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Author Topic: Bitcoin-core. Unhandled rejection RpcError: 404 Not Found when calling getBlockc  (Read 221 times)
educob (OP)
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September 15, 2018, 10:00:00 AM
Merited by DarkStar_ (2)
 #1

Please help me. I have lost a lot of time with this.

I am running a fully synchronized bitcoin-core mainnet node. I run this code to access the node:

Code:
import Client from 'bitcoin-core'
let client = new Client( { username: 'xxx', password: 'yyy', port: 8332})
client.getBlockchainInformation().then( res => console.log("res: ", res))

I have also tried without the port attribute and with port:8444. I get these errors:

Code:
W20180915-09:18:15.768(2)? (STDERR) Unhandled rejection RpcError: 404 Not Found
W20180915-09:18:15.768(2)? (STDERR)     at Client.rest (/home/r2d2/vue/txxx/node_modules/bitcoin-core/dist/src/parser.js:117:13)
W20180915-09:18:15.769(2)? (STDERR)     at apply (/home/r2d2/vue/txxx/node_modules/lodash/lodash.js:475:27)
W20180915-09:18:15.769(2)? (STDERR)     at Client.wrapper (/home/r2d2/vue/txxx/node_modules/lodash/lodash.js:5337:16)
W20180915-09:18:15.769(2)? (STDERR)     at Request.self.callback (/home/r2d2/vue/txxx/node_modules/request/request.js:185:22)
W20180915-09:18:15.769(2)? (STDERR)     at emitTwo (events.js:131:20)
W20180915-09:18:15.769(2)? (STDERR)     at Request.emit (events.js:214:7)
W20180915-09:18:15.769(2)? (STDERR)     at Request.<anonymous> (/home/r2d2/vue/txxx/node_modules/request/request.js:1161:10)
W20180915-09:18:15.769(2)? (STDERR)     at emitOne (events.js:116:13)
W20180915-09:18:15.769(2)? (STDERR)     at Request.emit (events.js:211:7)
W20180915-09:18:15.770(2)? (STDERR)     at IncomingMessage.<anonymous> (/home/r2d2/vue/txxx/node_modules/request/request.js:1083:12)
W20180915-09:18:15.770(2)? (STDERR)     at Object.onceWrapper (events.js:313:30)
W20180915-09:18:15.770(2)? (STDERR)     at emitNone (events.js:111:20)
W20180915-09:18:15.770(2)? (STDERR)     at IncomingMessage.emit (events.js:208:7)
W20180915-09:18:15.770(2)? (STDERR)     at endReadableNT (_stream_readable.js:1064:12)
W20180915-09:18:15.770(2)? (STDERR)     at _combinedTickCallback (internal/process/next_tick.js:138:11)
W20180915-09:18:15.770(2)? (STDERR) From previous event:
W20180915-09:18:15.770(2)? (STDERR)     at Client.getBlockchainInformation (/home/r2d2/vue/txxx/node_modules/bitcoin-core/dist/src/index.js:238:69)
W20180915-09:18:15.770(2)? (STDERR)     at Promise.asyncApply (server/jobs.js:24:10)
W20180915-09:18:15.771(2)? (STDERR)     at /home/r2d2/.meteor/packages/promise/.0.11.1.1vczms8.mxi5++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/meteor-promise/fiber_pool.js:43:40

Receiving rawTx and rawBlock notifications via zmq works ok cause, for a change, I found proper doc: Streaming transactions from bitcoind via ZeroMQ.

My bitcoin.conf file is:

Code:
##
## bitcoin.conf configuration file. Lines beginning with # are comments.
##

# Network-related settings:

# Run on the test network instead of the real bitcoin network.
#testnet=0

# Run a regression test network
#regtest=1
# when we don't need it to run as a daemon.
daemon=1

# Connect via a SOCKS5 proxy
#proxy=127.0.0.1:9050

# Bind to given address and always listen on it. Use [host]:port notation for IPv6
#bind=<addr>

# Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6
#whitebind=<addr>

txindex = 1

# Use as many addnode= settings as you like to connect to specific peers
#addnode=69.164.218.197
#addnode=10.0.0.2:8333

# Alternatively use as many connect= settings as you like to connect ONLY to specific peers
#connect=69.164.218.197
#connect=10.0.0.1:8333

# Listening mode, enabled by default except when 'connect' is being used
#listen=1

# Maximum number of inbound+outbound connections.
#maxconnections=

#
# JSON-RPC options (for controlling a running Bitcoin/bitcoind process)
#

# server=1 tells Bitcoin-Qt and bitcoind to accept JSON-RPC commands
server=1

# Bind to given address to listen for JSON-RPC connections. Use [host]:port notation for IPv6.
# This option can be specified multiple times (default: bind to all interfaces)
#rpcbind=<addr>
rpcbind=127.0.0.1

