MultiChain Developer Q&A - Recent questions tagged address

How to get the address for grant connect in multichain demo?

Sun, 27 Nov 2022 10:34:38 +0000

Hello:
I am new to multichain, now I have downloaded and want to set up multi-chain demo on my Windows 10 PC, I want to use the same machine for testing first. I downloaded the version 2.3.1 for Windows, I run the following command:

D:\multichain-windows-2.3.1>multichaind chain1 -daemon

MultiChain 2.3.1 Daemon (Community Edition, latest protocol 20013)

Looking for genesis block...
Genesis block found

Other nodes can connect to this node using:
multichaind chain1@172.22.160.1:4801

This host has multiple IP addresses, so from some networks:
multichaind chain1@192.168.1.129:4801

Listening for API requests on port 4800 (local only - see rpcallowip setting)

Node ready.

Now, I try to connect from the same machine.
I know I should use datadir to launch multichaind in the same PC, but there is an imporant issue which I have to know is what is the address for grant connect command.
Someone said I have to ask Adress admin, but I am the only person to use this multi-chain nodes, I can not ask anyone else.
I want to know how to get the address for grant connect command.
Or can I run multi-chain CLI to generate one address?
Thanks

second server with same(persistent) waller address

Fri, 21 Jan 2022 15:57:57 +0000

Hi

In this tutorial: https://www.multicchain.com/getting-started/ we have this command: multichaind chain1@[ip-address]:[port]
If I restart the sencond server several times and execute the previous command, a new wallet address is always generated.

Is it possible to start the second server and always use the same address?
That is, I don't want the second server to keep generating new wallet addresses on each connection, is it possible for the second server to always use the same wallet address?

thanks

This wallet contains no addresses with permission to this stream and global send permission.

Mon, 31 May 2021 12:23:33 +0000

Hello, We are using 10 nodes and permissions to all 10 nodes have been granted through same way. 9/10 nodes are working properly. Even though connect, send, receive and write to stream permissions are granted on 10th node, when we perform a transaction from that particular node, we got the error: This wallet contains no addresses with permission to this stream and global send permission. Kindly let us know the appropriate solution. As we are following the same procedure mentioned on your documentation and 9 out of 10 nodes are working fine. But on each day, any node out of 10 nodes stops working and throws this error. And we delete that node, reconnect it , but the same error occurs.

Get ip address of all nodes

Mon, 15 Mar 2021 14:43:33 +0000

Hello!

If i create a blockchain for example, for 3 nodes where1 node is a server. I can get information from command getpeerinfo on node 1 about ip addresses of all nodes, but can see only node1(server) Ip address from node 2 and node 3. Can i somehow see information about all nodes from any node i want? For example i want to see ip address of node 1 and node 2 from node3 and back from node 2. Thank you!

how to upgrade stream filters code? And how to delete existing filter?

Wed, 15 Apr 2020 14:04:29 +0000

how to update filters code which is already created and s there any way to delete the filter?

Please Provide Example of 4 steps of "To use an approval" of transaction-filter github code: To use an approval"

Sat, 21 Mar 2020 10:30:32 +0000

Sir the ways you mentioned are not helpful

Referer this code:

https://github.com/MultiChain/smart-filter-examples/blob/master/transaction-filters/approve-asset-transfer.js

Here they have mentioned steps "to use an approval" in which the commands which are mentioned are:

createrawsendfrom and appendrawtransaction, there is no syntax given in any links provided by multichain and the links which you have mentioned in my previous question.

You may say the other commands are similar so I should refer that, so I would like to tell you that I have already referred and tried executing that and accordingly I also tried above commands but I'm facing syntax issue that is why I wanted proper guidance. If you could provide me that 4 steps example with syntax then I would really appreciate it.

Can you please provide me an example of "To use an approval" steps:

Thu, 19 Mar 2020 16:45:32 +0000

Can you please give me an example of those 4 steps?? I know the commands are given but if any demo example you can give consisting of those 4 steps would be really helpful for me. Please I request you.

In that code link it is said that first, we need to send approval, so please provide me the example where you first send approval using "sendfrom" command and then those 4 steps.
Sender address you can take :1KB85GgVgHE8fw6tMMeQ7DYS9fkY192yk8uy1V
Receiver address you can take :1MB85GgVgHE8fw6tMMeQ7DYS9fkY192yk8uy1V

Transfer all metadata (Assets, Subscribtions, Rights, ...) of an old address to a new one automatically.

Tue, 26 Nov 2019 17:17:32 +0000

Hello,

is it possible, when creating a new address, to transfer all rights, assets, streams, subscriptions,... stored on the old address to the new address and to block the old address? Or do I have to manually transfer all assets and subscriptions and the administrator(s) have to assign new rights and withdraw the old rights?
The idea behind this is that there is only one active address per node that could be changed regularly with a new address to ensure maximum anonymity?

