# Prime

Make Your Own Prime Token

You can deploy your own Prime Token on the Rinkeby network using our deployer (what are deployers?)

Deploy Your Own Prime Token

# Introduction

Blockwell Prime is a multi-functional ERC20 compatible token. It has many advanced features, but Prime can also be used as just a basic token. You can always take advantage of the features later on.

# Features

# ERC-20

The token is fully ERC-20 compliant.

# Approve and Transfer From

One aspect of ERC-20 that is not well-known is approvals and transfer from, so here is a short explanation.

Approve lets you give another user permission to use your tokens from your wallet. You give a specific limit on how much they can use, and then they can transfer tokens from your wallet to any wallet. This special transfer is called Transfer From.

For example, I could approve John to spend 100 of my tokens. John can then use Transfer From to send up to 100 tokens from my wallet directly to another wallet of his choosing.

Every time Transfer From is used, the amount is deducted from the total approval. For example, if John transfers 40 tokens from my wallet to Lucy, he could still send another 60 tokens to a different wallet.

Note that John never had any tokens himself, he only acted as a kind of delegate on where the tokens should go.

# Quill

Prime has Blockwell Quill.

# User Roles

There are four main user roles that can be assigned: Admin, Attorney, Bundler, and Whitelist.

# Admin

An admin can do most things on the token, with exceptions only with regards to pausing. Specifically, an admin cannot unpause the token if an attorney has paused it, and most features cannot be used when the token is paused. For full details see Pause below.

Admins can be added by other Admins and Attorneys.

# Attorney

An Attorney has basically all the same powers as an Admin, except with regards to pausing. See Pause below for details.

Attorneys can be added by Admins and other Attorneys.

# Bundler

A Bundler is allowed to use the multiTransfer and multiTransferFrom functions, which lets them distribute tokens.

Bundlers can be added by Admins and Attorneys.

# Whitelist

A Whitelisted user is allowed to transfer tokens even if the token is locked. They have no further powers.

Users can be Whitelisted by Admins and Attorneys.

# Bw Admin

There is a special role for a Blockwell Admin account. The only powers the BW Admin has is they can reinstate Admins and Attorneys in case of emergencies where control of the token has been lost due to a security breach or abuse of power. This power circumvents Pause, locks and other controls.

This account will never be used without the consent of the business the token belongs to.

# Token Lock

The token has a lock mechanism that prevents normal users from using their tokens.

The lock is time-based, when the lock expires the token is opened up for general use. The initial time is set when the token is deployed, but it can also be changed by an Admin or an Attorney.

The following functionality is disabled when the token is locked:

  • transfer Transfer of tokens approve Approving wallets to transfer your
  • tokens transferFrom Transferring from approved wallets createBrandToken Is
  • disabled indirectly because transfer is required for it

There are some exceptions as well:

  • An Admin, Attorney, or Whitelisted user is not affected by the lock Multi
  • transfer functionality circumvents locks, but is only usable by Bundlers

# Freeze

Individual accounts can be frozen, which prevents them from interacting with the token. Specifically:

  • Cannot send or receive tokens by any means, not even multi transfer Cannot
  • approve wallets for tokens

Admins and Attorneys can freeze and unfreeze accounts. In addition to using it on a single account, multiFreeze and multiUnfreeze functions exist for efficiency.

# Pause

The whole token can be paused to prevent almost all activity. Pausing can be done by Admins and Attorneys.


  • Prevents all token transfers, including multi transfers Prevents changing
  • token approvals Prevents Admins and Attorneys from being added and removed If
  • the Pause was initiated by an Attorney, an Admin cannot unpause

A few things can still be done:

  • Freezing and unfreezing Adding to and removing from Whitelist Adding and
  • removing Bundlers Modifying profile and shop data

# Multi Transfer

The token has two functions for making multiple transfers at the same time: multiTransfer and multiTransferFrom.

This functionality makes it much faster to distribute tokens, and it saves almost 50% on gas costs compared to individual transfers when sending to more than 5 or so addresses.

Only Bundlers can use these two functions, and both functions ignore the Token Lock. This means it can be used to distribute tokens while it's still locked, but only users added as Bundlers can do it.

multiTransfer transfers tokens directly from the Bundler's token balance, it is equivalent to using a regular transfer multiple times.

multiTransferFrom transfers tokens from another wallet that the Bundler has approval for. The Bundler doesn't have the tokens, they're essentially just directing the tokens to their destination. This is equivalent to using transferFrom multiple times.

With both of these functions, special logic is used if any of the recipients are currently Frozen. Since frozen accounts cannot receive tokens, they are skipped. When this skipping happens, the contract emits an event called MultiTransferPrevented, so that you can know when it happens. The event contains the sender, recipient, and the amount of tokens.

# Suggestions and Voting

Prime includes the Suggestions feature.

# Cross-chain swapping

Prime has functions to facilitate swapping tokens across Ethereum chains. The swap relies on an external system to cross the chains, which Blockwell can provide.

A cross-chain swap is initiated using the swapToChain function that takes three arguments:

  1. chain The name of the chain to swap to (eg. "rinkeby").
  2. to The wallet address on the other chain to swap to.
  3. value The amount of tokens to swap.

Prime then does the following:

  • First, it generates a unique ID for the swap so that it can be tracked across chains for auditing.
  • Takes hold of the tokens the user wants to swap.
  • Emits a SwapToChain event with the swap's details and the generated ID.

Then, the external system picks up the SwapToChain event and calls the equivalent token on the other chain with the function swapFromChain.

The Prime contract on the other chain then does the following:

  • Transfers the specified wallet tokens from its held supply.
  • Emits a SwapFromChain event with the swap details and the matching ID generated by the original contract.

# Cross-chain swap auditability

At any point anyone can check to see if all cross-chain swaps were performed correctly by reading the SwapToChain events from one chain, and SwapFromChain events from the other. They should all have matching IDs, amounts and addresses.

# Token Distribution

Token distribution happens using the Multi Transfer functionality as described above.

There are two basic scenarios for distribution:

# Primary bundler that needs to distribute tokens

This is when a bundler is working directly with you and they haven't received any tokens.

In this case, two things need to happen to set them up for distribution:

  1. Their account needs to be added as a Bundler using addBundler.
  2. Their account needs to be approved to spend tokens equal to the amount of their distribution. This is done using approve.

Then bundler can then use multiTransferFrom to distribute the tokens directly from your supply to their list of recipients.

The major benefit to this is because the tokens aren't sent to the bundler, an incorrect wallet address or some other issue won't lead to the tokens being lost.

It also reduces the likelihood of the tokens being stolen in case of a hack on the bundler's wallet.

# Bundler who already has tokens

The above process can't be used when the user already has tokens for distribution. This is the case with sub-bundlers who received their tokens from a bundler's distribution. This also applies when you as an admin are distributing tokens directly from the main supply.

In this case, the only thing needed to set up for distribution is the account being added as a Bundler.

The bundler can then use multiTransfer to distribute the tokens.