add fara staking strategy (snapshot-labs#57)

src/strategies/faraland-staking/examples.json

@@ -0,0 +1,17 @@
+[
+  {
+    "name": "Faraland stake query",
+    "strategy": {
+      "name": "faraland-staking",
+      "params": {
+        "address": "0x3057A6EF2aCf803371315380d21D0193471E3EF8",
+        "symbol": "FARA"
+      }
+    },
+    "network": "56",
+    "addresses": [
+      "0x3f105F78359ad80562B4c34296a87b8e66c584C5"
+    ],
+    "snapshot": 10913859
+  }
+]

src/strategies/faraland-staking/index.ts

@@ -0,0 +1,51 @@
+import { getAddress } from '@ethersproject/address';
+import { subgraphRequest } from '../../utils';
+
+const FLASHSTAKE_SUBGRAPH_URL = {
+  '1': 'https://queries-graphnode.faraland.io/subgraphs/name/edwardevans094/farastore-v12',
+  '56': 'https://queries-graphnode.faraland.io/subgraphs/name/edwardevans094/farastore-v12'
+};
+
+export const author = 'edwardEvans094';
+export const version = '0.1.0';
+
+export async function strategy(
+  _space,
+  network,
+  _provider,
+  addresses,
+  options,
+  snapshot
+) {
+  const params = {
+    users: {
+      __args: {
+        where: {
+          id_in: addresses.map((address) => address.toLowerCase())
+        },
+        first: 1000
+      },
+      id: true,
+      totalStaked: true
+    }
+  };
+
+  if (snapshot !== 'latest') {
+    // @ts-ignore
+    params.users.__args.block = { number: snapshot };
+  }
+  const result = await subgraphRequest(
+    FLASHSTAKE_SUBGRAPH_URL[network],
+    params
+  );
+
+  const score = {};
+  if (result && result.users) {
+    result.users.map((_data) => {
+      const address = getAddress(_data.id);
+      score[address] = Number(_data.totalStaked);
+    });
+  }
+
+  return score || {};
+}

src/strategies/index.ts

@@ -30,6 +30,7 @@ import * as yearnVault from './yearn-vault';
 import * as fraxFinance from './frax-finance';
 import * as moloch from './moloch';
 import * as uniswap from './uniswap';
+import * as faralandStaking from './faraland-staking';
 import * as flashstake from './flashstake';
 import * as pancake from './pancake';
 import * as synthetix from './synthetix';
@@ -186,6 +187,7 @@ const strategies = {
   masterchef,
   sushiswap,
   uniswap,
+  'faraland-staking': faralandStaking,
   flashstake,
   pancake,
   synthetix,