- Can you please explain what is the point of having many different addresses with different rights on a single node instead of only a single address per node?

Thank you!

Stream permission by address

Thu, 04 Jul 2019 03:09:47 +0000

Scenario:
Node A creates a stream "Stream1". I believe only in Enterprise I can block node B from joining?
Let say they have joined, can I control which stream items are visible to node B?

Identify address nodes

Thu, 30 May 2019 06:43:39 +0000

Hello multichain,

I have created two nodes lets say N1 and N2. the chain has been created on N1 and N2 is connecting to N1.

I have created three addresses on N1 and two addresses on N2. If I do getaddresses on N1 I get those three addresses and same on N2 I get two addresses. But in application given a address is it possible to identify which node the address belongs to?

Create Multiple Address in a Node in Multichain

Mon, 22 Apr 2019 11:20:50 +0000

Hi Guys,

I am new to MultiChain and have just started wit it. I have below use-case:-

1) To create Multiple address in a single Node where each address belong to a user.

2) To have a second Node with one address.

Both the Nodes will be connected and will write data to a commons stream.

My question is "Is it possible to have above scenarios"? If yes the how we can create multiple address in a single node.? and is it a right way to do.?

Thanks and Regards,

Vishesh.

how to manage node in blockchains for multi chain platform?

Wed, 20 Mar 2019 12:10:15 +0000

Script to deploy multichain and blockchains

Wed, 27 Feb 2019 08:30:46 +0000

Hi, i would like to write a bash script wich will automaticaly deploy .tar etc on a new node but also to make this new node connect on my blockchains.

The problem is when I do "multichaind CHAINNAME@ip;port " I see my connection's adress but I have to add this by myself using a node already connected.

The problem is how can I do to automaticaly get this adress and write rights on it to allow the adress of my new node to connect on my blockchain, on my script?

Thanks.

Permission on address

Wed, 20 Feb 2019 11:11:21 +0000

Hi,

I have a single node setup in MC 2.
Two addresses A1 and A2 are created to publish data to stream S1 and both have permission to connect and send.

I would like to know if we can have a permission management where the data published by A1 should be seen only A1 and not by any other address A2 and vice versa.

Thanks.

Assign Label to Address

Fri, 25 Jan 2019 20:23:40 +0000

How do we assign Labels (strings) to addresses via the command line interface (without setting up and using web demo)?

We would like to be able to do a mass assignment of 1..n labels >> 1..n addresses

Cheers,

Srinjoy

Scope and use cases for addresses (and not key pairs)

Thu, 17 Jan 2019 18:33:12 +0000

Hi,

I'm a newbie to Multichain and I'm trying to understand how everything fits in terms of users. Let me explain.

Typically in an application, security is defined by authentication and authorization. Authentication is about users and their passwords (to be simplistic), and authorization is about what an already authenticated user can do or cannot. These are basic security concepts.

If I try to extrapolate such concepts to Multichain, this is where I need some help to fit them properly, so please correct me if I'm mistaken.

As far as I understand Multichain, there are two types of authentication:

At the node level --> Where you can configure whether anyone can join (public blockchain) or they need to be granted access (private blockchain).
At the wallet level --> Where you get an address and can start running actions against the blockchain (based on your permissions, of course).

While the former seems pretty clear to me, the latter poses some doubts:

If I get an address in a node, and permissions for whatever actions, then such address becomes both the username and the password because I just need to indicate it when running commands like publishing or subscribing to a stream; in other words, I don't need to sign anything or use any private key (which is not even visible when you create a new address with 'getnewaddress') and just the address is enough. Is my understanding correct?
So if I just need the address, isn't this a security issue as anyone who finds it out can impersonate me?
Therefore, when using 'getnewaddress', is such address actually becoming sort of the "do not share, do not disclose" information, similarly to a private key?

My confusion here is basically that I've been playing around with public test blockchains in the past (Ethereum, Bitcoin) and when creating a wallet (i.e. an address in the scope of Multichain), I was given also the private key, so whenever I wanted to send a transaction, I had to use my wallet address, but always sign it with my private key. However, in Multichain you would only need the wallet address.

Now sure if I'm exposing my concerns properly here, but I would like to really understand what the use cases are for addresses created with 'getnewaddress'.

Also reading the docs I've found a reference in 'getnewaddress' to a parameter 'accounts', but I haven't been able to find any documentation around it. Could you also please elaborate a bit more on this?

Thanks!

