btc.rb in sibit-0.18.7

- old
+ new

@@ -81,11 +81,13 @@
     # The height of the block.
     def height(hash)
       json = Sibit::Json.new(http: @http, log: @log).get(
         URI("https://chain.api.btc.com/v3/block/#{hash}")
       )
-      h = json['data']['height']
+      data = json['data']
+      raise Sibit::Error, "The block #{hash} not found" if data.nil?
+      h = data['height']
       @log.info("The height of #{hash} is #{h}")
       h
     end
 
     # Get recommended fees, in satoshi per byte.
@@ -95,11 +97,13 @@
 
     # Gets the hash of the latest block.
     def latest
       uri = URI('https://chain.api.btc.com/v3/block/latest')
       json = Sibit::Json.new(http: @http, log: @log).get(uri)
-      hash = json['data']['hash']
+      data = json['data']
+      raise Sibit::Error, 'The latest block not found' if data.nil?
+      hash = data['hash']
       @log.info("The hash of the latest block is #{hash}")
       hash
     end
 
     # Fetch all unspent outputs per address.
@@ -107,11 +111,13 @@
       txns = []
       sources.each do |hash|
         json = Sibit::Json.new(http: @http, log: @log).get(
           URI("https://chain.api.btc.com/v3/address/#{hash}/unspent")
         )
-        json['data']['list'].each do |u|
+        data = json['data']
+        raise Sibit::Error, "The address #{hash} not found" if data.nil?
+        data['list'].each do |u|
           outs = Sibit::Json.new(http: @http, log: @log).get(
             URI("https://chain.api.btc.com/v3/tx/#{u['tx_hash']}?verbose=3")
           )['data']['outputs']
           outs.each_with_index do |o, i|
             next unless o['addresses'].include?(hash)
@@ -136,16 +142,18 @@
     # This method should fetch a Blockchain block and return as a hash.
     def block(hash)
       head = Sibit::Json.new(http: @http, log: @log).get(
         URI("https://chain.api.btc.com/v3/block/#{hash}")
       )
-      nxt = head['data']['next_block_hash']
+      data = head['data']
+      raise Sibit::Error, "The block #{hash} not found" if data.nil?
+      nxt = data['next_block_hash']
       nxt = nil if nxt == '0000000000000000000000000000000000000000000000000000000000000000'
       {
-        hash: head['data']['hash'],
-        orphan: head['data']['is_orphan'],
+        hash: data['hash'],
+        orphan: data['is_orphan'],
         next: nxt,
-        previous: head['data']['prev_block_hash'],
+        previous: data['prev_block_hash'],
         txns: txns(hash)
       }
     end
 
     private