nSPV

Introduction

nSPV enhances the normal "Simple Payment Verification" (SPV) technology available for a Smart Chain. To learn more about regular SPV technology, read this entry on the Bitcoin wiki.

nSPV leverages the dPoW security mechanism of the Indexchain Platform to enable secure and scalable super-lite "SPV" clients. An nSPV client network utilizes a smaller amount of computation and storage resources compared to a normal SPV network. For all Smart Chains that enable nSPV, full nodes on the network can serve the necessary data to nSPV nodes for the latter to have full wallet functionality.

All Indexchain-compatible Smart Chains, including the DIC main chain, can utilize this technology.

More details are available in the blog posts here and here.

Installation

sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install libsodium-dev curl libevent-dev git cmake nano wget ntp ntpdate automake unzip autoconf libtool -y
git clone https://github.com/jl777/libnspv
cd libnspv
./autogen.sh
./configure
+./onetime # compiles cc support
make

<!---FIXME

Usage: nspv [COIN defaults to NSPV] (-c|continuous) (-i|-ips <ip,ip,...]>) (-m[--maxpeers] <int>) (-t[--testnet]) (-f <headersfile|0 for in mem only>) (-p <rpcport>) (-r[--regtest]) (-d[--debug]) (-s[--timeout] <secs>) <command> Supported commands: scan (scan blocks up to the tip, creates header.db file)

Examples: Sync up to the chain tip and stores all headers in headers.db (quit once synced):

nspv scan

Sync up to the chain tip and give some debug output during that process:

nspv -d scan

Sync up, show debug info, don't store headers in file (only in memory), wait for new blocks:

nspv -d -f 0 -c scan

--->

Enabling the nSPV Client

Copy the following code to the file named coins (located at the root of the source directory).

(Change each value as appropriate for the desired Smart Chain.)

{
  "coin": "COIN",
  "asset": "COIN",
  "fname": "Coin",
  "rpcport": 12345,
  "mm2": 1,
  "p2p": 12346,
  "magic": "feb4cb23",
  "nSPV": "5.9.102.210, 5.9.253.195, 5.9.253.196, 5.9.253.197, 5.9.253.198, 5.9.253.199, 5.9.253.200, 5.9.253.201, 5.9.253.202, 5.9.253.203"
}

Property Descriptions

Name

Type

Description

coin

(string)

the ticker of the coin

asset

(string)

the -ac_name parameter used to start the Smart Chain

fname

(string)

the full name of the Smart Chain

rpcport

(number)

the RPC port the Smart Chain's daemon uses to receive RPC commands

mm2

(number)

set this value to 1 if this coin has been tested and proves capable of functioning on MarketMaker 2.0 software

p2p

(number)

the p2p port the Smart Chain's daemon uses to communicate with other nodes

magic

(string)

the netmagic number for this Smart Chain. The decimal value of magic can be obtained by executing the getinfo RPC on a full node on the Smart Chain network. Convert the decimal value to hex and serialize it into 4 hexbytes

nSPV

(string)

the ip addresses of the nodes on the Smart Chain network

::: tip

If you find that the direction of magic is wrong, try reversing the order of the numbers.

:::

::: tip

The magic number can also be seen in the terminal as a stdout printout when the daemon is launched.

Example

>>>>>>>>>> COIN: p2p.40264 rpc.40265 magic.fe1c3450 4263261264 350689 coins

:::

::: tip

To start the nSPV client for a specific Smart Chain after its data has been added to the coins file, execute the following.

./nspv COIN

:::

Interacting with the nSPV Client

::: tip

The port in each of these examples is the port on which the nSPV client listens for RPC commands.

For DIC, the port is 7771. For any other Smart Chain, the port is the rpcport specified in the coins file.

This behaviour can be bypassed by setting the -p parameter.

:::

curl Commands Using Named Parameters

Use the example below as a template for creating new curl commands for any RPCs available in the nSPV API.

curl --url "http://127.0.0.1:$port" --data "{\"userpass\":\"$userpass\",\"method\":\"spentinfo\",\"vout\":1,\"txid\":\"e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855\"}"

curl Command Using the json2.0 Interface

<!--

Sidd: There was a mention below of a "doc", but I am assuming that the doc in question is this document, and that the following example is a good template to use?

gcharang: yes, the doc mentioned is the current document and the parameters' order should be as listed for each method; the example is good -->

When using this format for any RPC that requires parameters (also called "arguments"), provide the parameters in the order they are given in this documentation.

For example, the spentinfo RPC lists txid as the first parameter and vout as the second. Observe in the following example how the values in the "params" key match this order.

Use quotation marks "" for all strings.

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "spentinfo", "params": ["e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",1 ] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

Accessing localhost in the Browser

To access an nSPV client using a browser, create a url that uses http://127.0.0.1:<insert_port>/api/ as the base url, and add the rpc_name/ and any relevant additional parameters/ as additional url directions. See the example below.

Example

http://127.0.0.1:<port>/api/method/spentinfo/txid/e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855/vout/1

-p

Use this parameter at nSPV runtime to set the port on which the nSPV client should listen for RPC commands.

Example

The following command starts the nSPV client for the DIC main chain and listens on port 3000 for RPC commands.

./nspv DIC -p 3000

broadcast

broadcast hex

Use this method to broadcast the hex value returned by the spend method.

