Add Chain type (#117)

ACINQ · Feb 13, 2024 · 44a4e57 · 44a4e57
1 parent 7d9f499
commit 44a4e57
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diff --git a/src/commonMain/kotlin/fr/acinq/bitcoin/Bitcoin.kt b/src/commonMain/kotlin/fr/acinq/bitcoin/Bitcoin.kt
@@ -234,4 +234,18 @@ public object Bitcoin {
             }
         )
     }
+
+    public sealed class Chain(public val name: String, private val genesis: Block) {
+        public object Regtest : Chain("Regtest", Block.RegtestGenesisBlock)
+        public object Testnet : Chain("Testnet", Block.TestnetGenesisBlock)
+        public object Signet : Chain("Signet", Block.SignetGenesisBlock)
+        public object Mainnet : Chain("Mainnet", Block.LivenetGenesisBlock)
+
+        public fun isMainnet(): Boolean = this is Mainnet
+        public fun isTestnet(): Boolean = this is Testnet
+
+        public val chainHash: BlockHash get() = genesis.hash
+
+        override fun toString(): String = name
+    }
 }
diff --git a/src/commonTest/kotlin/fr/acinq/bitcoin/BitcoinTestsCommon.kt b/src/commonTest/kotlin/fr/acinq/bitcoin/BitcoinTestsCommon.kt
@@ -122,4 +122,12 @@ class BitcoinTestsCommon {
         assertEquals(Block.TestnetGenesisBlock.blockId, BlockId("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"))
         assertEquals(Block.LivenetGenesisBlock.blockId, BlockId("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"))
     }
+
+    @Test
+    fun `check Chain objects`() {
+        assertEquals(Block.RegtestGenesisBlock.hash, Bitcoin.Chain.Regtest.chainHash)
+        assertEquals(Block.SignetGenesisBlock.hash, Bitcoin.Chain.Signet.chainHash)
+        assertEquals(Block.TestnetGenesisBlock.hash, Bitcoin.Chain.Testnet.chainHash)
+        assertEquals(Block.LivenetGenesisBlock.hash, Bitcoin.Chain.Mainnet.chainHash)
+    }
 }