Initial commit

.gitignore

···
+.DS_Store
+.vscode
+.env
+data
+__debug*
+
+# binaries
+/atr

Makefile

···
+SHELL = /bin/bash
+.SHELLFLAGS = -o pipefail -c
+
+.PHONY: help
+help: ## Print info about all commands
+	@echo "Commands:"
+	@echo
+	@grep -E '^[a-zA-Z0-9_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "    \033[01;32m%-20s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: build
+build: ## Build all executables
+	go build ./cmd/atr.go
+
+install: ## Install all executables
+	go install ./cmd/atr.go
+
+.PHONY: fmt
+fmt: ## Format all go files
+	go fmt ./*.go
+
+.PHONY: all
+all: build

README.md

···
+# atr
+
+AT Protocol IPLD-CAR Repository toolkit
+
+## Examples
+
+```bash
+curl 'https://bsky.social/xrpc/com.atproto.sync.getRepo?did=did:plc:524tuhdhh3m7li5gycdn6boe' | atr show
+```

cmd/atr.go

···
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/alecthomas/chroma"
+	"github.com/alecthomas/chroma/formatters"
+	"github.com/alecthomas/chroma/lexers"
+	"github.com/alecthomas/chroma/styles"
+	repo "github.com/atscan/atr/repo"
+	"github.com/ipfs/go-cid"
+	"github.com/itchyny/gojq"
+	jsoniter "github.com/json-iterator/go"
+	"github.com/klauspost/compress/zstd"
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+
+	app := &cli.App{
+		Name:  "atr",
+		Usage: "AT Protocol IPLD-CAR Repository toolkit",
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:  "C",
+				Usage: "Working directory",
+				Value: ".",
+			},
+		},
+		Commands: []*cli.Command{
+			{
+				Name:    "grep",
+				Aliases: []string{"g"},
+				Action: func(ctx *cli.Context) error {
+					return nil
+				},
+			},
+			{
+				Name:      "show",
+				ArgsUsage: "[<target>]",
+				Flags: []cli.Flag{
+					&cli.StringFlag{
+						Name:    "type",
+						Aliases: []string{"t"},
+						Usage:   "Filter by item type",
+						Value:   "",
+					},
+					&cli.StringFlag{
+						Name:    "query",
+						Aliases: []string{"q"},
+						Usage:   "Query results (jq syntax)",
+						Value:   "",
+					},
+					&cli.BoolFlag{
+						Name:  "raw",
+						Usage: "Do not use pretty print (faster)",
+						Value: false,
+					},
+				},
+				Action: func(ctx *cli.Context) error {
+					//q := ctx.Args().First()
+					q := ctx.String("query")
+					var query *gojq.Query
+					if q != "" {
+						tq, err := gojq.Parse(q)
+						if err != nil {
+							log.Fatalln("gojq parse error:", err)
+							//return err
+						} else {
+							query = tq
+						}
+					}
+
+					eo, err := exec.Command("defaults", "read", "-g", "AppleInterfaceStyle").Output()
+					if err != nil {
+						log.Fatal(err)
+					}
+					style := "paraiso-dark"
+					if strings.Index(string(eo), "Dark") != 0 {
+						style = "paraiso-light"
+					}
+					hg := highlight(style)
+
+					walk := func(list []RepoItem, err error) {
+
+						for _, e := range list {
+							tf := ctx.String("type")
+							if tf != "" {
+								if m := regexp.MustCompile(tf).Match([]byte(e.Path)); !m {
+									continue
+								}
+							}
+							var out interface{}
+							if q != "" {
+								json, err := jsoniter.Marshal(e.Body)
+								if err != nil {
+									log.Fatal("jsoniter error:", err)
+									continue
+								}
+								var pv interface{}
+								err = jsoniter.Unmarshal(json, &pv)
+								if err != nil {
+									log.Fatal("jsoniter error:", err)
+									continue
+								}
+								iter := query.Run(interface{}(pv))
+								for {
+									v, ok := iter.Next()
+									if !ok {
+										break
+									}
+									if err, ok := v.(error); ok {
+										log.Fatalln("gojq iter error:", err)
