From 89f42a69d1e0996848c77ebb8fe52fda7d532bf2 Mon Sep 17 00:00:00 2001
From: Igor Artamonov <igor@artamonov.ru>
Date: Wed, 17 Apr 2024 21:28:40 +0100
Subject: [PATCH] solution: make sure it produces a valid signature for a
 Sepolia tx

---
 .../emeraldpay/etherjar/tx/SignerSpec.groovy  | 38 +++++++++++++++++++
 .../etherjar/tx/TransactionEncoderSpec.groovy | 38 +++++++++++++++++++
 2 files changed, 76 insertions(+)

diff --git a/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/SignerSpec.groovy b/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/SignerSpec.groovy
index a654f39..bdb09a3 100644
--- a/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/SignerSpec.groovy
+++ b/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/SignerSpec.groovy
@@ -292,6 +292,44 @@ class SignerSpec extends Specification {
         Hex.encodeHexString(rlp) == "02f876018204d2843b9aca008504a817c800830249f0943535353535353535353535353535353535353535881121d3359738400080c001a0f0b3347ec48e78bf5ef6075b332334518ebc2f90d2bf0fea080623179936382ea05c58c5beeafb2398d5e79b40b320421112a9672167f27e7fc55e76d2d7d11062"
     }
 
+    def "Sign Sepolia"() {
+        setup:
+        TransactionWithGasPriority tx = new TransactionWithGasPriority()
+        tx.tap {
+            chainId = 11155111
+            nonce = 0x0123
+            maxGasPrice = Wei.ofUnits(20, Wei.Unit.GWEI)
+            priorityGasPrice = Wei.ofUnits(1, Wei.Unit.GWEI)
+            gas = 150_000 // 0x0249F0
+            to = Address.from("0x3535353535353535353535353535353535353535")
+            value = Wei.ofEthers(1)
+            accessList = []
+        }
+        PrivateKey pk = PrivateKey.create("0x4646464646464646464646464646464646464646464646464646464646464646")
+
+        when:
+        def hash = signer.hash(tx)
+
+        then:
+        Hex.encodeHexString(hash) == "c8dc2cc014237c5a09db43f575b41f89f4f55e4160a3a0e118250f102aec61ab"
+
+        when:
+        def act = signer.sign(tx, pk)
+        then:
+        act instanceof SignatureEIP2930
+        with((SignatureEIP2930)act) {
+            r.toString(16) == "ea3705d1137256ba5078c2d97a8886ea78e3c9ea4d3ffaa4985220705fdf02e1"
+            s.toString(16) == "f05771ac81ddb47283f592790db1205c6b321c3cdc5164b16d89898d0802647"
+            YParity == 1
+        }
+
+        when:
+        tx.signature = act
+        def rlp = encoder.encode(tx, true)
+        then:
+        Hex.encodeHexString(rlp) == "02f87983aa36a7820123843b9aca008504a817c800830249f0943535353535353535353535353535353535353535880de0b6b3a764000080c001a0ea3705d1137256ba5078c2d97a8886ea78e3c9ea4d3ffaa4985220705fdf02e1a00f05771ac81ddb47283f592790db1205c6b321c3cdc5164b16d89898d0802647"
+    }
+
     def "extract pubkey from base tx - 0x19442f"() {
         setup:
         Signature signature = new Signature()
diff --git a/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/TransactionEncoderSpec.groovy b/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/TransactionEncoderSpec.groovy
index 78b1bf2..80b1bf8 100644
--- a/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/TransactionEncoderSpec.groovy
+++ b/etherjar-tx/src/test/groovy/io/emeraldpay/etherjar/tx/TransactionEncoderSpec.groovy
@@ -216,4 +216,42 @@ class TransactionEncoderSpec extends Specification {
         then:
         Hex.encodeHexString(act) == "02f8b101819684ee6b280085134062da9b82c79d947bebd226154e865954a87650faefa8f485d3608180b844095ea7b300000000000000000000000003f7724180aa6b939894b5ca4314783b0b36b329ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffc001a0d978ed98e78dd480b2aec86d1521962a8fe4009e44fb19f45b70d8005e602182a0347c933f78131995c1abd07c1d0be67d8f04c2cf99cd79510657e97ead8c1a9f"
     }
+
+    def "Encode sepolia EIP-1559"() {
+        setup:
+        TransactionWithGasPriority tx = new TransactionWithGasPriority()
+        tx.tap {
+            chainId = 11155111 // 0xAA36A7
+            nonce = 0x0123
+            maxGasPrice = Wei.ofUnits(20, Wei.Unit.GWEI) // 0x04A817C800
+            priorityGasPrice = Wei.ofUnits(1, Wei.Unit.GWEI) // 0x3B9ACA00
+            gas = 150_000 // 0x0249F0
+            to = Address.from("0x3535353535353535353535353535353535353535")
+            value = Wei.ofEthers(1) // 0x0DE0B6B3A7640000
+            accessList = []
+        }
+        def exp = "" +
+            "02" + // type
+            "f6" +
+            "83" +
+            "aa36a7" + // chain id
+            "82" +
+            "0123" + // nonce
+            "84" +
+            "3b9aca00" + // priority gas price
+            "85" +
+            "04a817c800" + // max gas price
+            "83" +
+            "0249f0" + // gas
+            "94" +
+            "3535353535353535353535353535353535353535" + // to
+            "88" +
+            "0de0b6b3a7640000" + // value
+            "80" +
+            "c0"
+        when:
+        def act = encoder.encode(tx, false)
+        then:
+        Hex.encodeHexString(act) == exp
+    }
 }