ECC/zcash-swift-wallet-sdk#298 ECC/zcash-swift-wallet-sdk#298 Make BalanceTests pass ECC/zcash-swift-wallet-sdk#1286 ECC/zcash-swift-wallet-sdk#1286 Add structured error types for errors received across the FFI boundary. ECC/zcash-swift-wallet-sdk#1349 ECC/zcash-swift-wallet-sdk#1349 Only request subtree roots that the wallet needs ECC/zcash-swift-wallet-sdk#1508 ECC/zcash-swift-wallet-sdk#1508 Refactor the SDK to not assume that the seed is available without user interaction ECC/zcash-light-client-ffi#138 ECC/zcash-light-client-ffi#138 Expose transaction history API ECC/zashi#59 ECC/zashi#59 Support multi-account functionality.