+										continue
+									}
+									if v == nil {
+										continue
+									}
+									out = v
+								}
+							} else {
+								out = e.Body
+							}
+							stat, _ := os.Stdout.Stat()
+							if ((stat.Mode() & os.ModeCharDevice) != 0) && ctx.Bool("raw") == false {
+								prettyPrint(out, hg)
+							} else {
+								print(out)
+							}
+						}
+					}
+
+					stat, _ := os.Stdin.Stat()
+					if (stat.Mode() & os.ModeCharDevice) == 0 {
+						// data is being piped to stdin
+						WalkStream(ctx, os.Stdin, walk)
+					} else {
+						//stdin is from a terminal
+						WalkFiles(ctx, walk)
+					}
+					return nil
+				},
+			},
+		},
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		log.Fatal(err)
+	}
+}
+
+type RepoItem struct {
+	Cid  cid.Cid
+	Path string
+	Body interface{}
+}
+
+func WalkFiles(ctx *cli.Context, cb func([]RepoItem, error)) error {
+	dir := ctx.Args().First()
+	if dir == "" {
+		dir = "."
+	}
+	info, err := os.Stat(dir)
+	if err != nil {
+		fmt.Println(err)
+		return err
+	}
+	//fmt.Println(info.IsDir())
+
+	if !info.IsDir() {
+		cb(Load(dir))
+		return nil
+	}
+	err = filepath.Walk(dir,
+		func(fn string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+			cb(Load(fn))
+			return nil
+		})
+	if err != nil {
+		log.Println(err)
+	}
+	return nil
+}
+
+func WalkStream(ctx *cli.Context, input io.Reader, cb func([]RepoItem, error)) error {
+	arr, err := LoadFromStream(input)
+	if err != nil {
+		return nil
+	}
+	cb(arr, nil)
+	return nil
+}
+
+func Load(fn string) ([]RepoItem, error) {
+	var list []RepoItem
+	var err error
+	if strings.HasSuffix(fn, ".car.zst") {
+		list, err = LoadCompressed(fn)
+	} else if strings.HasSuffix(fn, ".car") {
+		list, err = LoadRaw(fn)
+	}
+	if err != nil {
+		log.Fatal("Cannot load: ", fn)
+		return list, errors.New("Cannot load")
+	}
+	return list, nil
+}
+
+func LoadRaw(fn string) ([]RepoItem, error) {
+	dat, err := os.Open(fn)
+	defer dat.Close()
+
+	if err != nil {
+		return nil, err
+	}
+	return LoadFromStream(dat)
+}
+
+func LoadCompressed(fn string) ([]RepoItem, error) {
+	dat, err := os.Open(fn)
+	defer dat.Close()
+
+	if err != nil {
+		return nil, err
+	}
+	decoder, _ := zstd.NewReader(dat)
+	return LoadFromStream(decoder)
+}
+
+func LoadFromStream(input io.Reader) ([]RepoItem, error) {
+	rctx := context.TODO()
+	r, err := repo.ReadRepoFromCar(rctx, input)
+	if err != nil {
+		return nil, err
+	}
+	var out []RepoItem
+	if err := r.ForEach(rctx, "", func(k string, v cid.Cid) error {
+		_, rec, err := r.GetRecord(rctx, k)
+		if err != nil {
+			log.Println("Cannot get record:", v.String())
+		}
+		out = append(out, RepoItem{Cid: v, Path: k, Body: rec})
+		return nil
+	}); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func print(v interface{}) error {
+	json, err := jsoniter.Marshal(v)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(string(json))
+	return nil
+}
+
+func prettyPrint(v interface{}, hg func(io.Writer, string)) error {
+	json, err := jsoniter.MarshalIndent(v, "", "  ")
+	if err != nil {
+		log.Fatal(err)
+	}
+	hg(os.Stdout, string(json))
+	fmt.Println("")
+	return nil
+}
+
+func highlight(style string) func(w io.Writer, source string) {
+	// Determine lexer.
+	l := lexers.Get("json")
+	l = chroma.Coalesce(l)
+
+	// Determine formatter.
+	f := formatters.Get("terminal")
+	if f == nil {
+		f = formatters.Fallback
+	}
+	// Determine style.
+	s := styles.Get(style)
+	if s == nil {
+		s = styles.Fallback
+	}
+	return func(w io.Writer, source string) {
+		it, _ := l.Tokenise(nil, source)
+		f.Format(w, s, it)
+	}
+}