Get Inactive nodes

Thu, 17 Jan 2019 06:18:46 +0000

I'm trying to find a way to measure the health of the network. So I would like to know if it's possible to retrieve the inactive nodes (nodes that have permissions to connect and perform transaction but are currently offline) in the network. I know that each node is not necessarily connected to all other nodes (depending on network size), so getting all nodes that have connect permissions and removing the nodes that "my" node is connected to will not give me all the inactive nodes as that is not necessarily true. It could just be that my node is not connected to it. So what are my options? If I'm not able to get all the inactive nodes, is there a way to get all the nodes that "my" node was previously connected to but is no longer connected to? Can this be used to determine an inactive node? Also, I have read that depending on the network size, each node can be connected to all other nodes, is there a set max number of nodes? Is it possible to know the limit? Thanks for the help.

Checking which nodes are active and which are down

Wed, 16 Jan 2019 08:22:55 +0000

I was wondering if there is anyone to determine which nodes are currently down (no internet or machine error) without going on every node.

How to create a MultiChain private key?

Tue, 08 Jan 2019 10:00:08 +0000

https://www.multichain.com/developers/address-key-format/

-------------------------------------------------------------------------------------------

4. Calculate the SHA-256 of the extended private key:
742D5B3C59BB25F077AACB33D5770AAE22FD5639E8F9A7742BADEF84BCDFB4CC

5. Calculate the SHA-256 hash of the previous SHA-256 hash:
4FBB9708A0B5F2F5AC384CAC22C69CCE3F7DCE6166DE63B5AFE35E5D59767F18

-------------------------------------------------------------------------------------------

I'm following [How to create a MultiChain private key] step by step.

At the step 5, I got different hash value.

For example, the document says "4FBB9708A0B5F2F5AC384CAC22C69CCE3F7DCE6166DE63B5AFE35E5D59767F18".

But I have got the value "DCC0E35E31C131F6CD010A1689F82D17BD8482BABED7949253854DB6037CD3A5"

I got the value from this site (https://passwordsgenerator.net/sha256-hash-generator/)

I don't understand why two values are different.

Has the admin got access to see other wallet/address transaction?

Wed, 05 Dec 2018 09:05:34 +0000

Hi Multichain,
I wanted to know if Multichain allows the Address with ADMIN permissions, see the the transaction history of created and validated address/wallet with limited permissions?

Note: The address can be created by any one of the main server nodes in the Consortium network.

Can I revoke access for an address in a node to view items in a stream

Sat, 01 Dec 2018 09:30:25 +0000

Dear all,

I want to create a stream- stream1 , say suppose by an address label x1 , i want to grant a limited time permission to address label x2 to view the items in stream1 , now can i create a workflow for x1 to grant or revoke permission to x2 ? , i have checked the api commands which revokes the access for address to block chain (like create , connect , send , receive ..etc) but can it be done stream wise??

both the address would be on same node

How create second Publisher (Address) in a Multichain(Node) ?

Thu, 29 Nov 2018 09:35:54 +0000

I want to add one more Publisher (Address) in a Multichain (Node) in Cloud Foundry Environment. Need some help in achieving the same.

get asset metadata of an address

Wed, 28 Nov 2018 14:20:12 +0000

I'd like to know if there is a API to get the metadata of an asset which owned by a specific address. I know about the listassets with verbose=true and getaddresstransaction for getting metadata of issued assets but I'd like to retrieve metadata specific to an owner. I know that assets are fungible.

I try to use Multichain concepts to create a logic where I can store and retrieve origin and current owner of an asset. Could you tell me if there is a way.

My second question is regarding getting the issuer of an asset which is owned by a specific address. Just imagine that the same asset has been issued by different addresses. I like to know who issued my asset which I currently own.

Thank you!

how to import bitcore generate address to multichain node ?

Sun, 21 Oct 2018 08:24:50 +0000

when i try to import bitcore generated address it gives -5 error i,e. invalid multichain address or script.

how to import the whole wallet with all addresses and transactions in a new chain ?

Fri, 19 Oct 2018 09:36:59 +0000

I am running a multichain node and for security purpose i want to run another multichain node to be exact replica of this node so that i don't loose the addresses and their tokens in case anyone accesses my node and stops it.

how do I assign receive only permission for an asset to an address

Tue, 25 Sep 2018 04:29:59 +0000

Hi , I have two nodes . 1st is root node and 2nd is connected to 1st one. 1st node granted connect permission to second address. Now I want to create a asset from 1st node and send to 2nd one. 2nd node can only receive it but cant spend/send it to others.

when I assign receive only permission to 2nd node from node one , it throws error

E:\blockchain\multichain2-node1>multichain-cli chain1 grant 15mMSv8GPa1BF3yJootBsDPZeP4e56iQQ7Amoy asset5.receive
{"method":"grant","params":["15mMSv8GPa1BF3yJootBsDPZeP4e56iQQ7Amoy","asset5.receive"],"id":1,"chain_name":"chain1"}

error code: -8
error message:
Invalid permission

Can you grab the wallet address of the second server without first having to connect to a chain?

