feat: add Mantle support

[Sekhmet]

Summary

This PR adds Mantle support. Currently it uses sx-api as API.

Closes: https://github.com/snapshot-labs/workflow/issues/449

How to test

1. Apply patch below to run local mana (make sure you have funds in your relayer Mana account for fees).
2. Run yarn dev.
3. You can create Mantle space, propose, vote etc.

Tested

• Create space
• Create proposal
• Vote
• Execute proposal (contract execution, other options are unavailable because of missing OpenSea/Alchemy support).

diff --git a/apps/ui/.env b/apps/ui/.env
index c136c279..a3104101 100644
--- a/apps/ui/.env
+++ b/apps/ui/.env
@@ -1,6 +1,6 @@
 VITE_ENABLED_NETWORKS=
 VITE_METADATA_NETWORK=
-VITE_MANA_URL=https://mana.box
+VITE_MANA_URL=http://localhost:3001
 VITE_HIGHLIGHT_URL=https://testnet.highlight.red
 VITE_IPFS_GATEWAY=ipfs.snapshot.box
 VITE_INFURA_API_KEY=46a5dd9727bf48d4a132672d3f376146
diff --git a/package.json b/package.json
index a7cad219..598cf209 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "url": "[email protected]:snapshot-labs/sx-monorepo.git"
   },
   "scripts": {
-    "dev": "turbo run dev --filter=!mana --filter=!api --filter=!api-subgraph",
+    "dev": "turbo run dev  --filter=!api --filter=!api-subgraph",
     "dev:full": "./scripts/dev-full.sh",
     "build": "turbo run build",
     "test": "turbo run test",

[bonustrack]

Works well! I'm able to cast vote under 1 cent, propose for 2 cents. Can you just change the network id to "mnt" instead of "mantle" this is what Safe is using too, which is a standard they started https://eips.ethereum.org/EIPS/eip-3770.

[Sekhmet]

I tried to follow that when integrating. EIP-3770 says shortName is mandatory and MUST be a valid chain short name from https://github.com/ethereum-lists/chains.

For Mantle shortName is "mantle" in this repo: https://github.com/ethereum-lists/chains/blob/8f6656ec0ba945534d5c3914863bdc5e5a080946/_data/chains/eip155-5000.json#L17

Maybe we should ask Mantle team what is their preferred way and ideally it should be reflected in chains repo.