go.mod

···
+module github.com/atscan/atr
+
+go 1.20
+
+require (
+	github.com/alecthomas/chroma v0.10.0
+	github.com/bluesky-social/indigo v0.0.0-20230714174244-57d75d8cfc65
+	github.com/fxamacker/cbor/v2 v2.4.0
+	github.com/ipfs/go-cid v0.4.1
+	github.com/ipfs/go-datastore v0.6.0
+	github.com/ipfs/go-ipfs-blockstore v1.3.0
+	github.com/ipfs/go-ipld-cbor v0.0.7-0.20230126201833-a73d038d90bc
+	github.com/ipld/go-car/v2 v2.10.1
+	github.com/itchyny/gojq v0.12.13
+	github.com/json-iterator/go v1.1.12
+	github.com/klauspost/compress v1.16.7
+	github.com/urfave/cli/v2 v2.25.7
+	github.com/whyrusleeping/cbor-gen v0.0.0-20230331140348-1f892b517e70
+	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2
+)
+
+require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/dlclark/regexp2 v1.4.0 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/go-retryablehttp v0.7.2 // indirect
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
+	github.com/ipfs/bbloom v0.0.4 // indirect
+	github.com/ipfs/go-block-format v0.1.2 // indirect
+	github.com/ipfs/go-ipfs-ds-help v1.1.0 // indirect
+	github.com/ipfs/go-ipfs-util v0.0.2 // indirect
+	github.com/ipfs/go-ipld-format v0.5.0 // indirect
+	github.com/ipfs/go-log v1.0.5 // indirect
+	github.com/ipfs/go-log/v2 v2.5.1 // indirect
+	github.com/ipfs/go-metrics-interface v0.0.1 // indirect
+	github.com/ipld/go-ipld-prime v0.20.0 // indirect
+	github.com/itchyny/timefmt-go v0.1.5 // indirect
+	github.com/jbenet/goprocess v0.1.4 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/minio/sha256-simd v1.0.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/mr-tron/base58 v1.2.0 // indirect
+	github.com/multiformats/go-base32 v0.1.0 // indirect
+	github.com/multiformats/go-base36 v0.2.0 // indirect
+	github.com/multiformats/go-multibase v0.2.0 // indirect
+	github.com/multiformats/go-multicodec v0.9.0 // indirect
+	github.com/multiformats/go-multihash v0.2.3 // indirect
+	github.com/multiformats/go-varint v0.0.7 // indirect
+	github.com/opentracing/opentracing-go v1.2.0 // indirect
+	github.com/petar/GoLLRB v0.0.0-20210522233825-ae3b015fd3e9 // indirect
+	github.com/polydawn/refmt v0.89.1-0.20221221234430-40501e09de1f // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/spaolacci/murmur3 v1.1.0 // indirect
+	github.com/whyrusleeping/cbor v0.0.0-20171005072247-63513f603b11 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	go.uber.org/atomic v1.10.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.24.0 // indirect
+	golang.org/x/crypto v0.7.0 // indirect
+	golang.org/x/exp v0.0.0-20230321023759-10a507213a29 // indirect
+	golang.org/x/sys v0.10.0 // indirect
+	lukechampine.com/blake3 v1.1.7 // indirect
+)

