[occ-stake-of] New strategy for OCC token stake balance (snapshot-lab…

…s#72)

* Addition of OCC stake balance strategy

* Field name consistency

src/strategies/index.ts

@@ -150,6 +150,7 @@ import * as flexaCapacityStaking from './flexa-capacity-staking';
 import * as sunriseGamingUniv2Lp from './sunrisegaming-univ2-lp';
 import * as sunriseGamingStaking from './sunrisegaming-staking';
 import * as singleStakingPoolsBalanceOf from './single-staking-pools-balanceof'
+import * as occStakeOf from './occ-stake-of'
 
 const strategies = {
   coordinape,
@@ -301,7 +302,8 @@ const strategies = {
   'flexa-capacity-staking': flexaCapacityStaking,
   'sunrisegaming-univ2-lp': sunriseGamingUniv2Lp,
   'sunrisegaming-staking': sunriseGamingStaking,
-  'single-staking-pools-balanceof': singleStakingPoolsBalanceOf
+  'single-staking-pools-balanceof': singleStakingPoolsBalanceOf,
+  'occ-stake-of': occStakeOf
 };
 
 Object.keys(strategies).forEach(function (strategyName) {

src/strategies/occ-stake-of/README.md

@@ -0,0 +1,15 @@
+# occ-stake-of
+
+This is the OCC staking strategy, it returns the OCC staking balances of the voters.
+
+Here is an example of parameters:
+
+```json
+{
+  "stakingContractAddress": [
+    "0xeBC86Fb12ab0fFaC6CBcaFCe2f049BfE7eFAda0D"
+  ],
+  "symbol": "OCC",
+  "decimals": 18
+}
+```

src/strategies/occ-stake-of/examples.json

@@ -0,0 +1,28 @@
+[
+  {
+    "name": "Example query",
+    "strategy": {
+      "name": "occ-stake-of",
+      "params": {
+        "stakingContractAddress": [
+          "0xeBC86Fb12ab0fFaC6CBcaFCe2f049BfE7eFAda0D"
+        ],
+        "symbol": "OCC",
+        "decimals": 18
+      }
+    },
+    "network": "1",
+    "addresses": [
+      "0xa95f8f54dc55281852b5c972e4874264c7b5d3de",
+      "0x77752aE2Cb765BDd09568E69B740a2276187F052",
+      "0xd3aecf9e0856822bd320873e905ae9f78a2977e7",
+      "0x2C2ADD1C863551A0644876be227604C8E458dD7e",
+      "0x8af630f68dd02c589b9449158455735814b452a3",
+      "0x252e2e0e4cc5bd7391acb47634fb6bb382d08586",
+      "0x4bf455074e67848dc7e1c55b45a32aafca2e9c9c",
+      "0xb623964e5761C1b04A4a46b9aE8D1809dEFa7efB"
+    ],
+    "snapshot": 12381658
+  }
+]
+

src/strategies/occ-stake-of/index.ts

@@ -0,0 +1,36 @@
+import { BigNumberish } from '@ethersproject/bignumber';
+import { formatUnits } from '@ethersproject/units';
+import { Multicaller } from '../../utils';
+
+export const author = 'OccamFi';
+export const version = '0.1.0';
+
+const abi = [
+  'function getStake(address user) public view returns (uint stake)'
+];
+
+export async function strategy(
+  space,
+  network,
+  provider,
+  addresses,
+  options,
+  snapshot
+): Promise<Record<string, number>> {
+  const blockTag = typeof snapshot === 'number' ? snapshot : 'latest';
+
+  const multi = new Multicaller(network, provider, abi, { blockTag });
+
+  addresses.forEach((address) =>
+    multi.call(address, options.stakingContractAddress[0], 'getStake', [address])
+  );
+
+  const result: Record<string, BigNumberish> = await multi.execute();
+
+  return Object.fromEntries(
+    Object.entries(result).map(([address, stake]) => [
+      address,
+      parseFloat(formatUnits(stake, options.decimals))
+    ])
+  );
+}