Mon, 24 Sep 2018 20:41:46 +0000

Hello,

In the 'Getting Started' guide, 2. Connecting to a blockchain states that after the second server runs multichaind chain1@[ip-address]:[port], you'll be shown a message containing an address in the node's wallet.

1. Is there anywhere else we can get the node's wallet address, without having to try to connect to a chain? The api commands I see all require something like multichain-cli [chain name] getaddresses

2. Out of curiosity, is the node's wallet address the server's public key?

Thank you!

how to assign readable label to an address

Fri, 21 Sep 2018 11:55:57 +0000

Hi , I have 2 nodes running and connected to chain1. each node has multiple address. address from one node want to communicate with address of another node. As it is private blockchain , I am building an UI interface , where one node can data to other by selecting them in dropdown. but how will someone know who is this address (adhjsd632892332bd328298382). Can I assign a label to a node or any address belongining to a node ?

How multiple issuers can issue qty for one asset ?

Wed, 12 Sep 2018 11:38:22 +0000

I Issue one asset with a particular address which have issue permission issuefrom api. Now i want other address can also issue qty to this asset. For it i give issue permission to new address and try Issuemorefrom api with this new address but multichaingives me error "Issuing more units of this asset not allowed from this address" but this address have issue permissions.

information about multisigaddress' addresses

Tue, 04 Sep 2018 13:51:50 +0000

Hi,

I would like to get the corresponding (single-signature-)addresses of a given multisigaddress. getaddresses true shows only the individual addresses if the multisigaddress was generated at the node with the pubkeys via addmultisigaddress. They are not shown when imported via importaddress.

importaddress and then getaddresses true gives me "addresses":[] - an empty list.

Is there any possibility for a node to get the addresses of any multisigaddress?

Using addmultisigaddress requires the pubkeys. So if the solution is to use addmultisigaddress with the pubkeys isn't really a solution because I don't know the addresses to ask for their pubkeys...

Thank you for enlightenment!

zolar

Can not get all list wallet addresses

Thu, 30 Aug 2018 09:05:01 +0000

Hello,

I have a question when I call: getaddresses in Multichain.

I have 2 nodes multichain. (2 nodes are running)

In the Node 1, I back up file: "wallet.dat" and folder: "wallet" and I restore it to Node 2.

In the Node 2, I call function: "getaddresses", but when I check list address in Node 2. It's old addresses and different list wallet address in node 1.

I have to stop and re-start multichain node 2. Then, I check list wallet address again. It's updated and same with list wallet addresses in Node 1.

So, How to update the wallet address list in node 2 without restart multichain in Node 2?

pls help me,

thank you so much.

How to feed a transaction with metadata as an input to next transaction?

Tue, 21 Aug 2018 09:14:43 +0000

Scenario: I want to design a supply chain model where in each Transaction I/p should be feed from previous Transaction.

I am able to successfully execute the first transaction taking an unspent I/p transaction & generating an o/p transaction having inline data -

streamchain: listwallettransactions 1
{"method":"listwallettransactions","params":[1],"id":1,"chain_name":"streamchain"}

[
    {
        "balance" : {
            "amount" : 0,
            "assets" : [
            ]
        },
        "myaddresses" : [
            "1EvCWA6RhJohvhMAtTkssx3FFhJs1N5AB56Hh3",
            "1QevGxyWXDCcP6z4VXLy8oyULnZKRfb4tSRvqv"
        ],
        "addresses" : [
        ],
        "permissions" : [
        ],
        "items" : [
        ],
        "data" : [
            {
                "text" : "Requested"
            }
        ],
        "confirmations" : 11,
        "blockhash" : "00cc8adb2f271239a2797b1014bae560300fdf42faacc8eea288c2a94ba3dd22",
        "blockindex" : 1,
        "blocktime" : 1534831625,
        "txid" : "0572612f079f29e6d2a0e286e080a5a27fb2a8df7ca995913c00c741eac4f301",
        "valid" : true,
        "time" : 1534831606,
        "timereceived" : 1534831606
    }
]

Now, I want to feed this transaction i.e 0572612f079f29e6d2a0e286e080a5a27fb2a8df7ca995913c00c741eac4f301 as an input for next transaction.