Arguments

Name

Type

Description

hex

(string)

the transaction in hex format

Response

Name

Type

Description

result

(string)

whether the command was successful

expected

(string)

the expected transaction id

broadcast

(string)

the broadcasted transaction id

retcode

(number)

the return code 0: no error -1,-2,-3: failure -200x: mostly OK, some of the inputs may not be notarized

type

(string)

the type of the broadcast

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "broadcast", "params": ["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"] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "expected": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
  "broadcast": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
  "retcode": 1,
  "type": "broadcast and mempool",
  "lastpeer": "nodeid.1"
}

</collapse-text>

getinfo

getinfo [hdrheight]

Use this method to get the general information on the state of the blockchain at the moment.

Arguments

Name

Type

Description

hdrheight

(number, optional)

supplies the height of the block for which the header data is required

Response

Name

Type

Description

result

(string)

whether the command was successful

nSPV

(string)

the mode of nSPV

address

(string)

the address corresponding to the wifkey

pubkey

(string)

the pubkey corresponding to the wifkey

wifexpires

(string)

the time in seconds till the login expires

height

(number)

the current height of the blockchain

chaintip

(string)

the blockhash of the last block

notarization

(json)

a json object containing the notarization details

notarized_height

(number)

the height of the latest block that has been notarized

notarized_blockhash

(string)

the blockhash of the latest block that has been notarized

notarization_txid

(string)

the id of the transaction in which the notarization data is included in the chain being dPoW'ed

notarization_txidheight

(number)

the height of the block in which the notarization transaction is included

notarization_desttxid

(string)

the id of the transaction in which the notarization data is included in the chain acting as the data store

header

(string)

a json object containing the details of the header (of the current block by default / block of height specified by hdrheight if it is specified)

height

(number)

the height of the block that has been queried

blockhash

(string)

the blockhash of the block that has been queried

hashPrevBlock

(string)

the blockhash of the block before the block that has been queried

hashMerkleRoot

(string)

the merkleroot of the block that has been queried

nTime

(number)

a timestamp recording when this block was created

nBits

(number)

the calculated difficulty target being used for this block

protocolversion

(string)

the version of the client; helps the nspv client disconnect from nodes that are out of date

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "getinfo", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "nSPV": "superlite",
  "height": 1458356,
  "chaintip": "09b322ed45c2346316fb7f5bc9fbd7a4e27ea1b4803f68ad4c9649c13f19b479",
  "notarization": {
    "notarized_height": 1458340,
    "notarized_blockhash": "02ec52149e0ebc3d8c0e33612f6a6da76ceb01d3604cd3a63269c9c14f8b50ce",
    "notarization_txid": "3f6e11d0f210fd2fa2d39359fae3e70ce63cfc78e2cf555b1a84d88eb7eab7da",
    "notarization_txidheight": 1458354,
    "notarization_desttxid": "500a12dd8aab6b82db602f3f8f7f80573f6d4af6be4d9eb96dee0accf4ecf1b6"
  },
  "header": {
    "height": 1458356,
    "blockhash": "09b322ed45c2346316fb7f5bc9fbd7a4e27ea1b4803f68ad4c9649c13f19b479",
    "hashPrevBlock": "08d31454a0f5a05c1cb194d608c803b94ec0012d0257d08102da8e26439d48af",
    "hashMerkleRoot": "26123db79cfa63d79e92a375271349e4ba4e0a6d9eddf3fc2044572d29045a16",
    "nTime": 1564069327,
    "nBits": 486605795
  },
  "protocolversion": 0,
  "lastpeer": "nodeid.1"
}

</collapse-text>

getnewaddress

getnewaddress

Use this method to create a new address.

Arguments

Name

Type

Description

(none)

Response

Name

Type

Description

wif

(string)

wifkey of the generated address

address

(string)

the generated address

pubkey

(string)

pubkey of the generated address

wifprefix

(number)

prefix of the generated wifkey; depends on the network

compressed

(number)

whether the wifkey generated is compressed

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "getnewaddress", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "wif": "Uxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "address": "Rxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "pubkey": "03xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "wifprefix": 188,
  "compressed": 1
}

</collapse-text>

getpeerinfo

getpeerinfo

Use this method to get the information of all peers on the network.

Arguments

Name

Type

Description

(none)

Response

Name

Type

Description

nodeid

(number)

the number given to a node by our instance of the nSPV client

ipaddress

(string)

the ipaddress of the node

port

(number)

the p2p port used to connect to this node

lastping

(number)

the unix time at which this node was last pinged

time_started_con

(number)

the unix time at which a connection to this node was established

time_last_request

(number)

the unix time at which a connection was last requested

services

(number)

(in development)

missbehavescore

(number)

the score given to this node if the node was misbehaving

bestknownheight

(number)

the height of the blockchain as best known by this node

in_sync

(string)

the sync status of the node; synced indicates that the client has verified that the chain tip's block header from the node links back to the last notarization; after the client been running a while, all honest nodes should be synced to the same block

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "getpeerinfo", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

