imp(erc20): Add reference to EIP-7528 (native asset address) to defau…

…lt ERC-20 params and use it for example chain (#57)

.clconfig.json

@@ -24,10 +24,10 @@
     "types"
   ],
   "change_types": {
-    "API Breaking": "api\\s*breaking",
-    "Bug Fixes": "bug\\s*fixes",
-    "Improvements": "improvements",
-    "State Machine Breaking": "state\\s*machine\\s*breaking"
+    "API Breaking": "feat-api",
+    "Bug Fixes": "fix",
+    "Improvements": "imp",
+    "State Machine Breaking": "feat-smb"
   },
   "expected_spellings": {
     "ABI": "abi",

CHANGELOG.md

@@ -9,6 +9,7 @@ This changelog was created using the `clu` binary
 
 ### Improvements
 
+- (erc20) [#57](https://github.com/evmos/os/pull/57) Reference EIP-7528 (native asset address) in default ERC-20 params.
 - (all) [#60](https://github.com/evmos/os/pull/60) Apply latest changes from Evmos repo (f943af3b to b72a32d76).
 - (cli) [#55](https://github.com/evmos/os/pull/55) Add missing list key types subcommand.
 - (cli) [#54](https://github.com/evmos/os/pull/54) Align debug CLI commands with Cosmos SDK plus other minor clean up.

example_chain/local_node.sh

@@ -134,6 +134,10 @@ if [[ $overwrite == "y" || $overwrite == "Y" ]]; then
 	# Enable precompiles in EVM params
 	jq '.app_state["evm"]["params"]["active_static_precompiles"]=["0x0000000000000000000000000000000000000100","0x0000000000000000000000000000000000000400","0x0000000000000000000000000000000000000800","0x0000000000000000000000000000000000000801","0x0000000000000000000000000000000000000802","0x0000000000000000000000000000000000000803","0x0000000000000000000000000000000000000804","0x0000000000000000000000000000000000000805"]' "$GENESIS" >"$TMP_GENESIS" && mv "$TMP_GENESIS" "$GENESIS"
 
+	# Enable native denomination as a token pair for STRv2
+	jq '.app_state.erc20.params.native_precompiles=["0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE"]' "$GENESIS" >"$TMP_GENESIS" && mv "$TMP_GENESIS" "$GENESIS"
+	jq '.app_state.erc20.token_pairs=[{contract_owner:1,erc20_address:"0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",denom:"aevmos",enabled:true}]' "$GENESIS" >"$TMP_GENESIS" && mv "$TMP_GENESIS" "$GENESIS"
+
 	# Set gas limit in genesis
 	jq '.consensus_params["block"]["max_gas"]="10000000"' "$GENESIS" >"$TMP_GENESIS" && mv "$TMP_GENESIS" "$GENESIS"
 

x/erc20/types/params.go

@@ -20,6 +20,11 @@ var (
 )
 
 var (
+	// NOTE: We strongly recommend to use the canonical address for the ERC-20 representation
+	// of the chain's native denomination as defined by
+	// [ERC-7528](https://eips.ethereum.org/EIPS/eip-7528).
+	//
+	// 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
 	DefaultNativePrecompiles  []string
 	DefaultDynamicPrecompiles []string
 )