go.sum

···
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/alecthomas/chroma v0.10.0 h1:7XDcGkCQopCNKjZHfYrNLraA+M7e0fMiJ/Mfikbfjek=
+github.com/alecthomas/chroma v0.10.0/go.mod h1:jtJATyUxlIORhUOFNA9NZDWGAQ8wpxQQqNSB4rjA/1s=
+github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
+github.com/bluesky-social/indigo v0.0.0-20230714174244-57d75d8cfc65 h1:0z5rF7oA9eqqoAFoiHTfioBK8U4hzMmyGMoajEqJVFE=
+github.com/bluesky-social/indigo v0.0.0-20230714174244-57d75d8cfc65/go.mod h1:oDI5NiD0XzShv5VITWyUJNP3pSh4prTDEzhKbkdKORA=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
+github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dlclark/regexp2 v1.4.0 h1:F1rxgk7p4uKjwIQxBs9oAXe5CqrXlCduYEJvrF4u93E=
+github.com/dlclark/regexp2 v1.4.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
+github.com/frankban/quicktest v1.14.4 h1:g2rn0vABPOOXmZUj+vbmUp0lPoXEMuhTpIluN0XL9UY=
+github.com/fxamacker/cbor/v2 v2.4.0 h1:ri0ArlOR+5XunOP8CRUowT0pSJOwhW098ZCUyskZD88=
+github.com/fxamacker/cbor/v2 v2.4.0/go.mod h1:TA1xS00nchWmaBnEIxPSE5oHLuJBAVvqrtAnWBwBCVo=
+github.com/go-yaml/yaml v2.1.0+incompatible/go.mod h1:w2MrLa16VYP0jy6N7M5kHaCkaLENm+P+Tv+MfurjSw0=
+github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
+github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
+github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/hashicorp/go-cleanhttp v0.5.2 h1:035FKYIWjmULyFRBKPs8TBQoi0x6d9G4xc9neXJWAZQ=
+github.com/hashicorp/go-cleanhttp v0.5.2/go.mod h1:kO/YDlP8L1346E6Sodw+PrpBSV4/SoxCXGY6BqNFT48=
+github.com/hashicorp/go-hclog v0.9.2 h1:CG6TE5H9/JXsFWJCfoIVpKFIkFe6ysEuHirp4DxCsHI=
+github.com/hashicorp/go-hclog v0.9.2/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrjA0H7acj2lQ=
+github.com/hashicorp/go-retryablehttp v0.7.2 h1:AcYqCvkpalPnPF2pn0KamgwamS42TqUDDYFRKq/RAd0=
+github.com/hashicorp/go-retryablehttp v0.7.2/go.mod h1:Jy/gPYAdjqffZ/yFGCFV2doI5wjtH1ewM9u8iYVjtX8=
+github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
+github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
+github.com/ipfs/bbloom v0.0.4 h1:Gi+8EGJ2y5qiD5FbsbpX/TMNcJw8gSqr7eyjHa4Fhvs=
+github.com/ipfs/bbloom v0.0.4/go.mod h1:cS9YprKXpoZ9lT0n/Mw/a6/aFV6DTjTLYHeA+gyqMG0=
+github.com/ipfs/go-bitfield v1.1.0 h1:fh7FIo8bSwaJEh6DdTWbCeZ1eqOaOkKFI74SCnsWbGA=
+github.com/ipfs/go-block-format v0.1.2 h1:GAjkfhVx1f4YTODS6Esrj1wt2HhrtwTnhEr+DyPUaJo=
+github.com/ipfs/go-block-format v0.1.2/go.mod h1:mACVcrxarQKstUU3Yf/RdwbC4DzPV6++rO2a3d+a/KE=
+github.com/ipfs/go-cid v0.0.5/go.mod h1:plgt+Y5MnOey4vO4UlUazGqdbEXuFYitED67FexhXog=
+github.com/ipfs/go-cid v0.0.6/go.mod h1:6Ux9z5e+HpkQdckYoX1PG/6xqKspzlEIR5SDmgqgC/I=
+github.com/ipfs/go-cid v0.4.1 h1:A/T3qGvxi4kpKWWcPC/PgbvDA2bjVLO7n4UeVwnbs/s=
+github.com/ipfs/go-cid v0.4.1/go.mod h1:uQHwDeX4c6CtyrFwdqyhpNcxVewur1M7l7fNU7LKwZk=
+github.com/ipfs/go-datastore v0.5.0/go.mod h1:9zhEApYMTl17C8YDp7JmU7sQZi2/wqiYh73hakZ90Bk=
+github.com/ipfs/go-datastore v0.6.0 h1:JKyz+Gvz1QEZw0LsX1IBn+JFCJQH4SJVFtM4uWU0Myk=
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repo/cbor_gen.go