[
  {
    "nodeid": 1,
    "protocolversion": 2,
    "ipaddress": "5.9.253.195",
    "port": 7770,
    "lastping": 1565175111,
    "time_started_con": 1565174366,
    "time_last_request": 1565175123,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663,
    "in_sync": "not_synced"
  },
  {
    "nodeid": 10,
    "protocolversion": 2,
    "ipaddress": "116.203.17.138",
    "port": 7770,
    "lastping": 1565175121,
    "time_started_con": 1565174376,
    "time_last_request": 1565175126,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 12,
    "protocolversion": 2,
    "ipaddress": "51.68.207.116",
    "port": 7770,
    "lastping": 1565175121,
    "time_started_con": 1565174376,
    "time_last_request": 1565175123,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 15,
    "protocolversion": 2,
    "ipaddress": "178.148.188.34",
    "port": 7770,
    "lastping": 1565175121,
    "time_started_con": 1565174376,
    "time_last_request": 1565175126,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 25,
    "protocolversion": 2,
    "ipaddress": "159.65.93.178",
    "port": 7770,
    "lastping": 1565175121,
    "time_started_con": 1565174376,
    "time_last_request": 1565175125,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 34,
    "protocolversion": 2,
    "ipaddress": "159.69.11.56",
    "port": 7770,
    "lastping": 1565174946,
    "time_started_con": 1565174386,
    "time_last_request": 1565175124,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 35,
    "protocolversion": 2,
    "ipaddress": "5.189.232.34",
    "port": 7770,
    "lastping": 1565174946,
    "time_started_con": 1565174386,
    "time_last_request": 1565175127,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 43,
    "protocolversion": 2,
    "ipaddress": "178.159.11.114",
    "port": 7770,
    "lastping": 1565174946,
    "time_started_con": 1565174386,
    "time_last_request": 1565175126,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663
  },
  {
    "nodeid": 50,
    "protocolversion": 0,
    "ipaddress": "159.69.45.70",
    "port": 7770,
    "lastping": 1565174946,
    "time_started_con": 1565174386,
    "time_last_request": 1565175122,
    "services": 0,
    "missbehavescore": 0,
    "bestknownheight": 1476663,
    "in_sync": "not_synced"
  }
]

</collapse-text>

hdrsproof

hdrsproof prevheight nextheight

This method scans backwards from the prevheight until the process encounters a notarization transaction, then forward from nextheight until the process encounters another notarization transaction.

Then the process finds the notarized blocks corresponding to these two notarization transactions.

Then the process returns all the block headers between these two notarized blocks.

Now that both ends of this segment of blocks are notarized blocks, all block headers in this segment can be validated to see if they link back to each other.

Arguments

Name

Type

Description

prevheight

(number)

the block number from which headers are required

nextheight

(number)

the block number to which headers are required

Response

Name

Type

Description

result

(string)

whether the command was successful

prevht

(string)

the height of the first notarized block below the height prevheight

nextht

(string)

the height of the first notarized block above the height nextheight

prevtxid

(string)

the id of the transaction that contains the notarization data of the block of height prevht

prevtxidht

(string)

the height of the block in which the transaction with id prevtxid is present

prevtxlen

(string)

the length of the transaction with id prevtxid

nexttxid

(string)

the id of the transaction that contains the notarization data of the block of height nextht

nexttxidht

(string)

the height of the block in which the transaction with id nexttxid is present

nexttxlen

(string)

the length of the transaction with id nexttxid

numhdrs

(string)

the number of headers being returned

headers

(string)

a json object containing the details of the header (of the current block by default / block of height specified by hdrheight if it is specified)

height

(number)

the height of the block that has been queried

blockhash

(string)

the blockhash of the block that has been queried

hashPrevBlock

(string)

the blockhash of the block before the block that has been queried

hashMerkleRoot

(string)

the merkleroot of the block that has been queried

nTime

(number)

a timestamp recording when this block was created

nBits

(number)

