Concepts
Data model
Pairs, decimals and the fields of every Tachi price.
Concepts
How prices are signed, agreed and kept fresh.
1 min read 3 sections Testnet
Pairs
Pairs are written SYMBOL/KES and SYMBOL/USD, for example SCOM/KES. The KES/USD rate is published as KES/USD.
Decimals
Every price uses 8 decimals, so a stored value is a count of 10⁻⁸ units of the quote currency. decimals() always returns 8.
Fields
struct PriceData {
- priceValue in units of 10⁻⁸ of the quote currency
- statusOpen · Closed · Halted
- observedAtOldest source observation. Judge freshness by this
- publishedAtOldest node signature time
- signersNumber of nodes that signed
- roundCounts accepted reports from 1
- sourcesFewest independent sources any signing node used
- spreadBpsHighest minus lowest node price, in basis points
}
Tip
Judge freshness by observedAt, not publishedAt. It reflects when the market data was actually seen.
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