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0g-chain/x/issuance/spec/03_messages.md
Kevin Davis e14466547d
Issuance module (#599) 
* wip: issuance module

* add keeper and module methods

* add begin blocker

* add client

* update events

* add simulations

* ignore v0.8 migration tests for now

* ignore migration tests in ci

* add test suite

* update spec to match implementation details

* add unblock method

* address review comments

* fix typos
2020-08-17 13:09:02 -04:00

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Messages

The issuer can issue new tokens using a MsgIssueTokens

// MsgIssueTokens message type used to issue tokens
type MsgIssueTokens struct {
  Sender   sdk.AccAddress `json:"sender" yaml:"sender"`
  Tokens   sdk.Coin       `json:"tokens" yaml:"tokens"`
  Receiver sdk.AccAddress `json:"receiver" yaml:"receiver"`
}

State Modifications

  • New tokens are minted from the issuance module account
  • New tokens are transferred from the module account to the receiver

The issuer can redeem (burn) tokens using MsgRedeemTokens.

// MsgRedeemTokens message type used to redeem (burn) tokens
type MsgRedeemTokens struct {
  Sender sdk.AccAddress `json:"sender" yaml:"sender"`
  Tokens sdk.Coin       `json:"tokens" yaml:"tokens"`
}

State Modifications

  • Tokens are transferred from the owner address to the issuer module account
  • Tokens are burned

Addresses can be added to the blocked list using MsgBlockAddress

// MsgBlockAddress message type used by the issuer to block an address from holding or transferring tokens
type MsgBlockAddress struct {
	Sender         sdk.AccAddress `json:"sender" yaml:"sender"`
	Denom          string         `json:"denom" yaml:"denom"`
	BlockedAddress sdk.AccAddress `json:"blocked_address" yaml:"blocked_address"`
}

State Modifications

  • The address is added to the block list, which prevents the account from holding coins of that denom
  • Tokens are sent back to the issuer

The issuer can pause or un-pause the contract using MsgChangePauseStatus

// MsgChangePauseStatus message type used by the issuer to issue new tokens
type MsgChangePauseStatus struct {
	Sender sdk.AccAddress `json:"sender" yaml:"sender"`
	Denom  string         `json:"denom" yaml:"denom"`
	Status bool           `json:"status" yaml:"status"`
}

State Modifications

  • The Paused value of the correspond asset is updated to Status.
  • Issuance and redemption are paused if Paused is false