Added function descriptions

pkg/tbtc/chain.go

@@ -245,6 +245,8 @@ type WalletClosedEvent struct {
 // BridgeChain defines the subset of the TBTC chain interface that pertains
 // specifically to the tBTC Bridge operations.
 type BridgeChain interface {
+	// IsWalletRegistered checks whether the given wallet is registered in the
+	// ECDSA wallet registry.
 	IsWalletRegistered(EcdsaWalletID [32]byte) (bool, error)
 
 	// GetWallet gets the on-chain data for the given wallet. Returns an error

pkg/tbtc/node.go

@@ -1089,6 +1089,7 @@ func processCoordinationResult(node *node, result *coordinationResult) {
 	}
 }
 
+// archiveClosedWallets archives closed or terminated wallets.
 func (n *node) archiveClosedWallets() error {
 	getClosedWallets := func(walletPublicKeyHashes [][20]byte) (
 		closedWallets [][20]byte,

pkg/tbtc/registry.go

@@ -156,6 +156,9 @@ func (wr *walletRegistry) getWalletByPublicKeyHash(
 	return wallet{}, false
 }
 
+// archiveWallet archives the wallet with the given public key hash. The wallet
+// data is removed from the wallet cache and the entire wallet storage directory
+// is moved to the archive directory.
 func (wr *walletRegistry) archiveWallet(
 	walletPublicKeyHash [20]byte,
 ) error {
@@ -233,6 +236,8 @@ func (ws *walletStorage) saveSigner(signer *signer) error {
 	return nil
 }
 
+// archiveWallet archives the given wallet data in the underlying persistence
+// layer of the walletStorage.
 func (ws *walletStorage) archiveWallet(walletStoragePath string) error {
 	err := ws.persistence.Archive(walletStoragePath)
 	if err != nil {