feat: support erc20 swap

Makefile

@@ -43,7 +43,7 @@ distclean: clean
 ###                                Protobuf                                 ###
 ###############################################################################
 
-protoVer=0.11.2
+protoVer=0.13.0
 protoImageName=ghcr.io/cosmos/proto-builder:$(protoVer)
 protoImage=$(DOCKER) run --rm -v $(CURDIR):/workspace --workdir /workspace $(protoImageName)
 
@@ -120,3 +120,39 @@ format:
 
 benchmark:
 	@go test -mod=readonly -bench=. ./...
+
+
+
+###############################################################################
+###                        Compile Solidity Contracts                       ###
+###############################################################################
+
+CONTRACTS_DIR := contracts
+COMPILED_DIR := $(CONTRACTS_DIR)/compiled_contracts
+
+# Compile and format solidity contracts for the erc20 module. Also install
+# openzeppeling as the contracts are build on top of openzeppelin templates.
+contracts-compile: contracts-clean dep-install create-contracts-abi contracts-clean
+
+# Install openzeppelin solidity contracts
+dep-install:
+	@echo "Importing openzeppelin contracts..."
+	@cd $(CONTRACTS_DIR) && \
+	 npm install
+
+# Clean tmp files
+contracts-clean:
+	@rm -rf $(CONTRACTS_DIR)/node_modules
+
+# Compile, filter out and format contracts into the following format.
+# {
+# 	"abi": "[{\"inpu 			# JSON string
+# 	"bin": "60806040
+# 	"contractName": 			# filename without .sol
+# }
+create-contracts-abi:
+	solc --combined-json abi,bin --evm-version paris --include-path $(CONTRACTS_DIR)/node_modules --base-path ./contracts  ./contracts/Token.sol | jq '.contracts["Token.sol:Token"]' > $(COMPILED_DIR)/Token.json 
+
+###############################################################################
+###                           Miscellaneous Checks                          ###
+###############################################################################