBuildFile; fileRef = 60C1786D2809BA0C0083F064 /* EthereumMetadata.swift */; };
 		CB50A52827060BD600D7E39B /* EIP712Tests.swift in Sources */ = {isa = PBXBuildFile; fileRef = CB50A52727060BD600D7E39B /* EIP712Tests.swift */; };
 		D606A56B279F5D59003643ED /* web3swiftDecodeSolidityErrorType.swift in Sources */ = {isa = PBXBuildFile; fileRef = D606A56A279F5D59003643ED /* web3swiftDecodeSolidityErrorType.swift */; };
 		D6A3D9B827F1E785009E3BCF /* ABIEncoderSoliditySha3Test.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A3D9B727F1E785009E3BCF /* ABIEncoderSoliditySha3Test.swift */; };
@@ -433,6 +434,7 @@
 		6049F40F280616FC00DFE624 /* LegacyEnvelope.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LegacyEnvelope.swift; sourceTree = "<group>"; };
 		6049F4172806171300DFE624 /* Web3+Signing.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Web3+Signing.swift"; sourceTree = "<group>"; };
 		604FA4FE27ECBDC80021108F /* DataConversionTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DataConversionTests.swift; sourceTree = "<group>"; };
+		60C1786D2809BA0C0083F064 /* EthereumMetadata.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EthereumMetadata.swift; sourceTree = "<group>"; };
 		CB50A52727060BD600D7E39B /* EIP712Tests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = EIP712Tests.swift; sourceTree = "<group>"; };
 		CB50A52927060C5300D7E39B /* EIP712.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = EIP712.swift; sourceTree = "<group>"; };
 		D606A56A279F5D59003643ED /* web3swiftDecodeSolidityErrorType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = web3swiftDecodeSolidityErrorType.swift; sourceTree = "<group>"; };
@@ -720,6 +722,7 @@
 				6049F40F280616FC00DFE624 /* LegacyEnvelope.swift */,
 				3AA8153D2276E44100F5DB52 /* BloomFilter.swift */,
 				3AA8153F2276E44100F5DB52 /* EthereumTransaction.swift */,
+				60C1786D2809BA0C0083F064 /* EthereumMetadata.swift */,
 			);
 			path = Transaction;
 			sourceTree = "<group>";
@@ -1349,6 +1352,7 @@
 				3AA815C12276E44100F5DB52 /* Web3+BrowserFunctions.swift in Sources */,
 				3AA815E82276E44100F5DB52 /* Extensions.swift in Sources */,
 				3AA815FE2276E44100F5DB52 /* Web3+ERC820.swift in Sources */,
+				60C1786E2809BA0C0083F064 /* EthereumMetadata.swift in Sources */,
 				3AA815DB2276E44100F5DB52 /* Web3+TxPool.swift in Sources */,
 				3AA8160A2276E44100F5DB52 /* Web3+ERC1594.swift in Sources */,
 				3AA815FB2276E44100F5DB52 /* Promise+Web3+Personal+UnlockAccount.swift in Sources */,