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Creating Transaction

A transaction is a digitally signed instruction that tells the ParallelChain state machine to execute a sequence of commands. There are different kinds of Commands in ParallelChain protocol.

pchain_client accepts transaction in json format. This section will demonstrate how to prepare your transaction file and submit it with your account keys.

Prepare Transaction File

pchain_client provides user-friendly way to prepare your transaction file without prior knowledge of JSON (JavaScript Object Notation) format. The transaction file consists of 2 parts: Parameters and Subcommand.

Here are some CLI subcommands to indicate corresponding Protocol Transaction Command.

Subcommand Action Description
transfer Transfer balance from transaction signer to recipient
deploy Deploy smart contract to the state of the blockchain
call Trigger method call of a deployed smart contract
deposit Deposit some balance into the network account
create Instantiation of a Deposit of an existing Pool
top-up Increase balance of an existing Deposit
withdraw Withdraw balance from an existing Deposit
update-settings Update settings of an existing Deposit
stake Stake to a particular pool
stake Increase stakes to an existing Pool
unstake Remove stakes from an existing Pool
pool Create and manage Pool
create Instantiation of a Pool in the network account
update-settings Update settings of an existing Pool
delete Delete an existing Pool in the network account

Create New Transaction File

Transaction in ParallelChain protocol specifies a set of parameters included in the instruction. You don't need to provide all parameters, some of them would be computed and filled in automatically when you submit the transaction.

./pchain_client transaction create --help
./pchain_client.exe transaction create --help

First, provide the following 4 parameters:

./pchain_client transaction create \
  --nonce <NONCE> \
  --gas-limit <GAS_LIMIT> \
  --max-base-fee-per-gas <MAX_BASE_FEE_PER_GAS> \
  --priority-fee-per-gas <PRIORITY_FEE_PER_GAS> \
...
./pchain_client.exe transaction create `
  --nonce <NONCE> `
  --gas-limit <GAS_LIMIT> `
  --max-base-fee-per-gas <MAX_BASE_FEE_PER_GAS> `
  --priority-fee-per-gas <PRIORITY_FEE_PER_GAS> `
...

Then, decide the transaction type using the CLI subcommand. Each of them takes different inputs. You can always check the help menu using --help.

Make sure you provide both Parameters and Subcommand parts in one command. The output transaction file (tx.json) will be saved in the current directory. You can also specify the designated file with the flag --destination

Example - Transfer tokens:

./pchain_client transaction create \
  --nonce 0 \
  --gas-limit 100000 \
  --max-base-fee-per-gas 8 \
  --priority-fee-per-gas 0 \
  transfer \
    --recipient kRPL8cXI73DNgVSSQz9WfIi-mAAvFvdXKfZ9UPBEv_A \
    --amount 100
./pchain_client.exe transaction create `
  --nonce 0 `
  --gas-limit 100000 `
  --max-base-fee-per-gas 8 `
  --priority-fee-per-gas 0 `
  transfer `
    --recipient kRPL8cXI73DNgVSSQz9WfIi-mAAvFvdXKfZ9UPBEv_A `
    --amount 100

Example - Deploy contract and save to designated file deposit-tx.json:

./pchain_client transaction create \
--destination ~/Documents/deposit-tx.json \
--nonce 0 \
--gas-limit 100000 \
--max-base-fee-per-gas 8 \
--priority-fee-per-gas 0 \
deploy \
  --contract-code /home/document/code.wasm \
  --cbi-version 0
./pchain_client.exe transaction create `
--destination ~/Documents/deposit-tx.json `
--nonce 0 `
--gas-limit 100000 `
--max-base-fee-per-gas 8 `
--priority-fee-per-gas 0 `
deploy `
  --contract-code /home/document/code.wasm `
  --cbi-version 0

Append Command to Existing File

As explained in the beginning of Transaction section, Transaction in ParallelChain protocol accepts sequence of commands. But you may find that transaction create in previous section only support a single Command in Transaction.

If you want to support multiple Commands, use the following command with the subcommand. This appends a Command element to the back of the command array in Transaction. Please note that commands in array will be executed in sequential order.

Example:

./pchain_client transaction append \
--file ~/Documents/deposit-tx.json \
transfer \
  --recipient kRPL8cXI73DNgVSSQz9WfIi-mAAvFvdXKfZ9UPBEv_A \
  --amount 100
./pchain_client.exe transaction append `
--file ~/Documents/deposit-tx.json `
transfer `
  --recipient kRPL8cXI73DNgVSSQz9WfIi-mAAvFvdXKfZ9UPBEv_A `
  --amount 100

Submit Transaction to ParallelChain

After preparing the transaction json file, you can now submit the transaction with keypair.

Example:

./pchain_client transaction submit \
--file <FILE> \
--keypair-name <KEYPAIR_NAME>
./pchain_client.exe transaction submit `
--file <FILE> `
--keypair-name <KEYPAIR_NAME>

You will get a response like the following example if the transaction is accepted by your provider.

{
  "API Response:": "Your Transaction has been received.",
  "Command(s):": [
    {
      "Deploy":
      {
        "cbi_version": 0,
        "contract": "<contract in 53476 bytes>"
      }
    }
  ],
  "Contract Address:": "EH-0Im5Pb5mZQumIP6AAxyqTU7fBWQsNfLdGfaBh8AE",
  "Signature:": "DdRr2l-f3SwWtQP7M5JKdOUEvIb-th2mBrV1z06dkvB2rpp0qKQZwBBzJBh8czCqplUsmzSlSjPNrvOQbx2jAA",
  "Transaction Hash:": "POikFlLT8sVuVt3RHJvxmzPKP8dfvi55TrME6Muc80I"
}