add simapp implementation as an example chain

encoding/config.go

@@ -1,5 +1,6 @@
 // Copyright Tharsis Labs Ltd.(Evmos)
 // SPDX-License-Identifier:ENCL-1.0(https://github.com/evmos/evmos/blob/main/LICENSE)
+
 package encoding
 
 import (

example_chain/Makefile

@@ -0,0 +1,103 @@
+#!/usr/bin/make -f
+
+VERSION ?= $(shell echo $(shell git describe --tags --always) | sed 's/^v//')
+TMVERSION := $(shell go list -m github.com/cometbft/cometbft | sed 's:.* ::')
+COMMIT := $(shell git log -1 --format='%H')
+BINDIR ?= $(GOPATH)/bin
+EXAMPLE_BINARY = osd
+BUILDDIR ?= $(CURDIR)/build
+
+export GO111MODULE = on
+
+# Default target executed when no arguments are given to make.
+default_target: all
+
+.PHONY: default_target
+
+# process build tags
+build_tags = netgo
+
+ifeq (cleveldb,$(findstring cleveldb,$(COSMOS_BUILD_OPTIONS)))
+  build_tags += gcc
+endif
+build_tags += $(BUILD_TAGS)
+build_tags := $(strip $(build_tags))
+
+# process linker flags
+
+ldflags = -X github.com/cosmos/cosmos-sdk/version.Name=os \
+          -X github.com/cosmos/cosmos-sdk/version.AppName=$(EXAMPLE_BINARY) \
+          -X github.com/cosmos/cosmos-sdk/version.Version=$(VERSION) \
+          -X github.com/cosmos/cosmos-sdk/version.Commit=$(COMMIT) \
+          -X github.com/cometbft/cometbft/version.TMCoreSemVer=$(TMVERSION)
+
+# DB backend selection
+ifeq (cleveldb,$(findstring cleveldb,$(COSMOS_BUILD_OPTIONS)))
+  ldflags += -X github.com/cosmos/cosmos-sdk/types.DBBackend=cleveldb
+endif
+
+# add build tags to linker flags
+whitespace := $(subst ,, )
+comma := ,
+build_tags_comma_sep := $(subst $(whitespace),$(comma),$(build_tags))
+ldflags += -X "github.com/cosmos/cosmos-sdk/version.BuildTags=$(build_tags_comma_sep)"
+
+ifeq (,$(findstring nostrip,$(COSMOS_BUILD_OPTIONS)))
+  ldflags += -w -s
+endif
+ldflags += $(LDFLAGS)
+ldflags := $(strip $(ldflags))
+
+BUILD_FLAGS := -tags "$(build_tags)" -ldflags '$(ldflags)'
+# check for nostrip option
+ifeq (,$(findstring nostrip,$(COSMOS_BUILD_OPTIONS)))
+  BUILD_FLAGS += -trimpath
+endif
+
+# check if no optimization option is passed
+# used for remote debugging
+ifneq (,$(findstring nooptimization,$(COSMOS_BUILD_OPTIONS)))
+  BUILD_FLAGS += -gcflags "all=-N -l"
+endif
+
+# # The below include contains the tools and runsim targets.
+# include contrib/devtools/Makefile
+
+###############################################################################
+###                                  Build                                  ###
+###############################################################################
+
+BUILD_TARGETS := build install
+
+build: BUILD_ARGS=-o $(BUILDDIR)/
+build-linux:
+	GOOS=linux GOARCH=amd64 $(MAKE) build
+
+$(BUILD_TARGETS): go.sum $(BUILDDIR)/
+	CGO_ENABLED="1" go $@ $(BUILD_FLAGS) $(BUILD_ARGS) ./...
+
+$(BUILDDIR)/:
+	mkdir -p $(BUILDDIR)/
+
+distclean: clean tools-clean
+
+clean:
+	rm -rf \
+    $(BUILDDIR)/ \
+    artifacts/ \
+    tmp-swagger-gen/
+
+all: build
+
+build-all: build lint test vulncheck
+
+.PHONY: distclean clean build-all
+
+###############################################################################
+###                          Tools & Dependencies                           ###
+###############################################################################
+
+go.sum: go.mod
+	echo "Ensure dependencies have not been modified ..." >&2
+	go mod verify
+	go mod tidy

example_chain/README.md

@@ -0,0 +1,56 @@
+# Example evmOS Chain
+
+This directory contains an example chain that uses the evmOS modules.
+It is based on the simapp implementation on the Cosmos SDK repository,
+which itself is a simplified version of a Cosmos SDK-based blockchain.
+
+This chain implementation is used to demonstrate the integration of evmOS
+as well as to provide a chain object for testing purposes within the repository.
+
+## Config
+
+By default, this chain has the following configuration:
+
+| Option              | Value          |
+|---------------------|----------------|
+| Binary              | `osd`          |
+| Chain ID            | `os_9005-1`    |
+| Denomination        | `aos`          |
+| EVM flavor          | permissionless |
+| Enabled Precompiles | all            |
+| Custom Opcodes      | -              |
+
+## Running The Chain
+
+To run the example, execute the local node script found within this repository:
+
+```bash
+./local_node.sh [FLAGS]
+```
+
+Available flags are:
+
+- `-y`: Overwrite previous database
+- `-n`: Do **not** overwrite previous database
+- `--no-install`: Skip installation of the binary
+
+## Available Cosmos SDK Modules
+
+As mentioned above, this exemplary chain implementation is a reduced version of `simapp`.
+Specifically, instead of offering access to all Cosmos SDK modules, it just includes the following:
+
+- `auth`
+- `authz`
+- `bank`
+- `capability`
+- `consensus`
+- `distribution`
+- `evidence`
+- `feegrant`
+- `genutil`
+- `gov`
+- `mint`
+- `params`
+- `slashing`
+- `staking`
+- `upgrade`