the calculated difficulty target being used for this block

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "hdrsproof", "params": [1456692, 1456694 ] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "prevht": 1456680,
  "nextht": 1456700,
  "prevtxid": "e82367899ee7a5cb65dabe058cd7369392564f83834c8f1f81a21958da5d241c",
  "prevtxidht": 1456693,
  "prevtxlen": 1637,
  "nexttxid": "f11f30e4e62ac3567fa553ace89b1fbde7ffaefaa4f94926f3561928a537b753",
  "nexttxidht": 1456713,
  "nexttxlen": 1630,
  "numhdrs": 21,
  "headers": [
    {
      "height": 1456680,
      "blockhash": "00000000a651e00fa2a71c47511be85ef87e83d5715be3a17ed943b141cdd4d9",
      "hashPrevBlock": "06a51aacc1cb0575cc0a0d33dd001409367fe55b5e97a6d1055d70f60a60ba15",
      "hashMerkleRoot": "4f999aa4c45c2ffc6e43f1c96d5bf8a85a70e056462ff81167ebc1a16698ebf4",
      "nTime": 1563968164,
      "nBits": 486609566
    },
    {
      "height": 1456681,
      "blockhash": "08075e165473d74b87d55ce7ffecd85fb29989876dd596de56ed5cb22eb02b93",
      "hashPrevBlock": "00000000a651e00fa2a71c47511be85ef87e83d5715be3a17ed943b141cdd4d9",
      "hashMerkleRoot": "731295c1dc6067df17b5ff8385213981eb4f65f09f8475e15bc53a55f77b6a5f",
      "nTime": 1563968224,
      "nBits": 486608614
    },
    {
      "height": 1456682,
      "blockhash": "08359b03c7493467c9dbc83ed40c1e606cf3f35a086dd044ac37247d3c298610",
      "hashPrevBlock": "08075e165473d74b87d55ce7ffecd85fb29989876dd596de56ed5cb22eb02b93",
      "hashMerkleRoot": "385ad9e93468c50169def8f30853b094ce8fc89a552deac1c7332956639e9281",
      "nTime": 1563968284,
      "nBits": 486609613
    },
    {
      "height": 1456683,
      "blockhash": "000000010981eef2db9a4a68c274e9e4fe3c8e9ac39e9c666926531ed808d37b",
      "hashPrevBlock": "08359b03c7493467c9dbc83ed40c1e606cf3f35a086dd044ac37247d3c298610",
      "hashMerkleRoot": "6484bec614bf2d4e5ad80e1360f4feb1445d3c24732e1c69bc755dea43be5887",
      "nTime": 1563968229,
      "nBits": 486609556
    },
    {
      "height": 1456684,
      "blockhash": "021ec75467e5b61c226b0f001ffa58e0b7bb6c20b3529fc5ea1f00584601fd64",
      "hashPrevBlock": "000000010981eef2db9a4a68c274e9e4fe3c8e9ac39e9c666926531ed808d37b",
      "hashMerkleRoot": "bd6fbe8e522cb8ae2c06a3af7dd24aa9c8f81e161b1ffd5af2f98434f31cb75f",
      "nTime": 1563968321,
      "nBits": 486609344
    },
    {
      "height": 1456685,
      "blockhash": "024fb917266ec5dc1442116696bb92fe1a19388e6c299362c8f21a895b484a4d",
      "hashPrevBlock": "021ec75467e5b61c226b0f001ffa58e0b7bb6c20b3529fc5ea1f00584601fd64",
      "hashMerkleRoot": "cfc5f2c113970aae7b268f6215dff2d88114f7ee625906f4af1000e55941672b",
      "nTime": 1563968400,
      "nBits": 486609586
    },
    {
      "height": 1456686,
      "blockhash": "07ff3fbe03ed0f8d4d672d278554131631405ee9c8550f93f5b92ae97255c841",
      "hashPrevBlock": "024fb917266ec5dc1442116696bb92fe1a19388e6c299362c8f21a895b484a4d",
      "hashMerkleRoot": "cd02fb3979c59c274e547ef040ac21e72516ec29512ef94d34e38886ce1c50ca",
      "nTime": 1563968498,
      "nBits": 486609053
    },
    {
      "height": 1456687,
      "blockhash": "0aa762a49575bed937e3b67ef7f35b50c73ba1e15885bcd561b0024ec63cdc8f",
      "hashPrevBlock": "07ff3fbe03ed0f8d4d672d278554131631405ee9c8550f93f5b92ae97255c841",
      "hashMerkleRoot": "933a601ec6640b1b327a742edfd4e14c0f1a293ad3fda15db9cb87910185bde7",
      "nTime": 1563968672,
      "nBits": 486608999
    },
    {
      "height": 1456688,
      "blockhash": "0330f6d6d7f2fd87b077165f5c0271129d2f000b65d876db2941c34f87da4491",
      "hashPrevBlock": "0aa762a49575bed937e3b67ef7f35b50c73ba1e15885bcd561b0024ec63cdc8f",
      "hashMerkleRoot": "f83e3585b96988d8dc531c7533ff0bff287ea29e5914b488cbbe3e2d480bb383",
      "nTime": 1563968732,
      "nBits": 486608215
    },
    {
      "height": 1456689,
      "blockhash": "00000000760596dbc4a35428f245346c740bda0c30f0d56136692ed023b0087e",
      "hashPrevBlock": "0330f6d6d7f2fd87b077165f5c0271129d2f000b65d876db2941c34f87da4491",
      "hashMerkleRoot": "3f7a1d70a9d5f7a7ab73862d9f89e2c1ad05d18d5fb04bf360a9b7e2029fe420",
