# 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 the seeding .json file
  -c, --contracts-version <version>  polymath protocol version to launch (2.1.0, 3.0.0, 3.1.0)
  -b, --big                          use big seed data (overrides -s option)
  -r, --registry-addresses           output the Polymath Registry address for each version
  -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 three local blockchains, for versions 2.1.0, 3.0.0 and 3.1.0. These blockchain states are stored in `blockchain-state/2.1.0`, `blockchain-state/3.0.0` and `blockchain-state/3.1.0` respectively. The corresponding artifacts are stored in `artifacts/<version_number>`.

## 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 3.1.0 local blockchain will be loaded, but you can specify a version (3.1.0, 3.0.0 or 2.1.0) via the `-c, --contract-version` option.

Examples:
`local-blockchain -c 2.1.0`
`local-blockchain --contract-version 3.0.0`

### Polymath registry addresses (-r, --registry-addresses)

Outputs the addresses for the deployed Polymath Registry contracts in each version. Overrides all other options

Examples:
`local-blockchain -r`
`local-blockchain --registry-addresses`

### 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

```json
{
  "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
    },
    { "walletId": 8, "polyBalance": 0, "daiBalance": 0 },
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```