So. I am creating another transaction taking this as input & I want to transfer the asset to another address.

createrawtransaction '[{"txid":"0572612f079f29e6d2a0e286e080a5a27fb2a8df7ca995913c00c741eac4f301","vout":1}]' '{"1UdP6xqz3SuK5MfeT1DPaPG2iwZwP5Dvzq2UMG":{"assetproduct":1}}'

appendrawdata 010000000101f3c4ea41c7003c9195a97cdfa8b27fa2a580e086e2a0d2e6299f072f6172050100000000ffffffff0100000000000000003776a914cc697bdd8617017860ecfe7aa888d13413cfd1ae88ac1c73706b714956b57af4ef691e74b3b63cbd232d7c01000000000000007500000000 '{"text":"Available"}'

streamchain: signrawtransaction 010000000101f3c4ea41c7003c9195a97cdfa8b27fa2a580e086e2a0d2e6299f072f6172050100000000ffffffff0200000000000000003776a914cc697bdd8617017860ecfe7aa888d13413cfd1ae88ac1c73706b714956b57af4ef691e74b3b63cbd232d7c0100000000000000750000000000000000120573706b6601756a09417661696c61626c6500000000
{"method":"signrawtransaction","params":["010000000101f3c4ea41c7003c9195a97cdfa8b27fa2a580e086e2a0d2e6299f072f6172050100000000ffffffff0200000000000000003776a914cc697bdd8617017860ecfe7aa888d13413cfd1ae88ac1c73706b714956b57af4ef691e74b3b63cbd232d7c0100000000000000750000000000000000120573706b6601756a09417661696c61626c6500000000"],"id":1,"chain_name":"streamchain"}

{
"hex" : "010000000101f3c4ea41c7003c9195a97cdfa8b27fa2a580e086e2a0d2e6299f072f617205010000006a473044022001d88619cc1b1a3f3f3fce368bec017f30751b79f144ae771b62c1ea2de95dd102206d67c7a9976e14e619c4f3f4f9b121d78bedc05f0017c0eaf8dc96dd8a5210fa012103b2ccb7c2c367f77a5f0d97011ee29480523788979b1a3cb6ccdb61b7d2e22b61ffffffff0200000000000000003776a914cc697bdd8617017860ecfe7aa888d13413cfd1ae88ac1c73706b714956b57af4ef691e74b3b63cbd232d7c0100000000000000750000000000000000120573706b6601756a09417661696c61626c6500000000",
"complete" : true
}

While doing the sendrawtransaction I am getting this error -

streamchain: sendrawtransaction 010000000101f3c4ea41c7003c9195a97cdfa8b27fa2a580e086e2a0d2e6299f072f617205010000006a473044022001d88619cc1b1a3f3f3fce368bec017f30751b79f144ae771b62c1ea2de95dd102206d67c7a9976e14e619c4f3f4f9b121d78bedc05f0017c0eaf8dc96dd8a5210fa012103b2ccb7c2c367f77a5f0d97011ee29480523788979b1a3cb6ccdb61b7d2e22b61ffffffff0200000000000000003776a914cc697bdd8617017860ecfe7aa888d13413cfd1ae88ac1c73706b714956b57af4ef691e74b3b63cbd232d7c0100000000000000750000000000000000120573706b6601756a09417661696c61626c6500000000
{"method":"sendrawtransaction","params":["010000000101f3c4ea41c7003c9195a97cdfa8b27fa2a580e086e2a0d2e6299f072f617205010000006a473044022001d88619cc1b1a3f3f3fce368bec017f30751b79f144ae771b62c1ea2de95dd102206d67c7a9976e14e619c4f3f4f9b121d78bedc05f0017c0eaf8dc96dd8a5210fa012103b2ccb7c2c367f77a5f0d97011ee29480523788979b1a3cb6ccdb61b7d2e22b61ffffffff0200000000000000003776a914cc697bdd8617017860ecfe7aa888d13413cfd1ae88ac1c73706b714956b57af4ef691e74b3b63cbd232d7c0100000000000000750000000000000000120573706b6601756a09417661696c61626c6500000000"],"id":1,"chain_name":"streamchain"}

error code: -26
error message:
64: Asset transfer script rejected - mismatch in input/output quantities

Please help me out.

burn address balances

Tue, 14 Aug 2018 15:39:46 +0000

I am trying to calculate the 'net' available amount of an asset (listassets - amount burnt).

Is there a way to get the burn address' balances?

How a vout (and particularly scriptPubKey) works ?

Thu, 05 Jul 2018 14:29:25 +0000

Hello !

I've some questions about the vout of a transaction, and to be more precise, about scriptPubKey.