      "nTime": 1563968711,
      "nBits": 486608250
    },
    {
      "height": 1456690,
      "blockhash": "0a735f0f144f0f3d079b9674ef0e3dc39b29ae7c254dccfc7e2b1dc8bf902eb7",
      "hashPrevBlock": "00000000760596dbc4a35428f245346c740bda0c30f0d56136692ed023b0087e",
      "hashMerkleRoot": "63734e94b3ce30f7f0de7a7e3546ee4617bfffca22391fcfac807cdc042aa8ed",
      "nTime": 1563968812,
      "nBits": 486608101
    },
    {
      "height": 1456691,
      "blockhash": "0ecceb771f4706188ac1db125ba3228ddd97d30043e437576605a764f43c57eb",
      "hashPrevBlock": "0a735f0f144f0f3d079b9674ef0e3dc39b29ae7c254dccfc7e2b1dc8bf902eb7",
      "hashMerkleRoot": "d7f6ea68b87b15dcadb8c7f56aebcc11c8cc395186822d67e56c99bcbe95ba30",
      "nTime": 1563968929,
      "nBits": 486609120
    },
    {
      "height": 1456692,
      "blockhash": "0000000034cb2953e5bb5d4137209e8d8ef98608b0dc50f77dfb5174b06f5a26",
      "hashPrevBlock": "0ecceb771f4706188ac1db125ba3228ddd97d30043e437576605a764f43c57eb",
      "hashMerkleRoot": "1f521201d68355b2f0ab5ac7b6e34c998409f60d1789415b3d7673b746ae5545",
      "nTime": 1563968934,
      "nBits": 486609800
    },
    {
      "height": 1456693,
      "blockhash": "01a724e7686a4dce74884ebd8bd869c855d1a71afc80c906830acfa1d14811cd",
      "hashPrevBlock": "0000000034cb2953e5bb5d4137209e8d8ef98608b0dc50f77dfb5174b06f5a26",
      "hashMerkleRoot": "0796959f32409791221a66859b6abbbf5ec31c2afcc22e7b606911da97612e4e",
      "nTime": 1563969054,
      "nBits": 486611292
    },
    {
      "height": 1456694,
      "blockhash": "000000008b4a3386489d1438ddc1220652942c95053f2c95c72c6868af215c8a",
      "hashPrevBlock": "01a724e7686a4dce74884ebd8bd869c855d1a71afc80c906830acfa1d14811cd",
      "hashMerkleRoot": "8ea989e47aa590fbabf19b5a7dbace61f32be3c51c558b991f7718b27eaa6b98",
      "nTime": 1563969053,
      "nBits": 486610300
    },
    {
      "height": 1456695,
      "blockhash": "00325ddee8e46aa1dcea791e370f87bcd94654a19d7bbf69d9fc6fd2afa5bc1f",
      "hashPrevBlock": "000000008b4a3386489d1438ddc1220652942c95053f2c95c72c6868af215c8a",
      "hashMerkleRoot": "dffc52dcc7c758616ec081e376f3385b1f75f41463e5fe2580e720b7c41637a1",
      "nTime": 1563969170,
      "nBits": 486609719
    },
    {
      "height": 1456696,
      "blockhash": "0121ba6e77b2d89461f23390193e5d355ba09abcebd8fa774d13dc925f67d927",
      "hashPrevBlock": "00325ddee8e46aa1dcea791e370f87bcd94654a19d7bbf69d9fc6fd2afa5bc1f",
      "hashMerkleRoot": "31fbd5fc898ec987575eb676abedcee5480375365e7554ac9aa90489c5e29e57",
      "nTime": 1563969248,
      "nBits": 486609177
    },
    {
      "height": 1456697,
      "blockhash": "008f9c7128023e04d1896d101a74b7a5020b4a9c4d372116f8a25117d6fc89b0",
      "hashPrevBlock": "0121ba6e77b2d89461f23390193e5d355ba09abcebd8fa774d13dc925f67d927",
      "hashMerkleRoot": "6122994bfb8f97dc6275119004c042afdd2cf6eab9a8e294f0ef5549793c39e2",
      "nTime": 1563969346,
      "nBits": 486610067
    },
    {
      "height": 1456698,
      "blockhash": "0dffa8155af91fb742dfc6252bd4f7bfd85e7c770db5b06edf45b54bed6afeb8",
      "hashPrevBlock": "008f9c7128023e04d1896d101a74b7a5020b4a9c4d372116f8a25117d6fc89b0",
      "hashMerkleRoot": "d2429d0ee8c131bdba55058e86d7e55c68041dcfe0c72ff8596542fc35571a2e",
      "nTime": 1563969406,
      "nBits": 486609959
    },
    {
      "height": 1456699,
      "blockhash": "0e4f73be5d71475d1203e2bd5350f631b4afc90db65ff1a46a0d0ce9ff6082b0",
      "hashPrevBlock": "0dffa8155af91fb742dfc6252bd4f7bfd85e7c770db5b06edf45b54bed6afeb8",
      "hashMerkleRoot": "0edb7a7f18d2bcf5fd5e1364cd913e8e9769bf7e51292d5d57e5b886fdf39834",
      "nTime": 1563969466,
      "nBits": 486610314
    },
    {
      "height": 1456700,
      "blockhash": "09b87ed9bc81684322cb3fd36775232d4609210ff75fe7a075a5f859f573d7f1",
      "hashPrevBlock": "0e4f73be5d71475d1203e2bd5350f631b4afc90db65ff1a46a0d0ce9ff6082b0",
      "hashMerkleRoot": "98547e5781d6a0d04fd952bd5ff92223bbb4ca03a991818c445f58d2ad88e8bc",
      "nTime": 1563969526,
      "nBits": 486609186
    }
  ],
  "lastpeer": "nodeid.1"
}

