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opr.go
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opr.go
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package node
import (
"context"
"database/sql"
"fmt"
"github.com/Factom-Asset-Tokens/factom"
"github.com/pegnet/pegnet/modules/grader"
)
func (d *Pegnetd) Grade(ctx context.Context, block *factom.EBlock) (grader.GradedBlock, error) {
if block == nil {
// TODO: Handle the case where there is no opr block.
// Must delay conversions if this happens
return nil, nil
}
if *block.ChainID != OPRChain {
return nil, fmt.Errorf("trying to grade a non-opr chain")
}
ver := uint8(1)
if block.Height >= GradingV2Activation {
ver = 2
}
if block.Height >= PEGFreeFloatingPriceActivation {
ver = 3
}
var prevWinners []string = nil
prev, err := d.Pegnet.SelectPreviousWinners(ctx, block.Height)
// assume that error means it's below genesis for now
if err != nil {
if err != sql.ErrNoRows {
return nil, err
}
} else {
prevWinners = prev
}
g, err := grader.NewGrader(ver, int32(block.Height), prevWinners)
if err != nil {
return nil, err
}
for _, entry := range block.Entries {
extids := make([][]byte, len(entry.ExtIDs))
for i := range entry.ExtIDs {
extids[i] = entry.ExtIDs[i]
}
// ignore bad opr errors
err = g.AddOPR(entry.Hash[:], extids, entry.Content)
if err != nil {
// This is a noisy debug print
// log.WithError(err).WithFields(log.Fields{"hash": entry.Hash.String()}).Debug("failed to add opr")
}
}
return g.Grade(), nil
}