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49 lines
1.7 KiB
Markdown
49 lines
1.7 KiB
Markdown
<!--
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order: 2
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-->
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# State
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## Parameters and genesis state
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`Paramaters` determine which markets are tracked by the pricefeed and which oracles are authorized to post prices for a given market. There is only one active parameter set at any given time. Updates to parameters can be made via on-chain parameter update proposals.
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```go
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// Params params for pricefeed. Can be altered via governance
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type Params struct {
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Markets Markets `json:"markets" yaml:"markets"` // Array containing the markets supported by the pricefeed
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}
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// Market an asset in the pricefeed
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type Market struct {
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MarketID string `json:"market_id" yaml:"market_id"`
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BaseAsset string `json:"base_asset" yaml:"base_asset"`
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QuoteAsset string `json:"quote_asset" yaml:"quote_asset"`
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Oracles []sdk.AccAddress `json:"oracles" yaml:"oracles"`
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Active bool `json:"active" yaml:"active"`
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}
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type Markets []Market
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```
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`GenesisState` defines the state that must be persisted when the blockchain stops/stars in order for the normal function of the pricefeed to resume.
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```go
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// GenesisState - pricefeed state that must be provided at genesis
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type GenesisState struct {
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Params Params `json:"params" yaml:"params"`
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PostedPrices []PostedPrice `json:"posted_prices" yaml:"posted_prices"`
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}
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// PostedPrice price for market posted by a specific oracle
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type PostedPrice struct {
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MarketID string `json:"market_id" yaml:"market_id"`
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OracleAddress sdk.AccAddress `json:"oracle_address" yaml:"oracle_address"`
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Price sdk.Dec `json:"price" yaml:"price"`
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Expiry time.Time `json:"expiry" yaml:"expiry"`
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}
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type PostedPrices []PostedPrice
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```
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