0g-chain/x/bep3/spec/02_state.md
Denali Marsh 6c68e41758
[R4R] bep3 module audit revisions (#505)
* most audit revisions

* remove expected income

* update begin block spec

* filter queryAtomicSwaps, add queryAssetSupplies

* update old address

* update test

* Remove legacy method

* remove legacy comment

* address PR comments

* IsValid for SwapDirection, SwapStatus

* fix rng logging

* query asset supplies

* return [64]byte from rng

* remove cross chain field from MsgCreateAtomicSwap

* move swap filtering to querier

* rename Limit field to SupplyLimit
2020-05-12 13:15:38 -07:00

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Markdown

# State
## Parameters and genesis state
`Paramaters` define the rules according to which swaps are executed. Parameter updates can be made via on-chain parameter update proposals.
```go
// Params governance parameters for bep3 module
type Params struct {
BnbDeputyAddress sdk.AccAddress `json:"bnb_deputy_address" yaml:"bnb_deputy_address"` // deputy's address on Kava
MinBlockLock int64 `json:"min_block_lock" yaml:"min_block_lock"` // minimum swap expire height
MaxBlockLock int64 `json:"max_block_lock" yaml:"max_block_lock"` // maximum swap expire height
SupportedAssets AssetParams `json:"supported_assets" yaml:"supported_assets"` // array of supported asset
}
// AssetParam governance parameters for each asset within a supported chain
type AssetParam struct {
Denom string `json:"denom" yaml:"denom"` // name of the asset
CoinID int `json:"coin_id" yaml:"coin_id"` // internationally recognized coin ID
Limit sdk.Int `json:"limit" yaml:"limit"` // asset supply limit
Active bool `json:"active" yaml:"active"` // denotes if asset is active or paused
}
```
`GenesisState` defines the state that must be persisted when the blockchain stops/restarts in order for normal function of the bep3 module to resume.
```go
// GenesisState - all bep3 state that must be provided at genesis
type GenesisState struct {
Params Params `json:"params" yaml:"params"`
AtomicSwaps AtomicSwaps `json:"atomic_swaps" yaml:"atomic_swaps"`
AssetSupplies AssetSupplies `json:"assets_supplies" yaml:"assets_supplies"`
}
```
## Types
```go
// AtomicSwap contains the information for an atomic swap
type AtomicSwap struct {
Amount sdk.Coins `json:"amount" yaml:"amount"`
RandomNumberHash tmbytes.HexBytes `json:"random_number_hash" yaml:"random_number_hash"`
ExpireHeight int64 `json:"expire_height" yaml:"expire_height"`
Timestamp int64 `json:"timestamp" yaml:"timestamp"`
Sender sdk.AccAddress `json:"sender" yaml:"sender"`
Recipient sdk.AccAddress `json:"recipient" yaml:"recipient"`
SenderOtherChain string `json:"sender_other_chain" yaml:"sender_other_chain"`
RecipientOtherChain string `json:"recipient_other_chain" yaml:"recipient_other_chain"`
ClosedBlock int64 `json:"closed_block" yaml:"closed_block"`
Status SwapStatus `json:"status" yaml:"status"`
Direction SwapDirection `json:"direction" yaml:"direction"`
}
// SwapStatus is the status of an AtomicSwap
type SwapStatus byte
const (
NULL SwapStatus = 0x00
Open SwapStatus = 0x01
Completed SwapStatus = 0x02
Expired SwapStatus = 0x03
)
// SwapDirection is the direction of an AtomicSwap
type SwapDirection byte
const (
INVALID SwapDirection = 0x00
Incoming SwapDirection = 0x01
Outgoing SwapDirection = 0x02
)
// AssetSupply contains information about an asset's supply
type AssetSupply struct {
Denom string `json:"denom" yaml:"denom"`
IncomingSupply sdk.Coin `json:"incoming_supply" yaml:"incoming_supply"`
OutgoingSupply sdk.Coin `json:"outgoing_supply" yaml:"outgoing_supply"`
CurrentSupply sdk.Coin `json:"current_supply" yaml:"current_supply"`
Limit sdk.Coin `json:"limit" yaml:"limit"`
}
```