feat: Bitcoin API client, balance reading, and node health checks

Adds a mempool.space-style REST client (RealBitcoinApi, with the same retry-on-429 pattern as TronGridApi), a polling AssetBalance implementation, and BitcoinNodeHealthStateTester so the Networks screen can show live health for Bitcoin nodes (mirrors TronNodeHealthStateTester's rationale: mempool.space speaks plain REST, not JSON-RPC, so the existing Ethereum/ Substrate testers can't be reused). Wires Chain.Asset.Type.BitcoinNative through the asset-type mappers and TypeBasedAssetSourceRegistry, and BitcoinAssetsModule into AssetsModule - transfers/history stay on the Unsupported stubs until send support lands.
2026-07-22 13:45:48 +00:00 · 2026-07-12 14:59:05 -07:00
parent db1476f119
commit 69b311cb47
17 changed files with 336 additions and 7 deletions
@@ -0,0 +1,42 @@
+package io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin
+
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.types.Balance
+import kotlinx.coroutines.delay
+import retrofit2.HttpException
+import java.math.BigInteger
+
+interface BitcoinApi {
+
+    suspend fun fetchNativeBalance(baseUrl: String, address: String): Balance
+}
+
+class RealBitcoinApi(
+    private val retrofitApi: RetrofitBitcoinApi
+) : BitcoinApi {
+
+    override suspend fun fetchNativeBalance(baseUrl: String, address: String): Balance {
+        val stats = retryOn429 { retrofitApi.getAddress(addressUrl(baseUrl, address)) }.chainStats
+            ?: return BigInteger.ZERO
+
+        val funded = stats.fundedTxoSum ?: 0L
+        val spent = stats.spentTxoSum ?: 0L
+
+        return (funded - spent).toBigInteger().coerceAtLeast(BigInteger.ZERO)
+    }
+
+    private fun addressUrl(baseUrl: String, address: String): String {
+        return "${baseUrl.trimEnd('/')}/address/$address"
+    }
+
+    private suspend fun <T> retryOn429(maxAttempts: Int = 4, block: suspend () -> T): T {
+        repeat(maxAttempts - 1) { attempt ->
+            try {
+                return block()
+            } catch (e: HttpException) {
+                if (e.code() != 429) throw e
+                delay(1_000L * (attempt + 1))
+            }
+        }
+        return block()
+    }
+}
@@ -0,0 +1,14 @@
+package io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin
+
+import io.novafoundation.nova.common.data.network.UserAgent
+import io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin.model.BitcoinAddressResponse
+import retrofit2.http.GET
+import retrofit2.http.Headers
+import retrofit2.http.Url
+
+interface RetrofitBitcoinApi {
+
+    @GET
+    @Headers(UserAgent.NOVA)
+    suspend fun getAddress(@Url url: String): BitcoinAddressResponse
+}
@@ -0,0 +1,22 @@
+package io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin.model
+
+import com.google.gson.annotations.SerializedName
+
+/**
+ * Response shape of mempool.space's `GET /address/{address}`.
+ *
+ * `chainStats` reflects only confirmed on-chain activity; `mempoolStats` (unconfirmed) is deliberately not
+ * used for balance - matching the exchange's proven 2-confirmation-required posture for this same API.
+ */
+class BitcoinAddressResponse(
+    @SerializedName("chain_stats")
+    val chainStats: BitcoinAddressStats? = null,
+)
+
+class BitcoinAddressStats(
+    @SerializedName("funded_txo_sum")
+    val fundedTxoSum: Long? = null,
+
+    @SerializedName("spent_txo_sum")
+    val spentTxoSum: Long? = null,
+)
@@ -31,6 +31,7 @@ class TypeBasedAssetSourceRegistry(
    private val equilibriumAssetSource: Lazy<AssetSource>,
    private val tronNativeSource: Lazy<AssetSource>,
    private val trc20Source: Lazy<AssetSource>,
+    private val bitcoinNativeSource: Lazy<AssetSource>,
    private val unsupportedBalanceSource: AssetSource,

    private val nativeAssetEventDetector: NativeAssetEventDetector,
@@ -49,6 +50,7 @@ class TypeBasedAssetSourceRegistry(
            is Chain.Asset.Type.Equilibrium -> equilibriumAssetSource.get()
            is Chain.Asset.Type.TronNative -> tronNativeSource.get()
            is Chain.Asset.Type.Trc20 -> trc20Source.get()
+            is Chain.Asset.Type.BitcoinNative -> bitcoinNativeSource.get()
            Chain.Asset.Type.Unsupported -> unsupportedBalanceSource
        }
    }
@@ -63,6 +65,7 @@ class TypeBasedAssetSourceRegistry(
            add(equilibriumAssetSource.get())
            add(tronNativeSource.get())
            add(trc20Source.get())
+            add(bitcoinNativeSource.get())
        }
    }

