gasnow gas price orace

README.md

@@ -8,10 +8,11 @@ Current offchain list:
 - https://gas-oracle.zoltu.io/
 - https://www.etherchain.org/api/gasPriceOracle
 - https://gasprice.poa.network/
+- https://www.gasnow.org/api/v3/gas/price
 
 Current onchain list:
 
-- [chainlink](https://etherscan.io/address/0xA417221ef64b1549575C977764E651c9FAB50141)
+- [chainlink](https://etherscan.io/address/0x169e633a2d1e6c10dd91238ba11c4a708dfef37c#readContract)
 
 ## Installation
 

src/config.ts

@@ -8,6 +8,7 @@ const ethgasstation: OffChainOracle = {
   standardPropertyName: 'average',
   lowPropertyName: 'safeLow',
   denominator: 10,
+  additionalDataProperty: null,
 };
 
 const zoltu: OffChainOracle = {
@@ -18,6 +19,7 @@ const zoltu: OffChainOracle = {
   standardPropertyName: 'percentile_60',
   lowPropertyName: 'percentile_30',
   denominator: 1,
+  additionalDataProperty: null,
 };
 
 const etherchain: OffChainOracle = {
@@ -28,6 +30,7 @@ const etherchain: OffChainOracle = {
   standardPropertyName: 'standard',
   lowPropertyName: 'safeLow',
   denominator: 1,
+  additionalDataProperty: null,
 };
 
 const poa: OffChainOracle = {
@@ -38,6 +41,18 @@ const poa: OffChainOracle = {
   standardPropertyName: 'standard',
   lowPropertyName: 'slow',
   denominator: 1,
+  additionalDataProperty: null,
+};
+
+const gasNow: OffChainOracle = {
+  name: 'gasNow',
+  url: 'https://www.gasnow.org/api/v3/gas/price?utm_source=gas-price-oracle',
+  instantPropertyName: 'rapid',
+  fastPropertyName: 'fast',
+  standardPropertyName: 'standard',
+  lowPropertyName: 'slow',
+  denominator: 1e9,
+  additionalDataProperty: 'data',
 };
 
 const chainlink: OnChainOracle = {
@@ -49,6 +64,7 @@ const chainlink: OnChainOracle = {
 
 export const offChainOracles: { [key: string]: OffChainOracle } = {
   ethgasstation,
+  gasNow,
   poa,
   etherchain,
   zoltu,

src/index.ts

@@ -27,10 +27,11 @@ export class GasPriceOracle {
       standardPropertyName,
       lowPropertyName,
       denominator,
+      additionalDataProperty,
     } = oracle;
     const response = await axios.get(url, { timeout: this.configuration.timeout });
     if (response.status === 200) {
-      const gas = response.data;
+      const gas = additionalDataProperty ? response.data[additionalDataProperty] : response.data;
       if (Number(gas[fastPropertyName]) === 0) {
         throw new Error(`${name} oracle provides corrupted values`);
       }

src/types.ts

@@ -6,6 +6,7 @@ export type OffChainOracle = {
   standardPropertyName: string;
   lowPropertyName: string;
   denominator: number;
+  additionalDataProperty: string | null;
 };
 
 export type OnChainOracle = {