···
+// Code generated by github.com/whyrusleeping/cbor-gen. DO NOT EDIT.
+
+package repo
+
+import (
+	"fmt"
+	"io"
+	"math"
+	"sort"
+
+	cid "github.com/ipfs/go-cid"
+	cbg "github.com/whyrusleeping/cbor-gen"
+	xerrors "golang.org/x/xerrors"
+)
+
+var _ = xerrors.Errorf
+var _ = cid.Undef
+var _ = math.E
+var _ = sort.Sort
+
+func (t *SignedCommit) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+
+	cw := cbg.NewCborWriter(w)
+
+	if _, err := cw.Write([]byte{165}); err != nil {
+		return err
+	}
+
+	// t.Did (string) (string)
+	if len("did") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"did\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("did"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("did")); err != nil {
+		return err
+	}
+
+	if len(t.Did) > cbg.MaxLength {
+		return xerrors.Errorf("Value in field t.Did was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Did))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string(t.Did)); err != nil {
+		return err
+	}
+
+	// t.Sig ([]uint8) (slice)
+	if len("sig") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"sig\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("sig"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("sig")); err != nil {
+		return err
+	}
+
+	if len(t.Sig) > cbg.ByteArrayMaxLen {
+		return xerrors.Errorf("Byte array in field t.Sig was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(t.Sig))); err != nil {
+		return err
+	}
+
+	if _, err := cw.Write(t.Sig[:]); err != nil {
+		return err
+	}
+
+	// t.Data (cid.Cid) (struct)
+	if len("data") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"data\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("data"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("data")); err != nil {
+		return err
+	}
+
+	if err := cbg.WriteCid(cw, t.Data); err != nil {
+		return xerrors.Errorf("failed to write cid field t.Data: %w", err)
+	}
+
+	// t.Prev (cid.Cid) (struct)
+	if len("prev") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"prev\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("prev"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("prev")); err != nil {
+		return err
+	}
+
+	if t.Prev == nil {
+		if _, err := cw.Write(cbg.CborNull); err != nil {
+			return err
+		}
+	} else {
+		if err := cbg.WriteCid(cw, *t.Prev); err != nil {
+			return xerrors.Errorf("failed to write cid field t.Prev: %w", err)
+		}
+	}
+
+	// t.Version (int64) (int64)
+	if len("version") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"version\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("version"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("version")); err != nil {
+		return err
+	}
+
+	if t.Version >= 0 {
+		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.Version)); err != nil {
+			return err
+		}
+	} else {
+		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.Version-1)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (t *SignedCommit) UnmarshalCBOR(r io.Reader) (err error) {
+	*t = SignedCommit{}
+
+	cr := cbg.NewCborReader(r)
+
+	maj, extra, err := cr.ReadHeader()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err == io.EOF {
+			err = io.ErrUnexpectedEOF
+		}
+	}()
+
+	if maj != cbg.MajMap {
+		return fmt.Errorf("cbor input should be of type map")