As I can see, a typical output transaction looks like this :

{
            "value" : 0.00000000,
            "n" : 1,
            "scriptPubKey" : {
                "asm" : "OP_DUP OP_HASH160 eadb51503d0c15d2d36c3354dd0bfeb63ec4b91b OP_EQUALVERIFY OP_CHECKSIG 73706b67c166070000000000 OP_DROP",
                "hex" : "76a914eadb51503d0c15d2d36c3354dd0bfeb63ec4b91b88ac0c73706b67c16607000000000075",
                "reqSigs" : 1,
                "type" : "pubkeyhash",
                "addresses" : [
                    "1Yk36JuVbQuyr1y5uSJQDLfvnCxpHSi3WNsSgg"
                ]
            },
            "assets" : [
                {
                    "name" : "asset-lot@kjlppp",
                    "issuetxid" : "17b6762b2f5752e224bcd302852d40b68443c04a2bb68d71c473ac4355da30a3",
                    "assetref" : "86-491-46615",
                    "qty" : 485.05700000,
                    "raw" : 485057,
                    "type" : "issuefirst"
                }
            ],
            "permissions" : [
            ],
            "items" : [
            ]
        }

When seeing this, some questions pop out of my mind :

- What is exactly the purpose of scriptPubKey ?

- What is the 'addresses' field in scriptPubKey ? How can it happen to have more than one address on the list ? How the addresses in this field are chosen ?

- Is it possible to clearly identify in a transaction vout to which address an asset (from the assets list) is sent ?

Thank you very much for the answers !

External data source for initial balance

Thu, 21 Jun 2018 17:05:57 +0000

Hi MC team

I need to set up an "inittial balance" in an multichain address , but this balance needs to be initialized or queried from an external source , how can this be done considering that only an initial block reward or an internal transfer of fund seems to be the only way to change the original zero balance of an address by default , any idea?

Best regards.

How to derive public key of wallet address?

Thu, 14 Jun 2018 12:42:13 +0000

Hi,

How can I get the public key for a wallet address? The purpose is I want to encrypt something using the recipient's public key which he can presumably decrypt since he has his private key.

I can see that getaddresses api call with verbose=true shows the pubkey for each address, but this is only for addresses stored in the current node's wallet. What if the address is from another node?

Thanks

How do you pass the node's wallet address to a master node in order to grant permission to this new node

Wed, 06 Jun 2018 08:55:43 +0000

Hello, I'm facing a problem

All the usage of Multichain when all node are well configured is fine.

But every time when a new node join the network, we need to grant some permissions needed by this new node. How do you do this process offchain ?

(on the getting started :

"Back on the first server, add connection permissions for this address:

multichain-cli chain1 grant wallet_adress connect"

If we configure the chain with anyone-can-* we are facing the

No unspent outputs are available problem and we can solve this by some other node sending

a zero quantity but this operation need the wallet address )

Do you pass this address by mail ? SMS ? delivery boy ? CTRL + C CTRL + V ? Is there a specific workflow to garanty this address ?

Cordially

How to use Multichain's one wallet for multiple addresses

Wed, 23 May 2018 18:23:17 +0000

Disclaimer: I run a small network (3-5 nodes) and want to use it for data-only purposes. My current idea is to create a stream per entity and then just chain transactions related to an entity in their corresponding stream.

A few questions:

1. As I understand, Multichain provides one default wallet which has an address per each node, and doesn't provide multiple wallets functionality. So, if I want to have multiple wallets, then I need to have some kind of a wallet-supporting app on the frontend and then under the hood connect each wallet to an address in my Multichain network?

2. But when I create a new address with getnewaddress it is only present in the node on which I created it, and is not being shared. What is the use case here? I am a bit confused.

3. If I want to have different streams per user (system user on the business side, but not RPC API user), then does it make sense to simulate a "user" as an address? But then, since the addresses are not shared among the network... should I just stick to "a stream per user"?

what is the type of built-in wallet deterministic wallet or nondeterministic wallet ?

Mon, 16 Apr 2018 19:03:55 +0000

also I need to know if there is any way to make addresses globally identified in each node once the creation rather than identified in only the node where I create it and import address one by one in each node ?

Addresses in the Network

Mon, 16 Apr 2018 07:14:22 +0000

Is it possible for the addresses in the network (on Node1, Node2 ...NodeN) to be independent for transaction even if specific Node(from which it is created) staying online or offline for the execution of transaction?

And How to know who exactly mined the block?

Understanding Working of Nodes

Mon, 16 Apr 2018 07:07:31 +0000

On one node and 2 new addresses are given permissions to send and receive only. Will there be any possibility for Transaction to work if the node is Down?

Can I search all transactions done by an address that is not in my wallet?

Mon, 09 Apr 2018 11:05:14 +0000

Hi,

I am trying to build something using multichain. What I need is a way to query the blockchain and return all the transactions done by an address. I am not using streams. I am using a Bitcoin style blockchain.

