Merge branch 'fix_dojo_fees_api' into 'develop'

return a 0 feerate if bitcoind doesn't return an estimate

See merge request dojo/samourai-dojo!189

lib/bitcoind-rpc/fees.js

@@ -56,10 +56,10 @@ class Fees {
     await util.seriesCall(this.targets, async tgt => {
       try {
         const level = await this.rpcClient.cmd('estimatesmartfee', tgt, this.feeType)
-        this.fees[tgt] = Math.round(level.feerate * 1e5)
+        this.fees[tgt] = (level.errors && level.errors.length > 0) ? 0 : Math.round(level.feerate * 1e5)
       } catch(e) {
         Logger.error(e, 'Bitcoind RPC : Fees.refresh()')
-        delete this.fees[tgt]
+        this.fees[tgt] = 0
       }
     })