[TX] Fix undelegation & claim rewards addresses

Ivanb/notifications (#78)

* [TX] add empty asset validation

* Revert "[TX] add empty asset validation"

This reverts commit 66e99ccc

* [TX] fix undelegation & claim rewards addresses

* [TX] fix tests

UTXO adjustments

UTXO adjustments (#77)

* [TX] add empty asset validation

* Revert "[TX] add empty asset validation"

This reverts commit 66e99ccc

* [TX] return only user's address for delegation related txs

Transactions validation

Tx metadata validation (#76)

* [TX] add metadata validation

* [TX] add empty asset validation

[TX] return all utxo addresses

v0.1.32

[TX] return utxo addresses

v0.1.31

[Pusher] split Transaction Notificaitons onto old and new versions

v0.1.30

Fix thorchain decimals from 18 => 8

[TX] add tests and adjust marshalling, api response model and fix stake txs direction

v0.1.29

[TX] add tests and adjust marshalling, api response model and fix sta…

Implement new txs sorting & add helper func

v0.1.28

[TX] implement sorting & add helper func

[TX] change tx_fee to fee

v0.1.27

[TX] change tx_fee to fee

[Collections] Extend collection type with preview_image_url and original_source_url

v0.1.26

[Collections] Extend collection type with preview_image_url and origi…