@@ -72,6 +75,7 @@ class TypeBasedAssetSourceRegistry(
            Chain.Asset.Type.EvmNative,
            is Chain.Asset.Type.TronNative,
            is Chain.Asset.Type.Trc20,
+            is Chain.Asset.Type.BitcoinNative,

            Chain.Asset.Type.Unsupported -> UnsupportedEventDetector()

@@ -0,0 +1,30 @@
+package io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets.balances.bitcoinNative
+
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.types.Balance
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+
+private const val BITCOIN_BALANCE_POLLING_INTERVAL_MS = 30_000L
+
+/**
+ * mempool.space is a plain REST API with no push/subscription mechanism, same as TronGrid - see
+ * `TronBalancePolling.pollingBalanceFlow`'s doc for the full rationale this mirrors.
+ */
+internal fun pollingBalanceFlow(
+    intervalMs: Long = BITCOIN_BALANCE_POLLING_INTERVAL_MS,
+    fetch: suspend () -> Balance
+): Flow<Balance> = flow {
+    var lastEmitted: Balance? = null
+
+    while (true) {
+        val latest = fetch()
+
+        if (latest != lastEmitted) {
+            lastEmitted = latest
+            emit(latest)
+        }
+
+        delay(intervalMs)
+    }
+}
@@ -0,0 +1,83 @@
+package io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets.balances.bitcoinNative
+
+import io.novafoundation.nova.core.updater.SharedRequestsBuilder
+import io.novafoundation.nova.feature_account_api.domain.model.MetaAccount
+import io.novafoundation.nova.feature_wallet_api.data.cache.AssetCache
+import io.novafoundation.nova.feature_wallet_api.data.cache.updateNonLockableAsset
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.assets.balances.AssetBalance
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.assets.balances.BalanceSyncUpdate
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.assets.balances.model.ChainAssetBalance
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.assets.balances.model.TransferableBalanceUpdatePoint
+import io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin.BitcoinApi
+import io.novafoundation.nova.runtime.ext.addressOf
+import io.novafoundation.nova.runtime.ext.requireMempoolSpaceBaseUrl
+import io.novafoundation.nova.runtime.multiNetwork.chain.model.Chain
+import io.novasama.substrate_sdk_android.runtime.AccountId
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.emptyFlow
+import kotlinx.coroutines.flow.map
+import java.math.BigInteger
+
+/**
+ * Native BTC balance on a Bitcoin-based chain. Read-only (Phase 4): fetches via a mempool.space-style REST API
+ * and polls for updates, since that API has no push/subscription mechanism. No transfer/history support here -
+ * see `BitcoinAssetsModule` for how this is paired with `UnsupportedAssetTransfers`/`UnsupportedAssetHistory`.
+ */
+class BitcoinNativeAssetBalance(
+    private val assetCache: AssetCache,
+    private val bitcoinApi: BitcoinApi,
+) : AssetBalance {
+
+    override suspend fun startSyncingBalanceLocks(
+        metaAccount: MetaAccount,
+        chain: Chain,
+        chainAsset: Chain.Asset,
+        accountId: AccountId,
+        subscriptionBuilder: SharedRequestsBuilder
+    ): Flow<*> {
+        // Bitcoin native balance does not support locks
+        return emptyFlow<Nothing>()
+    }
+
+    override fun isSelfSufficient(chainAsset: Chain.Asset): Boolean {
+        return true
+    }
+
+    override suspend fun existentialDeposit(chainAsset: Chain.Asset): BigInteger {
+        // Bitcoin does not have an existential deposit concept (UTXO dust limit is enforced at the transfer level, not here)
+        return BigInteger.ZERO
+    }
+
+    override suspend fun queryAccountBalance(chain: Chain, chainAsset: Chain.Asset, accountId: AccountId): ChainAssetBalance {
+        val balance = bitcoinApi.fetchNativeBalance(chain.requireMempoolSpaceBaseUrl(), chain.addressOf(accountId))
+
+        return ChainAssetBalance.fromFree(chainAsset, balance)
+    }
+
+    override suspend fun subscribeAccountBalanceUpdatePoint(
+        chain: Chain,
+        chainAsset: Chain.Asset,
+        accountId: AccountId,
+    ): Flow<TransferableBalanceUpdatePoint> {
+        // Not on the critical sync path (mirrors TronNativeAssetBalance/EvmNativeAssetBalance) - out of scope for Phase 4.
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun startSyncingBalance(
+        chain: Chain,
+        chainAsset: Chain.Asset,
+        metaAccount: MetaAccount,
+        accountId: AccountId,
+        subscriptionBuilder: SharedRequestsBuilder
+    ): Flow<BalanceSyncUpdate> {
+        val baseUrl = chain.requireMempoolSpaceBaseUrl()
+        val address = chain.addressOf(accountId)
+
+        return pollingBalanceFlow { bitcoinApi.fetchNativeBalance(baseUrl, address) }
+            .map { balance ->
+                assetCache.updateNonLockableAsset(metaAccount.id, chainAsset, balance)
+
+                BalanceSyncUpdate.NoCause
+            }
+    }
+}
@@ -22,6 +22,7 @@ import io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets
        EvmNativeAssetsModule::class,
        EquilibriumAssetsModule::class,
        TronAssetsModule::class,
+        BitcoinAssetsModule::class,
        UnsupportedAssetsModule::class
    ]
 )
@@ -38,6 +39,7 @@ class AssetsModule {
        @EquilibriumAsset equilibrium: Lazy<AssetSource>,
        @TronNativeAssets tronNative: Lazy<AssetSource>,
        @Trc20Assets trc20: Lazy<AssetSource>,
+        @BitcoinNativeAssets bitcoinNative: Lazy<AssetSource>,
        @UnsupportedAssets unsupported: AssetSource,

