Feat/balancer connector

package.json

@@ -23,6 +23,7 @@
     "test:scripts": "jest -i --verbose ./test-scripts/*.test.ts"
   },
   "dependencies": {
+    "@balancer-labs/sdk": "^1.1.2",
     "@cosmjs/proto-signing": "^0.28.10",
     "@cosmjs/stargate": "^0.28.13",
     "@crocswap/sdk": "^2.4.5",

src/chains/ethereum/ethereum.ts

@@ -13,6 +13,7 @@ import { Perp } from '../../connectors/perp/perp';
 import { SushiswapConfig } from '../../connectors/sushiswap/sushiswap.config';
 import { OpenoceanConfig } from '../../connectors/openocean/openocean.config';
 import { ZigZagConfig } from '../../connectors/zigzag/zigzag.config';
+import { BalancerConfig } from '../../connectors/balancer/balancer.config';
 
 // MKR does not match the ERC20 perfectly so we need to use a separate ABI.
 const MKR_ADDRESS = '0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2';
@@ -196,6 +197,11 @@ export class Ethereum extends EthereumBase implements Ethereumish {
       spender = OpenoceanConfig.config.routerAddress('ethereum', this._chain);
     } else if (reqSpender === 'zigzag') {
       spender = ZigZagConfig.config.contractAddress(this._chain);
+    } else if (reqSpender === 'balancer') {
+      spender = BalancerConfig.config.balancerV2VaultAddress(
+        this.chainName,
+        this._chain
+      );
     } else {
       spender = reqSpender;
     }

src/chains/ethereum/ethereum.validators.ts

@@ -64,6 +64,7 @@ export const validateSpender: Validator = mkValidator(
       val === 'pancakeswap' ||
       val === 'xsswap' ||
       val === 'zigzag' ||
+      val === 'balancer' ||
       isAddress(val))
 );
 

src/chains/polygon/polygon.ts

@@ -10,6 +10,7 @@ import { UniswapConfig } from '../../connectors/uniswap/uniswap.config';
 import { Ethereumish } from '../../services/common-interfaces';
 import { ConfigManagerV2 } from '../../services/config-manager-v2';
 import { OpenoceanConfig } from '../../connectors/openocean/openocean.config';
+import { BalancerConfig } from '../../connectors/balancer/balancer.config';
 
 export class Polygon extends EthereumBase implements Ethereumish {
   private static _instances: { [name: string]: Polygon };
@@ -83,6 +84,11 @@ export class Polygon extends EthereumBase implements Ethereumish {
       );
     } else if (reqSpender === 'openocean') {
       spender = OpenoceanConfig.config.routerAddress('polygon', this._chain);
+    } else if (reqSpender === 'balancer') {
+      spender = BalancerConfig.config.balancerV2VaultAddress(
+        this.chainName,
+        this._chain
+      );
     } else {
       spender = reqSpender;
     }

src/chains/polygon/polygon.validators.ts

@@ -27,6 +27,7 @@ export const validateSpender: Validator = mkValidator(
       val === 'sushi' ||
       val === 'quickswap' ||
       val === 'openocean' ||
+      val === 'balancer' ||
       isAddress(val))
 );
 

src/connectors/balancer/balancer.config.ts

@@ -0,0 +1,43 @@
+import { ConfigManagerV2 } from '../../services/config-manager-v2';
+import { AvailableNetworks } from '../../services/config-manager-types';
+
+export namespace BalancerConfig {
+  export interface NetworkConfig {
+    allowedSlippage: string;
+    gasLimitEstimate: number;
+    ttl: number;
+    maximumHops: number;
+    balancerV2VaultAddress: (chain: string, network: string) => string;
+    tradingTypes: Array<string>;
+    chainType: string;
+    availableNetworks: Array<AvailableNetworks>;
+  }
+
+  export const config: NetworkConfig = {
+    allowedSlippage: ConfigManagerV2.getInstance().get(
+      'balancer.allowedSlippage'
+    ),
+    gasLimitEstimate: ConfigManagerV2.getInstance().get(
+      'balancer.gasLimitEstimate'
+    ),
+    ttl: ConfigManagerV2.getInstance().get('balancer.ttl'),
+    maximumHops: ConfigManagerV2.getInstance().get('balancer.maximumHops'),
+    balancerV2VaultAddress: (chain: string, network: string) =>
+      ConfigManagerV2.getInstance().get(
+        'balancer.contractAddresses.' +
+          chain +
+          '.' +
+          network +
+          '.balancerV2VaultAddress'
+      ),
+    tradingTypes: ['AMM'],
+    chainType: 'EVM',
+    availableNetworks: [
+      {
+        chain: 'ethereum',
+        networks: ['mainnet', 'goerli', 'arbitrum_one'],
+      },
+      { chain: 'polygon', networks: ['mainnet', 'mumbai'] },
+    ],
+  };
+}