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report_codec.go
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report_codec.go
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package reportcodec
import (
"errors"
"fmt"
"math/big"
pkgerrors "github.com/pkg/errors"
ocrtypes "github.com/smartcontractkit/libocr/offchainreporting2plus/types"
reportcodec "github.com/smartcontractkit/chainlink-relay/pkg/reportingplugins/mercury/v2"
"github.com/smartcontractkit/chainlink/v2/core/logger"
"github.com/smartcontractkit/chainlink/v2/core/services/relay/evm/mercury/utils"
reporttypes "github.com/smartcontractkit/chainlink/v2/core/services/relay/evm/mercury/v2/types"
)
var ReportTypes = reporttypes.GetSchema()
var maxReportLength = 32 * len(ReportTypes) // each arg is 256 bit EVM word
var zero = big.NewInt(0)
var _ reportcodec.ReportCodec = &ReportCodec{}
type ReportCodec struct {
logger logger.Logger
feedID utils.FeedID
}
func NewReportCodec(feedID [32]byte, lggr logger.Logger) *ReportCodec {
return &ReportCodec{lggr, feedID}
}
func (r *ReportCodec) BuildReport(rf reportcodec.ReportFields) (ocrtypes.Report, error) {
var merr error
if rf.BenchmarkPrice == nil {
merr = errors.Join(merr, errors.New("benchmarkPrice may not be nil"))
}
if rf.LinkFee == nil {
merr = errors.Join(merr, errors.New("linkFee may not be nil"))
} else if rf.LinkFee.Cmp(zero) < 0 {
merr = errors.Join(merr, fmt.Errorf("linkFee may not be negative (got: %s)", rf.LinkFee))
}
if rf.NativeFee == nil {
merr = errors.Join(merr, errors.New("nativeFee may not be nil"))
} else if rf.NativeFee.Cmp(zero) < 0 {
merr = errors.Join(merr, fmt.Errorf("nativeFee may not be negative (got: %s)", rf.NativeFee))
}
if merr != nil {
return nil, merr
}
reportBytes, err := ReportTypes.Pack(r.feedID, rf.ValidFromTimestamp, rf.Timestamp, rf.NativeFee, rf.LinkFee, rf.ExpiresAt, rf.BenchmarkPrice)
return ocrtypes.Report(reportBytes), pkgerrors.Wrap(err, "failed to pack report blob")
}
func (r *ReportCodec) MaxReportLength(n int) (int, error) {
return maxReportLength, nil
}
func (r *ReportCodec) ObservationTimestampFromReport(report ocrtypes.Report) (uint32, error) {
decoded, err := r.Decode(report)
if err != nil {
return 0, err
}
return decoded.ObservationsTimestamp, nil
}
func (r *ReportCodec) Decode(report ocrtypes.Report) (*reporttypes.Report, error) {
return reporttypes.Decode(report)
}
func (r *ReportCodec) BenchmarkPriceFromReport(report ocrtypes.Report) (*big.Int, error) {
decoded, err := r.Decode(report)
if err != nil {
return nil, err
}
return decoded.BenchmarkPrice, nil
}