External Keys Multisignature

Thu, 05 Apr 2018 22:28:14 +0000

I created a multisignature address using external keys. But when I am trying to sign the raw transaction it does not seems to complete.

After createrawtransaction I use signrawtransaction here is my sample command

multichain-cli MyChain signrawtransaction [hex-blob] '[]' '[PrivateKey1, PrivateKey2]'

At first I tried using PrivateKey1 only but it still the same.

Can you help me with my case?

Thank you very much!

External key management

Wed, 14 Mar 2018 03:03:17 +0000

I tried the guide for external key management. And I have a questions in mind for it.

Can we just deploy one node of Multichain and use External Key for other users to transact?

I'm trying to implement by using one Server node (or more) and some users will be just using external key to access the Blockchain. Is that possible?

Set output address for mining rewards?

Mon, 26 Feb 2018 22:44:12 +0000

How can you set an address to send all rewards from mining to?

How to get total transaction, total input and total output

Mon, 26 Feb 2018 04:49:28 +0000

Hello multichain dev,

I want create explorer multichain explorer like blockchain.info, but i confused how to get total transaction, total input and total output asset transaction on multichain address.

Thanks

Address and priv key longitude?

Fri, 16 Feb 2018 10:28:06 +0000

Hi, I've read this article https://www.multichain.com/developers/address-key-format/ and I don't have clear how long is a public address and a private key. By what I understood, I think the public address is 65 bytes and the private key is 41 bytes, but I find those numbers rare

Connecting to a AWS instance of multichain in bitcoin style

Wed, 14 Feb 2018 03:16:34 +0000

Hi Multichain Team

I have installed an multichain instance in amazon AWS (attach params.dat just relevant parameters below) , I have a MSigna wallet used normally for bitcoin , the problem is this wallet doesnt connects to multichain even when I have configured the chain in bitcoin mode , the wallet keeps on trying to connect and only shows connecting but never does it! What can it be? P:D No native assets just native currency requiered.

Thanks in advance

# ==== MultiChain configuration file ====

# Created by multichain-util
# Protocol version: 10009

# This parameter set is VALID.
# To join network please run "multichaind ecupaybeta2".

# The following parameters can only be edited if this file is a prototype of another configuration file.
# Please run "multichain-util clone ecupaybeta2 <new-network-name>" to generate new network.

# Basic chain parameters

chain-protocol = bitcoin                # Chain protocol: multichain (permissions, native assets) or bitcoin
chain-description = MultiChain ecupaybeta # Chain description, embedded in genesis block coinbase, max 90 chars.
root-stream-name = root                 # Root stream name, blank means no root stream.
root-stream-open = true                 # Allow anyone to publish in root stream
chain-is-testnet = false                # Content of the 'testnet' field of API responses, for compatibility.
target-block-time = 15                  # Target time between blocks (transaction confirmation delay), seconds. (2 - 86400)
maximum-block-size = 8388608            # Maximum block size in bytes. (1000 - 1000000000)

# Global permissions

anyone-can-connect = true               # Anyone can connect, i.e. a publicly readable blockchain.
anyone-can-send = true                  # Anyone can send, i.e. transaction signing not restricted by address.
anyone-can-receive = true               # Anyone can receive, i.e. transaction outputs not restricted by address.
anyone-can-receive-empty = true         # Anyone can receive empty output, i.e. without permission grants, asset transfers and zero native currency.
anyone-can-create = false               # Anyone can create new streams.
anyone-can-issue = false                # Anyone can issue new native assets.
anyone-can-mine = true                  # Anyone can mine blocks (confirm transactions).
anyone-can-activate = false             # Anyone can grant or revoke connect, send and receive permissions.
anyone-can-admin = false                # Anyone can grant or revoke all permissions.
support-miner-precheck = true           # Require special metadata output with cached scriptPubKey for input, to support advanced miner checks.
allow-arbitrary-outputs = false         # Allow arbitrary (without clear destination) scripts.
allow-p2sh-outputs = true               # Allow pay-to-scripthash (P2SH) scripts, often used for multisig. Ignored if allow-arbitrary-outputs=true.
allow-multisig-outputs = true           # Allow bare multisignature scripts, rarely used but still supported. Ignored if allow-arbitrary-outputs=true.

