local-blockchain

Creates a ganache instance with pre-deployed contracts for multi-version development and testing

Installation: npm install -g local-blockchain

Usage: local-blockchain [options]

Options:
  -V, --version                      output the version number
  -s, --seed <path>                  Path to a seeding .json file
  -c, --contracts-version <version>  Polymath protocol version to launch (2.1, 3.0)
  -b, --big                          Use big seed data (overrides -s option)
  -h, --help                         output usage information

Updating the local blockchain

When there are changes to the smart contracts, the local blockchain state should be re-generated. For this, we have the deploy.sh script.

Running ./deploy.sh will create two local blockchains. One will have Polymath contracts version 2.1 deployed to it, and the other one will have version 3.0. These blockchain states are stored in blockchain-state/2.1 and blockchain-state/3.0 respectively. The corresponding artifacts are stored in artifacts/2.1 and artifacts/3.0

Local testing

To test locally, simply run npm install -g from the project root and then you can use the local-blockchain command from the terminal. After any modifications, npm uninstall -g from the root and npm install -g again.

Options

Contracts version (-c, --contracts-version)

By default the 3.0 local blockchain will be loaded, but you can specify a version (3.0 or 2.1) via the -c, --contract-version option.

Examples: local-blockchain -c 2.1 local-blockchain --contract-version 3.0

Big seed data (-b, --big)

Changes the default seed data to mint tokens to hundreds of wallets in order to test batch transactions. This can be done using the -b, --big option when launching the script.

Examples: local-blockchain -b local-blockchain --big

Seed JSON (-s, --seed)

You can provide a custom JSON file to seed data into the local blockchain via the -s, --seed option

Examples: local-blockchain -s ~/myCustomSeedData.json local-blockchain --seed ~/myCustomSeedData.json

The JSON file consists of a list of accounts. Each account possesses the following:

• walletId: Number between 1 and 499, maps to addresses read from wallets.json
• polyBalance: Amount of POLY the account has
• daiBalance: Amount of DAI the account has
• tokens: Array of Security Tokens owned by that account (optional)

Each Security Token in the tokens array possesses the following:

• symbol: Token Symbol
• name: Token Name
• protocolVersion: Version of the token (either "2.1" or "3.0")
• divisible: Whether the token is divisible or not
• minted: Array of shareholders to mint to (optional)
• stoData: Array of STO configurations (optional)

Each shareholder in the minted array possesses the following:

• shareholderId: Shareholder wallet id
• amount: Amount of tokens to mint to that shareholder

Each STO configuration in the stoData array possesses the following:

• type: CappedSTO or USDTieredSTO
• startTimeOffset: Amount of seconds from now until the start of the offering
• endTimeOffset: Amount of seconds from now until the end of the offering
• walletId: Id of the wallet to which the funds will be transferred
• fundRaiseTypes: Array of currencies, ETH and POLY for both STO types, DAI for the USDTieredSTO only
• cap: Amount of tokens to be sold, only for Capped STO
• rate: Amount of tokens per unit of currency, only for Capped STO
• tiers: Array of tier information, only for USDTieredSTO
• nonAccreditedLimitUSD: Investment limit for non accredited investors, only for USDTIeredSTO
• minimumInvestmentUSD: Minimum investment amount for all investors, only for USDTieredSTO
• reserveWalletId: Wallet id for unsold tokens at the end of the offering, only for USDTieredSTO

Each tier in the tiers array possesses the following:

• amount: Amount of tokens to be sold at that tier
• price: Price of the token at that tier

Example

This is the data that gets loaded by default into the local blockchain

{
  "accounts": [
    {
      "walletId": 1,
      "polyBalance": 1000000,
      "daiBalance": 1000000,
      "tokens": [
        {
          "symbol": "A0T0",
          "name": "Token 1",
          "protocolVersion": "2.1",
          "divisible": false,
          "minted": [
            {
              "shareholderId": 3,
              "amount": 1000000
            },
            {
              "shareholderId": 4,
              "amount": 2000000
            }
          ],
          "stoData": [
            {
              "type": "CappedSTO",
              "cap": 1000000,
              "rate": 10,
              "fundRaiseTypes": ["ETH"],
              "startTimeOffset": 300,
              "endTimeOffset": 86400,
              "walletId": 1
            },
            {
              "type": "USDTieredSTO",
              "tiers": [
                {
                  "amount": 1000000,
                  "price": 10
                },
                {
                  "amount": 1500000,
                  "price": 15
                }
              ],
              "nonAccreditedLimitUSD": 10000,
              "minimumInvestmentUSD": 1000,
              "walletId": 1,
              "reserveWalletId": 1,
              "fundRaiseTypes": ["ETH", "POLY"],
              "startTimeOffset": 300,
              "endTimeOffset": 86400
            }
          ]
        },
        {
          "symbol": "A0T1",
          "name": "Token 2",
          "protocolVersion": "3.0",
          "divisible": true,
          "minted": [
            {
              "shareholderId": 5,
              "amount": 1000000
            },
            {
              "shareholderId": 6,
              "amount": 2000000
            }
          ],
          "stoData": [
            {
              "type": "USDTieredSTO",
              "tiers": [
                {
                  "amount": 1000000,
                  "price": 10
                },
                {
                  "amount": 1500000,
                  "price": 15
                }
              ],
              "fundRaiseTypes": ["ETH", "POLY", "DAI"],
              "nonAccreditedLimitUSD": 10000,
              "minimumInvestmentUSD": 1000,
              "walletId": 1,
              "reserveWalletId": 1,
              "startTimeOffset": 300,
              "endTimeOffset": 86400
            }
          ]
        }
      ]
    },
    {
      "walletId": 2,
      "polyBalance": 1000000,
      "daiBalance": 1000000,
      "tokens": [
        {
          "symbol": "A1T0",
          "name": "Token 3",
          "protocolVersion": "2.1",
          "divisible": false,
          "minted": [
            {
              "shareholderId": 7,
              "amount": 1000000
            }
          ]
        },
        {
          "symbol": "A1T1",
          "name": "Token 4",
          "protocolVersion": "3.0",
          "divisible": true
        }
      ]
    },
    {
      "walletId": 3,
      "polyBalance": 1000000,
      "daiBalance": 1000000
    },
    {
      "walletId": 4,
      "polyBalance": 1000000,
      "daiBalance": 1000000
    },
    {
      "walletId": 5,
      "polyBalance": 1000000,
      "daiBalance": 1000000
    },
    {
      "walletId": 6,
      "polyBalance": 1000000,
      "daiBalance": 1000000
    },
    {
      "walletId": 7,
      "polyBalance": 1000000,
      "daiBalance": 1000000
    },
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