Box the wallet: Add multiple keyman maps and loops

Add wallet logic for dealing with multiple ScriptPubKeyMan instances. This
doesn't change current behavior because there is still only a single
LegacyScriptPubKeyMan. But in the future the new logic will be used to support
descriptor wallets.

1 files changed, 15 insertions, 1 deletions

diff --git a/src/wallet/scriptpubkeyman.h b/src/wallet/scriptpubkeyman.h
index edb147a0b4..e44026f647 100644
--- a/src/wallet/scriptpubkeyman.h
+++ b/src/wallet/scriptpubkeyman.h
@@ -196,8 +196,16 @@ public:
 
     virtual int64_t GetTimeFirstKey() const { return 0; }
 
-    //! Return address metadata
     virtual const CKeyMetadata* GetMetadata(const CTxDestination& dest) const { return nullptr; }
+
+    virtual const SigningProvider* GetSigningProvider(const CScript& script) const { return nullptr; }
+
+    /** Whether this ScriptPubKeyMan can provide a SigningProvider (via GetSigningProvider) that, combined with
+      * sigdata, can produce a valid signature.
+      */
+    virtual bool CanProvide(const CScript& script, SignatureData& sigdata) { return false; }
+
+    virtual uint256 GetID() const { return uint256(); }
 };
 
 class LegacyScriptPubKeyMan : public ScriptPubKeyMan, public FillableSigningProvider
@@ -319,6 +327,12 @@ public:
 
     bool CanGetAddresses(bool internal = false) override;
 
+    const SigningProvider* GetSigningProvider(const CScript& script) const override;
+
+    bool CanProvide(const CScript& script, SignatureData& sigdata) override;
+
+    uint256 GetID() const override;
+
     // Map from Key ID to key metadata.
     std::map<CKeyID, CKeyMetadata> mapKeyMetadata GUARDED_BY(cs_KeyStore);