</collapse-text>

help

help

This method returns the help output of all available methods.

Arguments

Name

Type

Description

(none)

Response

Name

Type

Description

result

(string)

whether the command was successful

methods

(array of jsons)

an array containing a json object for each method

method

(string)

name of a method

fields

(array)

an array conataining the description of parameters expected

num

(number)

the number of methods available

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "help", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "methods": [
    { "method": "stop", "fields": [] },
    { "method": "help", "fields": [] },
    { "method": "logout", "fields": [] },
    { "method": "getnewaddress", "fields": [] },
    { "method": "getpeerinfo", "fields": [] },
    { "method": "login", "fields": [{ "wif": "string" }] },
    { "method": "broadcast", "fields": [{ "hex": "string" }] },
    {
      "method": "listunspent",
      "fields": [
        { "address": "string" },
        { "isCC": "uint32_t" },
        { "skipcount": "uint32_t" },
        { "filter": "uint32_t" }
      ]
    },
    {
      "method": "listtransactions",
      "fields": [
        { "address": "string" },
        { "isCC": "uint32_t" },
        { "skipcount": "uint32_t" },
        { "filter": "uint32_t" }
      ]
    },
    { "method": "notarizations", "fields": [{ "height": "uint32_t" }] },
    {
      "method": "hdrsproof",
      "fields": [{ "prevheight": "uint32_t" }, { "nextheight": "uint32_t" }]
    },
    { "method": "getinfo", "fields": [{ "hdrheight": "uint32_t" }] },
    {
      "method": "txproof",
      "fields": [
        { "txid": "hash" },
        { "vout": "uint32_t" },
        { "height": "uint32_t" }
      ]
    },
    {
      "method": "spentinfo",
      "fields": [{ "txid": "hash" }, { "vout": "uint32_t" }]
    },
    {
      "method": "spend",
      "fields": [{ "address": "string" }, { "amount": "float" }]
    },
    {
      "method": "mempool",
      "fields": [
        { "address": "string" },
        { "isCC": "uint32_t" },
        { "memfunc": "uint32_t" },
        { "txid": "hash" },
        { "vout": "uint32_t" },
        { "evalcode": "uint32_t" },
        { "CCfunc": "uint32_t" }
      ]
    }
  ],
  "num": 16
}

</collapse-text>

listtransactions

listtransactions [address [isCC [skipcount [filter]]]]

This method returns a list of transactions for an address.

Arguments

Name

Type

Description

address

(string, optional)

the address for which transactions are to be listed; if not specified, the current active address is used

isCC

(number, optional)

only return transactions that are related to Antara modules

skipcount

(number, optional)

skips the specified number of transactions starting from the oldest; always returns the latest transaction

filter

(number, optional)

(in development)

Response

Name

Type

Description

result

(string)

whether the command was successful

txids

(array of jsons)

an array containing jsons that describe the transactions

height

(number)

the height of the block in which the transaction was included

txid

(string)

the id of the transaction

value

(number)

the amount of coins in the vin/vout (inputs and outputs)

vin/vout

(number)

the index of vin/vout in the transaction

address

(string)

the address for which the transactions are being returned

isCC

(number)

whether the address belongs to an Antara module

height

(number)

the height of the blockchain when this response was returned

numtxids

(number)

number of vouts/vins being returned

skipcount

(number)

the number of transactions that have been skipped, starting from the oldest transaction

filter

(number)

(in development)

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "listtransactions", "params": ["RFmQiF4Zbzxchv9AG6dw6ZaX8PbrA8FXAb"] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "txids": [
    {
      "height": 1453830,
      "txid": "04df7641f114c14fa4fbe2ec6e8ef5b55417f78fd12ef90b1217fcf512cb5ec2",
      "value": 2.98,
      "vout": 1
    },
    {
      "height": 1453881,
      "txid": "e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",
      "value": -2.98,
      "vin": 0
    },
    {
      "height": 1453881,
      "txid": "e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",
      "value": 2.00999,
      "vout": 1
    },
    {
      "height": 1458037,
      "txid": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
      "value": 1,
      "vout": 0
    },
    {
      "height": 1458037,
      "txid": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
      "value": -2.00999,
      "vin": 0
    },
    {
      "height": 1458037,
      "txid": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
      "value": 1.00989,
      "vout": 1
    }
  ],
  "address": "RFmQiF4Zbzxchv9AG6dw6ZaX8PbrA8FXAb",
  "isCC": 0,
  "height": 1458248,
  "numtxids": 6,
  "skipcount": 0,
  "filter": 0,
  "lastpeer": "nodeid.1"
}

</collapse-text>

listunspent

listunspent [address [isCC [skipcount [filter]]]]

Use this method to retrieve all unspent outputs belonging to an address.

Arguments

Name

Type

Description

address

(string, optional)

the address for which transactions are to be listed; if not specified, the current active address is used

isCC

(number, optional)

only return transactions that are related to Antara modules

skipcount

(number, optional)

skips the specified number of transactions starting from the oldest; always returns the latest transaction

filter

(number, optional)

(in development)

Response

Name

Type

Description

result

(string)

whether the command was successful

utxos

(array of jsons)

an array containing jsons that describe the outputs

height

(number)

the height of the block in which the output was created

txid

(string)

the id of the transaction in which the output is present

vout

(number)

the index of the vout (output) in the transaction

value

(number)

the amount of coins in the vout (output)

rewards

(number)

the amount of active user rewards claimable by the output

address

(string)

the address for which the transactions are being returned

isCC

(number)

whether the address belongs to an Antara module

height

(number)

the height of the blockchain when this response was returned

numutxos

(number)

number of vouts(outputs) being returned

balance

(number)

the total balance available for the address

rewards

(number)

the total rewards claimable by the address

skipcount

(number)

the number of utoxs that have been skipped; from the oldest

filter

(number)

(in development)

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "listunspent", "params": ["RFmQiF4Zbzxchv9AG6dw6ZaX8PbrA8FXAb"] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "utxos": [
    {
      "height": 1458037,
      "txid": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
      "vout": 0,
      "value": 1,
      "rewards": 0
    },
    {
      "height": 1458037,
      "txid": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
      "vout": 1,
      "value": 1.00989,
      "rewards": 0
    }
  ],
  "address": "RFmQiF4Zbzxchv9AG6dw6ZaX8PbrA8FXAb",
  "isCC": 0,
  "height": 1458307,
  "numutxos": 2,
  "balance": 2.00989,
  "rewards": 0,
  "skipcount": 0,
  "filter": 0,
  "lastpeer": "nodeid.17"
}

</collapse-text>

login

login wif

Use this method to log in to an address using its wifkey.