# Defaults for node runtime parameters

lock-admin-mine-rounds = 10             # Ignore forks that reverse changes in admin or mine permissions after this many mining rounds have passed. Integer only. (0 - $
mining-requires-peers = true            # Nodes only mine blocks if connected to other nodes (ignored if only one permitted miner).
mine-empty-rounds = 10                  # Mine this many rounds of empty blocks before pausing to wait for new transactions. If negative, continue indefinitely (ignore$
mining-turnover = 0.5                   # Prefer pure round robin between a subset of active miners to minimize forks (0.0) or random equal participation for all permi$

# Native blockchain currency (likely not required)

initial-block-reward = 1000000          # Initial block mining reward in raw native currency units. (0 - 1000000000000000000)
first-block-reward = -1                 # Different mining reward for first block only, ignored if negative. (-1 - 1000000000000000000)
reward-halving-interval = 52560000      # Interval for halving of mining rewards, in blocks. (60 - 1000000000)
reward-spendable-delay = 1              # Delay before mining reward can be spent, in blocks. (1 - 100000)
minimum-per-output = 0                  # Minimum native currency per output (anti-dust), in raw units.
                                        # If set to -1, this is calculated from minimum-relay-fee. (-1 - 1000000000)
maximum-per-output = 100000000000000    # Maximum native currency per output, in raw units. (0 - 1000000000000000000)
minimum-relay-fee = 0                   # Minimum transaction fee, per 1000 bytes, in raw units of native currency. (0 - 1000000000)
native-currency-multiple = 10           # Number of raw units of native currency per display unit. (0 - 1000000000)

only-accept-std-txs = true              # Only accept and relay transactions which qualify as 'standard'.
max-std-tx-size = 4194304               # Maximum size of standard transactions, in bytes. (1024 - 100000000)
max-std-op-returns-count = 10           # Maximum number of OP_RETURN metadata outputs in standard transactions. (0 - 1024)
max-std-op-return-size = 2097152        # Maximum size of OP_RETURN metadata in standard transactions, in bytes. (0 - 67108864)
max-std-op-drops-count = 5              # Maximum number of OP_DROPs per output in standard transactions. (0 - 100)
max-std-element-size = 8192             # Maximum size of data elements in standard transactions, in bytes. (128 - 32768)
# The following parameters were generated by multichain-util.
# They SHOULD ONLY BE EDITED IF YOU KNOW WHAT YOU ARE DOING.

default-network-port = 8300             # Default TCP/IP port for peer-to-peer connection with other nodes.
default-rpc-port = 2654                 # Default TCP/IP port for incoming JSON-RPC API requests.
chain-name = ecupaybeta2                # Chain name, used as first argument for multichaind and multichain-cli.
protocol-version = 10009                # Protocol version at the moment of blockchain genesis.
network-message-start = f9beb4d9        # Magic value sent as the first 4 bytes of every peer-to-peer message.
address-pubkeyhash-version = 00         # Version bytes used for pay-to-pubkeyhash addresses.
address-scripthash-version = 05         # Version bytes used for pay-to-scripthash addresses.
private-key-version = 80                # Version bytes used for exporting private keys.
address-checksum-value = 00000000       # Bytes used for XOR in address checksum calculation.

Multiple users in one node

Tue, 06 Feb 2018 10:40:17 +0000

Hi, I'm new to Multichain so I'm sorry if some of my questions have an obvious answer ...

I'm developing a mobile application that give points to the users (if they have the merits needed) and they can spend them in another application. In my case, when a user registers in the app they are added to the blockchain and given an address and a private key, being their phone the node from where they are registering. My intention is to store the address and private key in a external system along with the other information from the registration process. So, here go my questions:

1) I have understood that it is possible that, in my case, for each user that registers from the same phone I can give them different addresses and private keys. Is that correct?

2) Let's say a registered user uses another phone (and, therefor, access the blockchain from another node) and logins in the app. Can the address and private key associated with that user (stored in the external system) be used in this new phone?

Thank you in advance

Enforce address regex requirement for permissions

Sat, 03 Feb 2018 00:56:01 +0000

I want to make a semi-open blockchain. Anyone will be able to connect and read streams (I'm using JSON streams as a public database) but I want to limit users who can write to and mine the blockchain. I only want users who's address matches a specific regex expression getting granted appropriate permissions. For example, if their address starts with 1mine, the address is granted permission to mine. If it starts with 1json they are granted the send, receive, and create (for JSON streams) permissions. Looking at https://www.multichain.com/developers/address-key-format/ MultiChain’s addresses and private keys can be fully compatible with Bitcoin’s. Can I use a Bitcoin address generator like https://github.com/exploitagency/vanitygen-plus to generate the needed addresses and private keys and import them into Multichain? The idea is that users would have to spend resources to earn an address that's capable of mining or writing to the shared JSON database (hashcash).

I don't want users submitting addresses they don't have the private key for, so I'm going to require users use signmessage and I'll use verifymessage to prove they really have a valid public/private key pair. The verification and permission granting will be done with a script on a central server.