+	}
+
+	if extra > cbg.MaxLength {
+		return fmt.Errorf("SignedCommit: map struct too large (%d)", extra)
+	}
+
+	var name string
+	n := extra
+
+	for i := uint64(0); i < n; i++ {
+
+		{
+			sval, err := cbg.ReadString(cr)
+			if err != nil {
+				return err
+			}
+
+			name = string(sval)
+		}
+
+		switch name {
+		// t.Did (string) (string)
+		case "did":
+
+			{
+				sval, err := cbg.ReadString(cr)
+				if err != nil {
+					return err
+				}
+
+				t.Did = string(sval)
+			}
+			// t.Sig ([]uint8) (slice)
+		case "sig":
+
+			maj, extra, err = cr.ReadHeader()
+			if err != nil {
+				return err
+			}
+
+			if extra > cbg.ByteArrayMaxLen {
+				return fmt.Errorf("t.Sig: byte array too large (%d)", extra)
+			}
+			if maj != cbg.MajByteString {
+				return fmt.Errorf("expected byte array")
+			}
+
+			if extra > 0 {
+				t.Sig = make([]uint8, extra)
+			}
+
+			if _, err := io.ReadFull(cr, t.Sig[:]); err != nil {
+				return err
+			}
+			// t.Data (cid.Cid) (struct)
+		case "data":
+
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Data: %w", err)
+				}
+
+				t.Data = c
+
+			}
+			// t.Prev (cid.Cid) (struct)
+		case "prev":
+
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+
+					c, err := cbg.ReadCid(cr)
+					if err != nil {
+						return xerrors.Errorf("failed to read cid field t.Prev: %w", err)
+					}
+
+					t.Prev = &c
+				}
+
+			}
+			// t.Version (int64) (int64)
+		case "version":
+			{
+				maj, extra, err := cr.ReadHeader()
+				var extraI int64
+				if err != nil {
+					return err
+				}
+				switch maj {
+				case cbg.MajUnsignedInt:
+					extraI = int64(extra)
+					if extraI < 0 {
+						return fmt.Errorf("int64 positive overflow")
+					}
+				case cbg.MajNegativeInt:
+					extraI = int64(extra)
+					if extraI < 0 {
+						return fmt.Errorf("int64 negative overflow")
+					}
+					extraI = -1 - extraI
+				default:
+					return fmt.Errorf("wrong type for int64 field: %d", maj)
+				}
+
+				t.Version = int64(extraI)
+			}
+
+		default:
+			// Field doesn't exist on this type, so ignore it
+			cbg.ScanForLinks(r, func(cid.Cid) {})
+		}
+	}
+
+	return nil
+}
+func (t *UnsignedCommit) MarshalCBOR(w io.Writer) error {
+	if t == nil {
+		_, err := w.Write(cbg.CborNull)
+		return err
+	}
+
+	cw := cbg.NewCborWriter(w)
+
+	if _, err := cw.Write([]byte{164}); err != nil {
+		return err
+	}
+
+	// t.Did (string) (string)
+	if len("did") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"did\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("did"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("did")); err != nil {
+		return err
+	}
+
+	if len(t.Did) > cbg.MaxLength {
+		return xerrors.Errorf("Value in field t.Did was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len(t.Did))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string(t.Did)); err != nil {
+		return err
+	}
+
+	// t.Data (cid.Cid) (struct)
+	if len("data") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"data\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("data"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("data")); err != nil {
+		return err
+	}
+
+	if err := cbg.WriteCid(cw, t.Data); err != nil {
+		return xerrors.Errorf("failed to write cid field t.Data: %w", err)
+	}
+
+	// t.Prev (cid.Cid) (struct)