        nativeAssetEventDetector: NativeAssetEventDetector,
@@ -53,6 +55,7 @@ class AssetsModule {
        equilibriumAssetSource = equilibrium,
        tronNativeSource = tronNative,
        trc20Source = trc20,
+        bitcoinNativeSource = bitcoinNative,
        unsupportedBalanceSource = unsupported,

        nativeAssetEventDetector = nativeAssetEventDetector,
@@ -0,0 +1,57 @@
+package io.novafoundation.nova.feature_wallet_impl.di.modules
+
+import dagger.Module
+import dagger.Provides
+import io.novafoundation.nova.common.data.network.NetworkApiCreator
+import io.novafoundation.nova.common.di.scope.FeatureScope
+import io.novafoundation.nova.feature_wallet_api.data.cache.AssetCache
+import io.novafoundation.nova.feature_wallet_api.data.network.blockhain.assets.AssetSource
+import io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin.BitcoinApi
+import io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin.RealBitcoinApi
+import io.novafoundation.nova.feature_wallet_impl.data.network.bitcoin.RetrofitBitcoinApi
+import io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets.StaticAssetSource
+import io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets.balances.bitcoinNative.BitcoinNativeAssetBalance
+import io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets.history.UnsupportedAssetHistory
+import io.novafoundation.nova.feature_wallet_impl.data.network.blockchain.assets.transfers.UnsupportedAssetTransfers
+import javax.inject.Qualifier
+
+@Qualifier
+annotation class BitcoinNativeAssets
+
+/**
+ * Bitcoin support - Phase 4, read-only.
+ *
+ * Only `balance` is implemented for real; `transfers`/`history` reuse the same `Unsupported*` stubs the rest of
+ * the app uses for asset types with no send/history support yet (see `TronAssetsModule` for the identical
+ * Phase-1 precedent this mirrors). Send support is separate, later work.
+ */
+@Module
+class BitcoinAssetsModule {
+
+    @Provides
+    @FeatureScope
+    fun provideRetrofitBitcoinApi(
+        networkApiCreator: NetworkApiCreator
+    ): RetrofitBitcoinApi = networkApiCreator.create(RetrofitBitcoinApi::class.java)
+
+    @Provides
+    @FeatureScope
+    fun provideBitcoinApi(retrofitBitcoinApi: RetrofitBitcoinApi): BitcoinApi = RealBitcoinApi(retrofitBitcoinApi)
+
+    @Provides
+    @FeatureScope
+    fun provideBitcoinNativeBalance(assetCache: AssetCache, bitcoinApi: BitcoinApi) = BitcoinNativeAssetBalance(assetCache, bitcoinApi)
+
+    @Provides
+    @BitcoinNativeAssets
+    @FeatureScope
+    fun provideBitcoinNativeAssetSource(
+        bitcoinNativeAssetBalance: BitcoinNativeAssetBalance,
+        unsupportedAssetTransfers: UnsupportedAssetTransfers,
+        unsupportedAssetHistory: UnsupportedAssetHistory,
+    ): AssetSource = StaticAssetSource(
+        transfers = unsupportedAssetTransfers,
+        balance = bitcoinNativeAssetBalance,
+        history = unsupportedAssetHistory
+    )
+}