Arguments

Name

Type

Description

wif

(string)

the wifkey (wallet import format of the privatekey)

Response

Name

Type

Description

result

(string)

whether the command was successful

status

(string)

the time till the expiry of the login

address

(string)

the address corresponding to the wifkey

pubkey

(string)

the pubkey corresponding to the wifkey

wifprefix

(number)

the prefix of the wifkey (indicates the intended network for the wifkey)

compressed

(boolean)

indicates whether the wifkey is compressed

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "login", "params": ["Uxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "status": "wif will expire in 777 seconds",
  "address": "Rxxxxxxxxxxxxxxxxxxx",
  "pubkey": "03xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "wifprefix": 188,
  "compressed": 1
}

</collapse-text>

logout

logout

Use this method to log out of the current active address.

Arguments

Name

Type

Description

(none)

Response

Name

Type

Description

result

(string)

whether the command succeeded

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "logout", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{ "result": "success" }

</collapse-text>

mempool

mempool address isCC memfunc [txid vout evalcode ccfunc]]]

This method returns the current transactions in the mempool. The various parameters can be used to filter the transactions.

<!--FIXME which args are optional and eachone's use

and values and meanings of memfunc

memfunc (0 all, 1 address recv, 2 txid/vout spent, 3 txid inmempool 4)

gcharang: all the arguments are optional; and they are in development -->

Arguments

Name

Type

Description

address

(string, optional)

if the transactions should belong to the address

isCC

(number, optional)

if the transactions should belong to any Antara module

memfunc

(number, optional)

(in development)

txid

(string, optional)

(in development)

vout

(number, optional)

(in development)

evalcode

(number, optional)

(in development)

ccfunc

(number, optional)

(in development)

Response

Name

Type

Description

result

(string)

whether the command was successful

txids

(array of strings)

the ids of the transactions in the mempool

address

(string)

the address that was used to filter the mempool

isCC

(number)

if the transactions returned belong to an Antara Module

height

(number)

the height of the blockchain when this response was returned

numtxids

(number)

the number of transaction ids that are being returned

txid

(string)

(in development)

vout

(number)

(in development)

memfunc

(number)

(in development)

type

(string)

the type of the filter apploed to the mempool

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "mempool", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "txids": [
    "9f4a28bf746fc4a8f627302ff09159345a2ca4e3be404b7f4b02e90865c1b301",
    "f676945f97e791c54e9c2e507e715cd160ec39452aa9019610861039c199d532",
    "d6712c027c2396265b87a1645cda8fcb8ff40d6c0dd86ff932f25b51387b613b",
    "eb36d507991accc337c45bd9f0113050223fa0b7b43c76b400cf63fb21cfd26e",
    "76bafb69f1c58a0726df1719aa5eb16cdc026f06969dfeef20e5752889381b6f",
    "2d02915d392ca9323fbd2344e9f951dddf59a4a77794d121e88055d90df1bed1",
    "94f61cf68e30764ef31ea0376d74a1c9d774f6ccb4f2e612f9b650ab38405adf",
    "050020b9867306c2ab2b131391a9edf0ab72e4d4a018bb1837734850f78ba8f1"
  ],
  "address": "",
  "isCC": 0,
  "height": 1458372,
  "numtxids": 8,
  "txid": "0000000000000000000000000000000000000000000000000000000000000000",
  "vout": 0,
  "memfunc": 0,
  "type": "all mempool",
  "lastpeer": "nodeid.20"
}

</collapse-text>

notarizations

notarizations height

This method returns the notarization data for a given height.

Arguments

Name

Type

Description

height

(number)

the height at which notarization data is required

Response

Name

Type

Description

result

(string)

whether the command was successful

prev

(json)

the details of the previous notarization

notarized_height

(number)

the height of the latest block that has been notarized

notarized_blockhash

(string)

the blockhash of the latest block that has been notarized

notarization_txid

(string)

the id of the transaction in which the notarization data is included in the chain being dPoW'ed

notarization_txidheight

(number)

the height of the block in which the notarization transaction is included

notarization_desttxid

(string)

the id of the transaction in which the notarization data is included in the chain acting as the data store

next

(json)

the details of the next notarization

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "notarizations", "params": [145677] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "prev": {
    "notarized_height": 1457780,
    "notarized_blockhash": "0cd381289fcc84f28ed9759e6803d2da4f60757da55b91eb8c78b12d99f0f855",
    "notarization_txid": "fff01156657dccb6ba80cd6aa84676a2b66f7f5eb6b882f2cbe6fe87523bd3aa",
    "notarization_txidheight": 1457796,
    "notarization_desttxid": "a2a448d2094eb0687072c38332a5629595a1b30c51aa40b7c8ee8113054a63fc"
  },
  "next": {
    "notarized_height": 1457820,
    "notarized_blockhash": "000000010110afdc044b7652e9be1d177cfb369d16f431c421b3030ab9ca3e4a",
    "notarization_txid": "ba3e0792de1324cb557b9b8a8449d9142d1699e54e677f774d8491c4036f5e1c",
    "notarization_txidheight": 1457833,
    "notarization_desttxid": "e699a1cd513a35cfb8075cbbb5d3db62a6cbcdcced5744e2dcd6744d5e399126"
  },
  "lastpeer": "nodeid.1"
}

</collapse-text>

spend

spend address amount

<!--FIXME doc retcodes? -->

This method can be used to spend coins from the current active address to any other address.

