132 lines
3.0 KiB
Go
132 lines
3.0 KiB
Go
package app
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import (
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"encoding/json"
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"strings"
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"github.com/pkg/errors"
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cmn "github.com/tendermint/tmlibs/common"
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)
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//nolint
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const (
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ModuleNameBase = "base"
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)
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// InitState just holds module/key/value triples from
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// parsing the genesis file
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type InitState struct {
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Module string
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Key string
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Value string
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}
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// GetInitialState parses the genesis file in a format
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// that can easily be handed into InitState modules
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func GetInitialState(path string) ([]InitState, error) {
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genDoc, err := loadGenesis(path)
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if err != nil {
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return nil, err
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}
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opts := genDoc.AppOptions
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cnt := 1 + len(opts.Accounts) + len(opts.pluginOptions)
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res := make([]InitState, cnt)
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res[0] = InitState{ModuleNameBase, ChainKey, genDoc.ChainID}
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i := 1
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// set accounts
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for _, acct := range opts.Accounts {
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res[i] = InitState{"coin", "account", string(acct)}
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i++
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}
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// set plugin options
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for _, kv := range opts.pluginOptions {
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module, key := splitKey(kv.Key)
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res[i] = InitState{module, key, kv.Value}
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i++
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}
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return res, nil
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}
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type keyValue struct {
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Key string `json:"key"`
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Value string `json:"value"`
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}
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// FullGenesisDoc - includes tendermint (in the json, we ignore here)
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type FullGenesisDoc struct {
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ChainID string `json:"chain_id"`
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AppOptions *GenesisDoc `json:"app_options"`
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}
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// GenesisDoc - All genesis values
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type GenesisDoc struct {
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Accounts []json.RawMessage `json:"accounts"`
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PluginOptions []json.RawMessage `json:"plugin_options"`
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pluginOptions []keyValue // unmarshaled rawmessages
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}
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func loadGenesis(filePath string) (*FullGenesisDoc, error) {
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bytes, err := cmn.ReadFile(filePath)
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if err != nil {
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return nil, errors.Wrap(err, "loading genesis file")
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}
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// the basecoin genesis go-wire/data :)
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genDoc := new(FullGenesisDoc)
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err = json.Unmarshal(bytes, genDoc)
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if err != nil {
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return nil, errors.Wrap(err, "unmarshaling genesis file")
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}
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if genDoc.AppOptions == nil {
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genDoc.AppOptions = new(GenesisDoc)
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}
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pluginOpts, err := parseGenesisList(genDoc.AppOptions.PluginOptions)
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if err != nil {
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return nil, err
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}
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genDoc.AppOptions.pluginOptions = pluginOpts
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return genDoc, nil
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}
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func parseGenesisList(kvzIn []json.RawMessage) (kvz []keyValue, err error) {
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if len(kvzIn)%2 != 0 {
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return nil, errors.New("genesis cannot have an odd number of items. Format = [key1, value1, key2, value2, ...]")
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}
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for i := 0; i < len(kvzIn); i += 2 {
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kv := keyValue{}
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rawK := []byte(kvzIn[i])
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err := json.Unmarshal(rawK, &(kv.Key))
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if err != nil {
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return nil, errors.Errorf("Non-string key: %s", string(rawK))
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}
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// convert value to string if possible (otherwise raw json)
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rawV := kvzIn[i+1]
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err = json.Unmarshal(rawV, &(kv.Value))
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if err != nil {
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kv.Value = string(rawV)
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}
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kvz = append(kvz, kv)
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}
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return kvz, nil
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}
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// Splits the string at the first '/'.
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// if there are none, assign default module ("base").
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func splitKey(key string) (string, string) {
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if strings.Contains(key, "/") {
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keyParts := strings.SplitN(key, "/", 2)
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return keyParts[0], keyParts[1]
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}
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return ModuleNameBase, key
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}
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