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# File 'lib/vchain_client/blockcypher_blockchain_adapter.rb', line 23
def getTx(txid)
url = "https://api.blockcypher.com/v1/btc/main/txs/"
url += txid
url += "?token="+ @api_token
url += "&rand="+ Random.rand(0...999999).to_s
if @log.debug?
@log.debug("[Blockcypher.getTx] input:")
@log.debug("-> txid: #{txid}")
@log.debug("[Blockcypher.getTx] will call '#{url}'")
end
req = nil
begin
req = RestClient.get(url)
rescue => e
if @log.error?
@log.error("[Blockcypher.getTx] RestClient.get raised exception:")
@log.error("#{e.class}, #{e.message}")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
raise e
end
if req == nil
if @log.error?
@log.error("[Blockcypher.getTx] failed to call REST")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
return nil
end
if req.code != 200
if @log.error?
@log.error("[Blockcypher.getTx] REST call returned "+ req.code.to_s)
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
return nil
end
if @log.debug?
@log.debug("[Blockcypher.getTx] REST call response:")
@log.debug(req.body)
end
res = JSON.parse req.body
confirmations_threshold = 5
if @config.key?("blockchain_confirmations")
confirmations_threshold = @config["blockchain_confirmations"]
end
if res != nil
if res.key?("confirmations")
if res["confirmations"] > confirmations_threshold
if res.key?("block_hash")
if res.key?("confirmed")
block_timestamp = nil
begin
block_timestamp = DateTime.parse(res["confirmed"]).to_i
rescue => e
if @log.error?
@log.error("[Blockcypher.getTx] DateTime.parse('confirmed').to_i raised exception:")
@log.error("#{e.class}, #{e.message}")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
raise e
end
if block_timestamp == nil
if @log.error?
@log.error("[Blockcypher.getTx] failed to convert 'confirmed' field to timestamp")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
return nil
end
op_return = nil
begin
op_return = self.getOpReturn(res)
rescue => e
if @log.error?
@log.error("[Blockcypher.getTx] getOpReturn raised exception:")
@log.error("#{e.class}, #{e.message}")
@log.error("-> txid: #{txid}")
@log.error("--> res:")
@log.error(res)
end
raise e
end
if op_return != nil
prefix = op_return[0..2]
if prefix == "VCH"
op_return = op_return[5..op_return.length]
return {
"size" => res["size"],
"block_hash" => res["block_hash"],
"block_timestamp" => block_timestamp,
"op_return" => op_return
}
else
if @log.error?
@log.error("[Blockcypher.getTx] wrong prefix '#{prefix}'")
@log.error("-> txid: #{txid}")
@log.error("--> res:")
@log.error(res)
end
end
else
if @log.error?
@log.error("[Blockcypher.getTx] failed to get OP_RETURN")
@log.error("-> txid: #{txid}")
@log.error("--> res:")
@log.error(res)
end
end
else
if @log.error?
@log.error("[Blockcypher.getTx] no 'confirmed' field in response")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
end
else
if @log.error?
@log.error("[Blockcypher.getTx] no 'block_hash' field in response")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
end
else
if @log.error?
@log.error("[Blockcypher.getTx] less than 6 confirmations")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
end
else
if @log.error?
@log.error("[Blockcypher.getTx] no 'confirmations' field")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
end
else
if @log.error?
@log.error("[Blockcypher.getTx] REST call - empty response")
@log.error("-> txid: #{txid}")
@log.error("--> url: #{url}")
end
end
return nil
end
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