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79 lines
1.8 KiB
79 lines
1.8 KiB
package files
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import (
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"encoding/json"
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"os"
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"github.com/pkg/errors"
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wire "github.com/tendermint/go-wire"
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"github.com/tendermint/tendermint/light"
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lightErr "github.com/tendermint/tendermint/light/errors"
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)
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const (
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// MaxFullCommitSize is the maximum number of bytes we will
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// read in for a full commit to avoid excessive allocations
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// in the deserializer
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MaxFullCommitSize = 1024 * 1024
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)
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// SaveFullCommit exports the seed in binary / go-wire style
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func SaveFullCommit(fc light.FullCommit, path string) error {
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f, err := os.Create(path)
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if err != nil {
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return errors.WithStack(err)
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}
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defer f.Close()
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var n int
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wire.WriteBinary(fc, f, &n, &err)
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return errors.WithStack(err)
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}
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// SaveFullCommitJSON exports the seed in a json format
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func SaveFullCommitJSON(fc light.FullCommit, path string) error {
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f, err := os.Create(path)
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if err != nil {
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return errors.WithStack(err)
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}
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defer f.Close()
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stream := json.NewEncoder(f)
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err = stream.Encode(fc)
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return errors.WithStack(err)
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}
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// LoadFullCommit loads the full commit from the file system.
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func LoadFullCommit(path string) (light.FullCommit, error) {
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var fc light.FullCommit
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f, err := os.Open(path)
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if err != nil {
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if os.IsNotExist(err) {
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return fc, lightErr.ErrCommitNotFound()
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}
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return fc, errors.WithStack(err)
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}
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defer f.Close()
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var n int
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wire.ReadBinaryPtr(&fc, f, MaxFullCommitSize, &n, &err)
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return fc, errors.WithStack(err)
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}
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// LoadFullCommitJSON loads the commit from the file system in JSON format.
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func LoadFullCommitJSON(path string) (light.FullCommit, error) {
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var fc light.FullCommit
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f, err := os.Open(path)
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if err != nil {
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if os.IsNotExist(err) {
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return fc, lightErr.ErrCommitNotFound()
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}
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return fc, errors.WithStack(err)
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}
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defer f.Close()
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stream := json.NewDecoder(f)
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err = stream.Decode(&fc)
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return fc, errors.WithStack(err)
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}
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