Arguments

Name

Type

Description

address

(string)

the address of the recipient

amount

(number)

the amount to be sent

Response

Name

Type

Description

rewards

(string)

the rewards being claimed by this spend transaction

validated

(string)

(in development)

tx

(json)

a json object containing details of the transaction

nVersion

(number)

version of the Indexchain daemon

vin

(array of jsons)

the inputs being consumed by the transaction

txid

(string)

the id of the transaction whose input is being spent

vout

(number)

the output number in the above transaction

scriptSig

(string)

the redeem script that satisfies the scriptPubkey of the above output

sequenceid

(number)

the sequence number that has been set

vout

(array of jsons)

the outputs being created by the transaction

value

(string)

the value in the output

scriptPubKey

(string)

the locking script placed on the above value

nLockTime

(number)

the locktime that has been set

nExpiryHeight

(number)

the block height after which the transaction will be removed from the mempool if it has not been mined

valueBalance

(number)

(in development)

result

(string)

whether the command succeeded

hex

(string)

the transaction in hex format; this should be broadcast to the network using the broadcast method

retcodes

(number)

the return codes; an indication of the success or failure of the creation of the transaction

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "spend", "params": ["RFmQiF4Zbzxchv9AG6dw6ZaX8PbrA8FXAb",1 ] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "rewards": "0.00000000",
  "validated": "0.00000000",
  "tx": {
    "nVersion": 4,
    "vin": [
      {
        "txid": "e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",
        "vout": 1,
        "scriptSig": "47304402206774ff903a8a4b73bcd5a79fe5c744f34d2263160cd8877c198c2228c66a8a42022063e1d2d6403c395e3472a6a509f01cbff0b90e3413bc6f7bc492649302a4a64001210217a6aa6c0fe017f9e469c3c00de5b3aa164ca410e632d1c04169fd7040e20e06",
        "sequenceid": 4294967295
      }
    ],
    "vout": [
      {
        "value": 1,
        "scriptPubKey": "76a9144726f2838fc4d6ac66615e10604e18926e9b556e88ac"
      },
      {
        "value": 1.00989,
        "scriptPubKey": "210217a6aa6c0fe017f9e469c3c00de5b3aa164ca410e632d1c04169fd7040e20e06ac"
      }
    ],
    "nLockTime": 1564049127,
    "nExpiryHeight": 0,
    "valueBalance": 0
  },
  "result": "success",
  "hex": "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",
  "retcodes": [0],
  "lastpeer": "nodeid.1"
}

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spentinfo

spentinfo txid vout

This method returns the spent info of the output specified by the arguments.

Arguments

Name

Type

Description

txid

(string)

the id of the transaction whose spent info is required

vout

(number)

the vout number in the above transaction whose spent info is required

Response

Name

Type

Description

result

(string)

whether the command succeeded

txid

(string)

the id of the transaction whose spent info is returned

vout

(string)

the vout number in the above transaction whose spent info is required

spentheight

(string)

the block height at which the output has been spent

spenttxid

(string)

the id of the transaction that spent this output

spentvini

(string)

the input number of this output in the transaction that spent it

spenttxlen

(string)

the length of the transaction that spent this output

spenttxprooflen

(string)

the length of proof of the transaction that spent this output

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "spentinfo", "params": ["e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",1 ] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "result": "success",
  "txid": "e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",
  "vout": 1,
  "spentheight": 1458037,
  "spenttxid": "c76fede03fd821cf718b8ca7de898b95d04d7b9f7fcaeda89ccc00519476ec4a",
  "spentvini": 0,
  "spenttxlen": 254,
  "spenttxprooflen": 1655,
  "lastpeer": "nodeid.1"
}

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stop

stop

Stops the nSPV instance associated with the port specified in the curl command.

Arguments

Name

Type

Description

(none)

Response

Name

Type

Description

result

(string)

whether the command was successful

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "stop", "params": [] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{ "result": "success" }

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txproof

txproof txid vout [height]

This method is an internal function used by the gettransaction method.

Arguments

Name

Type

Description

txid

(string)

the id of the transaction whose proof is requested

vout

(number)

the number of the output in the above transaction

height

(number, optional)

Response

Name

Type

Description

txid

(string)

the id of the transaction whose proof is returned

height

(string)

the height at which the proof of the transaction is returned

txlen

(string)

the length of the transaction

txprooflen

(string)

the length of the proof for the transaction

lastpeer

(string)

the last known peer

📌 Examples

Command

curl --data-binary '{"jsonrpc": "2.0", "id":"curltest", "method": "txproof", "params": ["e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",0,1453881 ] }' -H 'content-type: text/plain;' http://127.0.0.1:$port/

<collapse-text hidden title="Response">

{
  "txid": "e07709088fa2690fdc71b43b5d7760689e42ca90f7dfb74b18bf47a1ad94c855",
  "height": 1453881,
  "txlen": 244,
  "txprooflen": 1655,
  "lastpeer": "nodeid.1"
}

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