+	if len("prev") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"prev\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("prev"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("prev")); err != nil {
+		return err
+	}
+
+	if t.Prev == nil {
+		if _, err := cw.Write(cbg.CborNull); err != nil {
+			return err
+		}
+	} else {
+		if err := cbg.WriteCid(cw, *t.Prev); err != nil {
+			return xerrors.Errorf("failed to write cid field t.Prev: %w", err)
+		}
+	}
+
+	// t.Version (int64) (int64)
+	if len("version") > cbg.MaxLength {
+		return xerrors.Errorf("Value in field \"version\" was too long")
+	}
+
+	if err := cw.WriteMajorTypeHeader(cbg.MajTextString, uint64(len("version"))); err != nil {
+		return err
+	}
+	if _, err := io.WriteString(w, string("version")); err != nil {
+		return err
+	}
+
+	if t.Version >= 0 {
+		if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, uint64(t.Version)); err != nil {
+			return err
+		}
+	} else {
+		if err := cw.WriteMajorTypeHeader(cbg.MajNegativeInt, uint64(-t.Version-1)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (t *UnsignedCommit) UnmarshalCBOR(r io.Reader) (err error) {
+	*t = UnsignedCommit{}
+
+	cr := cbg.NewCborReader(r)
+
+	maj, extra, err := cr.ReadHeader()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err == io.EOF {
+			err = io.ErrUnexpectedEOF
+		}
+	}()
+
+	if maj != cbg.MajMap {
+		return fmt.Errorf("cbor input should be of type map")
+	}
+
+	if extra > cbg.MaxLength {
+		return fmt.Errorf("UnsignedCommit: map struct too large (%d)", extra)
+	}
+
+	var name string
+	n := extra
+
+	for i := uint64(0); i < n; i++ {
+
+		{
+			sval, err := cbg.ReadString(cr)
+			if err != nil {
+				return err
+			}
+
+			name = string(sval)
+		}
+
+		switch name {
+		// t.Did (string) (string)
+		case "did":
+
+			{
+				sval, err := cbg.ReadString(cr)
+				if err != nil {
+					return err
+				}
+
+				t.Did = string(sval)
+			}
+			// t.Data (cid.Cid) (struct)
+		case "data":
+
+			{
+
+				c, err := cbg.ReadCid(cr)
+				if err != nil {
+					return xerrors.Errorf("failed to read cid field t.Data: %w", err)
+				}
+
+				t.Data = c
+
+			}
+			// t.Prev (cid.Cid) (struct)
+		case "prev":
+
+			{
+
+				b, err := cr.ReadByte()
+				if err != nil {
+					return err
+				}
+				if b != cbg.CborNull[0] {
+					if err := cr.UnreadByte(); err != nil {
+						return err
+					}
+
+					c, err := cbg.ReadCid(cr)
+					if err != nil {
+						return xerrors.Errorf("failed to read cid field t.Prev: %w", err)
+					}
+
+					t.Prev = &c
+				}
+
+			}
+			// t.Version (int64) (int64)
+		case "version":
+			{
+				maj, extra, err := cr.ReadHeader()
+				var extraI int64
+				if err != nil {
+					return err
+				}
+				switch maj {
+				case cbg.MajUnsignedInt:
+					extraI = int64(extra)
+					if extraI < 0 {
+						return fmt.Errorf("int64 positive overflow")
+					}
+				case cbg.MajNegativeInt:
+					extraI = int64(extra)
+					if extraI < 0 {
+						return fmt.Errorf("int64 negative overflow")
+					}
+					extraI = -1 - extraI
+				default:
+					return fmt.Errorf("wrong type for int64 field: %d", maj)
+				}
+
+				t.Version = int64(extraI)
+			}
+
+		default:
+			// Field doesn't exist on this type, so ignore it
+			cbg.ScanForLinks(r, func(cid.Cid) {})
+		}
+	}
+
+	return nil
+}

