diff --git a/build.gradle.kts b/build.gradle.kts
index 57beadb8..c31b223b 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,7 +12,7 @@ plugins {
 val currentOs = org.gradle.internal.os.OperatingSystem.current()
 
 group = "fr.acinq.bitcoin"
-version = "0.14.0-SNASPHOT"
+version = "0.14.0-SNAPSHOT"
 
 repositories {
     google()
diff --git a/src/commonMain/kotlin/fr/acinq/bitcoin/Bitcoin.kt b/src/commonMain/kotlin/fr/acinq/bitcoin/Bitcoin.kt
index 7c50a591..ea1f97dc 100644
--- a/src/commonMain/kotlin/fr/acinq/bitcoin/Bitcoin.kt
+++ b/src/commonMain/kotlin/fr/acinq/bitcoin/Bitcoin.kt
@@ -30,12 +30,12 @@ public sealed class AddressToPublicKeyScriptResult {
 
     public abstract val result: List<ScriptElt>?
 
-    public val isSuccess: Boolean = result != null
+    public fun isSuccess(): Boolean = result != null
 
-    public val isFailure: Boolean = !isSuccess
+    public fun isFailure(): Boolean = !isSuccess()
 
     public data class Success(val script: List<ScriptElt>) : AddressToPublicKeyScriptResult() {
-        override val result: List<ScriptElt>? = script
+        override val result: List<ScriptElt> = script
     }
 
     public sealed class Failure : AddressToPublicKeyScriptResult() {
@@ -61,11 +61,11 @@ public sealed class AddressToPublicKeyScriptResult {
 
 public sealed class AddressFromPublicKeyScriptResult {
     public abstract val result: String?
-    public val isSuccess: Boolean = result != null
-    public val isFailure: Boolean = !isSuccess
+    public fun isSuccess(): Boolean = result != null
+    public fun isFailure(): Boolean = !isSuccess()
 
     public data class Success(val address: String) : AddressFromPublicKeyScriptResult() {
-        override val result: String? = address
+        override val result: String = address
     }
 
     public sealed class Failure : AddressFromPublicKeyScriptResult() {
@@ -95,7 +95,7 @@ public object Bitcoin {
     /**
      * @param pub public key
      * @param chainHash chain hash (i.e. hash of the genesic block of the chain we're on)
-     * @return the p2swh-of-p2pkh address for this key). It is a Base58 address that is compatible with most bitcoin wallets
+     * @return the p2swh-of-p2pkh address for this key. It is a Base58 address that is compatible with most bitcoin wallets
      */
     @JvmStatic
     public fun computeP2ShOfP2WpkhAddress(pub: PublicKey, chainHash: ByteVector32): String = pub.p2shOfP2wpkhAddress(chainHash)
@@ -105,9 +105,9 @@ public object Bitcoin {
 
     /**
      * @param pub public key
-     * @param chainHash chain hash (i.e. hash of the genesic block of the chain we're on)
+     * @param chainHash chain hash (i.e. hash of the genesis block of the chain we're on)
      * @return the BIP84 address for this key (i.e. the p2wpkh address for this key). It is a Bech32 address that will be
-     *         understood only by native sewgit wallets
+     *         understood only by native segwit wallets
      */
     @JvmStatic
     public fun computeP2WpkhAddress(pub: PublicKey, chainHash: ByteVector32): String = pub.p2wpkhAddress(chainHash)
@@ -117,7 +117,7 @@ public object Bitcoin {
 
     /**
      * Compute an address from a public key script
-     * @param chainHash chain hash (i.e. hash of the genesic block of the chain we're on)
+     * @param chainHash chain hash (i.e. hash of the genesis block of the chain we're on)
      * @param pubkeyScript public key script
      */
     @JvmStatic
diff --git a/src/commonMain/kotlin/fr/acinq/bitcoin/ScriptElt.kt b/src/commonMain/kotlin/fr/acinq/bitcoin/ScriptElt.kt
index 98551a3c..734c1d79 100644
--- a/src/commonMain/kotlin/fr/acinq/bitcoin/ScriptElt.kt
+++ b/src/commonMain/kotlin/fr/acinq/bitcoin/ScriptElt.kt
@@ -422,7 +422,7 @@ public data class OP_PUSHDATA(@JvmField val data: ByteVector, @JvmField val opCo
         @JvmStatic
         public fun isMinimal(data: ByteArray, code: Int): Boolean {
             return when {
-                data.size == 0 -> code == OP_0.code
+                data.isEmpty() -> code == OP_0.code
                 data.size == 1 && data[0] >= 1 && data[0] <= 16 -> code == (OP_1.code).plus(data[0] - 1)
                 data.size == 1 && data[0] == 0x81.toByte() -> code == OP_1NEGATE.code
                 data.size <= 75 -> code == data.size
diff --git a/src/commonTest/kotlin/fr/acinq/bitcoin/BitcoinTestsCommon.kt b/src/commonTest/kotlin/fr/acinq/bitcoin/BitcoinTestsCommon.kt
index 2490e8ed..6f92ada5 100644
--- a/src/commonTest/kotlin/fr/acinq/bitcoin/BitcoinTestsCommon.kt
+++ b/src/commonTest/kotlin/fr/acinq/bitcoin/BitcoinTestsCommon.kt
@@ -40,9 +40,9 @@ class BitcoinTestsCommon {
             assertEquals(address(Script.pay2wpkh(pub), it).result, computeP2WpkhAddress(pub, it))
             assertEquals(address(Script.pay2sh(Script.pay2wpkh(pub)), it).result, computeP2ShOfP2WpkhAddress(pub, it))
             // all these chain hashes are invalid
-            assertTrue(address(Script.pay2pkh(pub), it.reversed()).isFailure)
-            assertTrue(address(Script.pay2wpkh(pub), it.reversed()).isFailure)
-            assertTrue(address(Script.pay2sh(Script.pay2wpkh(pub)), it.reversed()).isFailure)
+            assertTrue(address(Script.pay2pkh(pub), it.reversed()).isFailure())
+            assertTrue(address(Script.pay2wpkh(pub), it.reversed()).isFailure())
+            assertTrue(address(Script.pay2sh(Script.pay2wpkh(pub)), it.reversed()).isFailure())
         }
 
         listOf(