From 6fdbad6cd6daef41036205a5610cfb1b4456aacf Mon Sep 17 00:00:00 2001
From: ligi <ligi@ligi.de>
Date: Wed, 2 Jan 2019 01:05:59 +0100
Subject: [PATCH] Add module with support for EIP191 - closes #51

---
 eip191/.gitignore                             |  1 +
 eip191/build.gradle                           |  9 +++++++++
 .../kotlin/org/kethereum/eip191/EIP191.kt     | 19 +++++++++++++++++++
 settings.gradle                               |  3 ++-
 4 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 eip191/.gitignore
 create mode 100644 eip191/build.gradle
 create mode 100644 eip191/src/main/kotlin/org/kethereum/eip191/EIP191.kt

diff --git a/eip191/.gitignore b/eip191/.gitignore
new file mode 100644
index 00000000..796b96d1
--- /dev/null
+++ b/eip191/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/eip191/build.gradle b/eip191/build.gradle
new file mode 100644
index 00000000..80c35293
--- /dev/null
+++ b/eip191/build.gradle
@@ -0,0 +1,9 @@
+dependencies {
+    implementation project(":model")
+    implementation project(":crypto")
+    implementation project(":crypto_api")
+    implementation project(":functions")
+    implementation project(":rlp")
+
+    testImplementation "com.github.walleth:khex:$khex_version"
+}
diff --git a/eip191/src/main/kotlin/org/kethereum/eip191/EIP191.kt b/eip191/src/main/kotlin/org/kethereum/eip191/EIP191.kt
new file mode 100644
index 00000000..e5b94b8f
--- /dev/null
+++ b/eip191/src/main/kotlin/org/kethereum/eip191/EIP191.kt
@@ -0,0 +1,19 @@
+package org.kethereum.eip191
+
+import org.kethereum.crypto.model.ECKeyPair
+import org.kethereum.crypto.signMessage
+
+/*
+*
+* http://eips.ethereum.org/EIPS/eip-191
+*
+*/
+
+
+fun ECKeyPair.signWithEIP191(version: Byte, versionSpecificData: ByteArray, message: ByteArray) = signMessage(version.toByteArray() + versionSpecificData + message)
+
+
+fun ECKeyPair.signWithEIP191EthereumSignedMessageGrandfathering(message: ByteArray) =
+        signWithEIP191(19, "EthereumSignedMessage".toByteArray(), message)
+
+fun Byte.toByteArray() = ByteArray(1) { this }
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
index d2a8bf75..2422fe14 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -10,9 +10,10 @@ include ':crypto_api'
 include ':crypto_api_java_provider'
 include ':crypto_api_spongycastle'
 include ':crypto_api_wrapper'
-include ':eip155'
 include ':erc55'
 include ':erc67'
+include ':eip155'
+include ':eip191'
 include ':erc681'
 include ':erc831'
 include ':erc961'