[#47] Add Makefile helpers for wallet management

Signed-off-by: Vitaliy Potyarkin <v.potyarkin@yadro.com>

Makefile

@@ -92,6 +92,27 @@ enable-oracle:
 tick.epoch:
 	@docker exec aio /usr/bin/frostfs-adm --config /config/frostfs-adm.yml morph force-new-epoch
 
+# Create new wallet
+WALLET?=wallets/wallet1.json
+.PHONY: wallet
+wallet:
+	@! test -f "$(WALLET)" || { echo "File exists: $(WALLET)"; exit 1; }
+	@docker exec -it aio /usr/bin/neo-go wallet init -a -w "$(WALLET)"
+
+# Refill GAS in arbitrary WALLET (must be under wallets/ directory)
+GAS?=50.0
+.PHONY: refill
+refill:
+	@docker exec aio /usr/bin/frostfs-adm --config /config/frostfs-adm.yml \
+		morph refill-gas --storage-wallet=/$(WALLET) --gas=$(GAS)
+	@$(MAKE) --no-print-directory balance
+
+# Show wallet balance
+.PHONY: balance
+balance:
+	@echo "Balance for $(WALLET)"
+	@docker exec aio /usr/bin/neo-go wallet nep17 balance -r http://localhost:30333 -w "$(WALLET)"
+
 # Show current version
 version:
 	@echo $(VERSION)

README.md

@@ -288,6 +288,35 @@ If everything is rigth, the stdout will show a pretty-printed contents of the wa
 wallet successfully created, file location is /wallets/new-wallet.json
 ```
 
+You can use `make wallet WALLET=wallets/new-wallet.json`
+to execute the steps listed above a little faster.
+
+
+### Transfering GAS tokens to wallet
+
+To add GAS to a new wallet use `make refill`
+
+```console
+$ make refill GAS=12.3 WALLET=wallets/new-wallet.json
+Waiting for transactions to persist...
+Balance for wallets/new-wallet.json
+Account NgB6jnyVsMg6E3gQQLXoccZ3JBMLsgiut3
+GAS: GasToken (d2a4cff31913016155e38e474a2c06d08be276cf)
+        Amount : 12.3
+        Updated: 25069
+```
+
+### Checking wallet balance
+
+```console
+$ make balance WALLET=wallets/new-wallet.json
+Balance for wallets/new-wallet.json
+Account NgB6jnyVsMg6E3gQQLXoccZ3JBMLsgiut3
+GAS: GasToken (d2a4cff31913016155e38e474a2c06d08be276cf)
+        Amount : 12.3
+        Updated: 25069
+```
+
 
 ## frostfs-cli interface