Contract: Sending coreum originated tokens back from XRPL to Coreum (#49

)

# Description
- Implemented sending of coreum originated tokens (previously bridged)
from XRPL back to the Coreum.
- Changed the Coreum Tokens Map into an Indexed Map to also be able to
query Coreum tokens by XRPL currency ( this is needed for the relayers
(so that they can obtain the token information) and also made possible
to remove the other map we were using for currencies and use the
secondary index instead).

Makefile

@@ -29,7 +29,7 @@ build-contract:
 	docker run --user $(id -u):$(id -g) --rm -v $(CONTRACT_DIR):/code \
       --mount type=volume,source="coreumbridge_xrpl_cache",target=/code/target \
       --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
-       cosmwasm/optimizer:0.15.0-beta.1
+       cosmwasm/optimizer:0.15.0
 	mkdir -p $(BUILD_DIR)
 	cp $(CONTRACT_DIR)/artifacts/coreumbridge_xrpl.wasm $(BUILD_DIR)/coreumbridge_xrpl.wasm
 

README.md

@@ -1,4 +1,4 @@
-# Coreumbrdige XRPL
+# Coreumbridge XRPL
 
 Two-way Coreum XRPL bridge.