# If no rpcpassword is set, rpc cookie auth is sought. The default `-rpccookiefile` name
# is .cookie and found in the `-datadir` being used for bitcoind. This option is typically used
# when the server and client are run as the same user.
#
# If not, you must set rpcuser and rpcpassword to secure the JSON-RPC api. The first
# method(DEPRECATED) is to set this pair for the server and client:
rpcuser=xxx
rpcpassword=yyy
#
# The second method `rpcauth` can be added to server startup argument. It is set at intialization time
# using the output from the script in share/rpcuser/rpcuser.py after providing a username:
#
# ./share/rpcuser/rpcuser.py alice
# String to be appended to bitcoin.conf:
# rpcauth=alice:f7efda5c189b999524f151318c0c86$d5b51b3beffbc02b724e5d095828e0bc8b2456e9ac8757ae3211a5d9b16a22ae
# Your password:
# DONT_USE_THIS_YOU_WILL_GET_ROBBED_8ak1gI25KFTvjovL3gAM967mies3E=
#
# On client-side, you add the normal user/password pair to send commands:
#rpcuser=alice
#rpcpassword=DONT_USE_THIS_YOU_WILL_GET_ROBBED_8ak1gI25KFTvjovL3gAM967mies3E=
#
# You can even add multiple entries of these to the server conf file, and client can use any of them:
# rpcauth=bob:b2dd077cb54591a2f3139e69a897ac$4e71f08d48b4347cf8eff3815c0e25ae2e9a4340474079f55705f40574f4ec99

# How many seconds bitcoin will wait for a complete RPC HTTP request.
# after the HTTP connection is established.
#rpcclienttimeout=30

# By default, only RPC connections from localhost are allowed.
# Specify as many rpcallowip= settings as you like to allow connections from other hosts,
# either as a single IPv4/IPv6 or with a subnet specification.

# NOTE: opening up the RPC port to hosts outside your local trusted network is NOT RECOMMENDED,
# because the rpcpassword is transmitted over the network unencrypted.

# server=1 tells Bitcoin-Qt to accept JSON-RPC commands.
# it is also read by bitcoind to determine if RPC should be enabled
#rpcallowip=10.1.1.34/255.255.255.0
#rpcallowip=1.2.3.4/24
#rpcallowip=2001:db8:85a3:0:0:8a2e:370:7334/96
rpcallowip=127.0.0.1

# as seen in https://bitcoin.stackexchange.com/questions/71800/bitcoin-rpc-econnrefused:
port=8444

# Listen for RPC connections on this TCP port:
rpcport=8332

# You can use Bitcoin or bitcoind to send commands to Bitcoin/bitcoind
# running on another host using this option:
#rpcconnect=127.0.0.1

# Create transactions that have enough fees so they are likely to begin confirmation within n blocks (default: 6).
# This setting is over-ridden by the -paytxfee option.
#txconfirmtarget=n

# Miscellaneous options

# Pre-generate this many public/private key pairs, so wallet backups will be valid for
# both prior transactions and several dozen future transactions.
#keypool=100

# Pay an optional transaction fee every time you send bitcoins.  Transactions with fees
# are more likely than free transactions to be included in generated blocks, so may
# be validated sooner.
#paytxfee=0.00

# Enable pruning to reduce storage requirements by deleting old blocks.
# This mode is incompatible with -txindex and -rescan.
# 0 = default (no pruning).
# 1 = allows manual pruning via RPC.
# >=550 = target to stay under in MiB.
#prune=550

# User interface options

# Start Bitcoin minimized
#min=1

# Minimize to the system tray
#minimizetotray=1

# receiving raw transactions.
zmqpubrawblock=tcp://127.0.0.1:28332
zmqpubrawtx=tcp://127.0.0.1:28333

Thanks.
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There are several different types of Bitcoin clients. The most secure are full nodes like Bitcoin Core, which will follow the rules of the network no matter what miners do. Even if every miner decided to create 1000 bitcoins per block, full nodes would stick to the rules and reject those blocks.
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September 15, 2018, 07:53:25 PM
Merited by aliashraf (1)
 #2

getblockchaininformation is not a RPC command. You are probably looking for getblockchaininfo.

educob (OP)
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September 15, 2018, 08:36:48 PM
 #3

Hi.

If you take a look at the library "doc" https://github.com/ruimarinho/bitcoin-core#getblockchaininformationcallback the function is
getBlockchainInformation
If I use getBlockchainInfo I get "TypeError: client.getblockchaininfo is not a function"
Using "bitcoin-cli getblockchaininfo" external command, works perfectly.

I am surprised not to find a single complete example using the client.

Using postman with url localhost:8332/rest/tx/b4dd08f32be15d96b7166fd77afd18aece7480f72af6c9c7f9c5cbeb01e686fe.json and body parameters: username=xxx & password=yyy I get the same: "404 Not Found"
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September 15, 2018, 09:13:49 PM
Merited by DarkStar_ (2)
 #4

The solution was to insert "rest=1" in bitcoin.conf.

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