mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-06-21 06:04:33 +00:00
b5abbfed79
- Solidity Upgraded up to v0.8.0 - Fixed and Added eth_chainId - Fix error in TransactionRecipet - Reward halving issue fixed
71 lines
2.3 KiB
Go
71 lines
2.3 KiB
Go
package vm
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import (
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"github.com/XinFinOrg/XDPoSChain/XDCx/tradingstate"
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"github.com/XinFinOrg/XDPoSChain/common"
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"github.com/XinFinOrg/XDPoSChain/log"
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"github.com/XinFinOrg/XDPoSChain/params"
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)
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const XDCXPriceNumberOfBytesReturn = 32
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// XDCxPrice implements a pre-compile contract to get token price in XDCx
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type XDCxLastPrice struct {
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tradingStateDB *tradingstate.TradingStateDB
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}
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type XDCxEpochPrice struct {
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tradingStateDB *tradingstate.TradingStateDB
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}
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func (t *XDCxLastPrice) RequiredGas(input []byte) uint64 {
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return params.XDCXPriceGas
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}
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func (t *XDCxLastPrice) Run(input []byte) ([]byte, error) {
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// input includes baseTokenAddress, quoteTokenAddress
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if t.tradingStateDB != nil && len(input) == 64 {
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base := common.BytesToAddress(input[12:32]) // 20 bytes from 13-32
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quote := common.BytesToAddress(input[44:]) // 20 bytes from 45-64
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price := t.tradingStateDB.GetLastPrice(tradingstate.GetTradingOrderBookHash(base, quote))
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if price != nil {
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log.Debug("Run GetLastPrice", "base", base.Hex(), "quote", quote.Hex(), "price", price)
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return common.LeftPadBytes(price.Bytes(), XDCXPriceNumberOfBytesReturn), nil
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}
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}
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return common.LeftPadBytes([]byte{}, XDCXPriceNumberOfBytesReturn), nil
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}
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func (t *XDCxLastPrice) SetTradingState(tradingStateDB *tradingstate.TradingStateDB) {
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if tradingStateDB != nil {
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t.tradingStateDB = tradingStateDB.Copy()
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} else {
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t.tradingStateDB = nil
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}
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}
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func (t *XDCxEpochPrice) RequiredGas(input []byte) uint64 {
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return params.XDCXPriceGas
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}
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func (t *XDCxEpochPrice) Run(input []byte) ([]byte, error) {
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// input includes baseTokenAddress, quoteTokenAddress
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if t.tradingStateDB != nil && len(input) == 64 {
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base := common.BytesToAddress(input[12:32]) // 20 bytes from 13-32
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quote := common.BytesToAddress(input[44:]) // 20 bytes from 45-64
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price := t.tradingStateDB.GetMediumPriceBeforeEpoch(tradingstate.GetTradingOrderBookHash(base, quote))
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if price != nil {
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log.Debug("Run GetEpochPrice", "base", base.Hex(), "quote", quote.Hex(), "price", price)
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return common.LeftPadBytes(price.Bytes(), XDCXPriceNumberOfBytesReturn), nil
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}
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}
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return common.LeftPadBytes([]byte{}, XDCXPriceNumberOfBytesReturn), nil
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}
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func (t *XDCxEpochPrice) SetTradingState(tradingStateDB *tradingstate.TradingStateDB) {
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if tradingStateDB != nil {
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t.tradingStateDB = tradingStateDB.Copy()
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} else {
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t.tradingStateDB = nil
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}
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}
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