repo/repo.go

···
+package repo
+
+import (
+	"context"
+	"fmt"
+	"io"
+
+	cbor2 "github.com/fxamacker/cbor/v2"
+
+	"github.com/bluesky-social/indigo/mst"
+	"github.com/bluesky-social/indigo/util"
+	"github.com/ipfs/go-cid"
+	"github.com/ipfs/go-datastore"
+	blockstore "github.com/ipfs/go-ipfs-blockstore"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	"github.com/ipld/go-car/v2"
+)
+
+// current version of repo currently implemented
+const ATP_REPO_VERSION int64 = 2
+
+type SignedCommit struct {
+	Did     string   `cborgen:"did"`
+	Version int64    `cborgen:"version"`
+	Prev    *cid.Cid `cborgen:"prev"`
+	Data    cid.Cid  `cborgen:"data"`
+	Sig     []byte   `cborgen:"sig"`
+}
+
+type UnsignedCommit struct {
+	Did     string   `cborgen:"did"`
+	Version int64    `cborgen:"version"`
+	Prev    *cid.Cid `cborgen:"prev"`
+	Data    cid.Cid  `cborgen:"data"`
+}
+
+type Repo struct {
+	sc  SignedCommit
+	cst cbor.IpldStore
+	bs  blockstore.Blockstore
+
+	repoCid cid.Cid
+
+	mst *mst.MerkleSearchTree
+
+	dirty bool
+}
+
+// Returns a copy of commit without the Sig field. Helpful when verifying signature.
+func (sc *SignedCommit) Unsigned() *UnsignedCommit {
+	return &UnsignedCommit{
+		Did:     sc.Did,
+		Version: sc.Version,
+		Prev:    sc.Prev,
+		Data:    sc.Data,
+	}
+}
+
+// returns bytes of the DAG-CBOR representation of object. This is what gets
+// signed; the `go-did` library will take the SHA-256 of the bytes and sign
+// that.
+/*func (uc *UnsignedCommit) BytesForSigning() ([]byte, error) {
+	buf := new(bytes.Buffer)
+	/if err := uc.MarshalCBOR(buf); err != nil {
+		return []byte{}, err
+	}
+	return buf.Bytes(), nil
+}*/
+
+func IngestRepo(ctx context.Context, bs blockstore.Blockstore, r io.Reader) (cid.Cid, error) {
+	br, err := car.NewBlockReader(r)
+	if err != nil {
+		return cid.Undef, err
+	}
+
+	for {
+		blk, err := br.Next()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return cid.Undef, err
+		}
+
+		if err := bs.Put(ctx, blk); err != nil {
+			return cid.Undef, err
+		}
+	}
+
+	return br.Roots[0], nil
+}
+
+func ReadRepoFromCar(ctx context.Context, r io.Reader) (*Repo, error) {
+	bs := blockstore.NewBlockstore(datastore.NewMapDatastore())
+	root, err := IngestRepo(ctx, bs, r)
+	if err != nil {
+		return nil, err
+	}
+
+	return OpenRepo(ctx, bs, root, false)
+}
+
+func OpenRepo(ctx context.Context, bs blockstore.Blockstore, root cid.Cid, fullRepo bool) (*Repo, error) {
+	cst := util.CborStore(bs)
+
+	var sc SignedCommit
+	if err := cst.Get(ctx, root, &sc); err != nil {
+		return nil, fmt.Errorf("loading root from blockstore: %w", err)
+	}
+
+	if sc.Version != ATP_REPO_VERSION {
+		return nil, fmt.Errorf("unsupported repo version: %d", sc.Version)
+	}
+
+	return &Repo{
+		sc:      sc,
+		bs:      bs,
+		cst:     cst,
+		repoCid: root,
+	}, nil
+}
+
+func (r *Repo) getMst(ctx context.Context) (*mst.MerkleSearchTree, error) {
+	if r.mst != nil {
+		return r.mst, nil
+	}
+
+	t := mst.LoadMST(r.cst, r.sc.Data)
+	r.mst = t
+	return t, nil
+}
+
+var ErrDoneIterating = fmt.Errorf("done iterating")
+
+func (r *Repo) ForEach(ctx context.Context, prefix string, cb func(k string, v cid.Cid) error) error {
+	t := mst.LoadMST(r.cst, r.sc.Data)
+
+	if err := t.WalkLeavesFrom(ctx, prefix, cb); err != nil {
+		if err != ErrDoneIterating {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (r *Repo) GetRecord(ctx context.Context, rpath string) (cid.Cid, interface{}, error) {
+	mst, err := r.getMst(ctx)
+	if err != nil {
+		return cid.Undef, nil, fmt.Errorf("getting repo mst: %w", err)
+	}
+
+	cc, err := mst.Get(ctx, rpath)
+	if err != nil {
+		return cid.Undef, nil, fmt.Errorf("resolving rpath within mst: %w", err)
+	}
+
+	blk, err := r.bs.Get(ctx, cc)
+	if err != nil {
+		return cid.Undef, nil, err
+	}
+
+	//fmt.Println(hex.EncodeToString(blk.RawData()))
+
+	var v interface{}
+	cbor2.Unmarshal(blk.RawData(), &v)
+
+	//fmt.Println(string(json))
+
+	/*rec, err := lexutil.CborDecodeValue(blk.RawData())
+	if err != nil {
+		return cid.Undef, nil, err
+	}*/
+
+	return cc, v, nil
+}