cosmos-sdk/store/tools/ics23/smt/helpers/random.go

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feat: Add ics23 proof tools: `ics23-{iavl,tendermint,smt}` (#10802) Moves the separate repos for ICS23 proof tooling into `store/tools` I've set `github.com/confio/ics23/go` to version 0.7.0 in anticipation of https://github.com/confio/ics23/pull/61 being merged, as it's a dependency for SMT proofs, so this shouldn't be merged until that version exists. Closes: https://github.com/cosmos/cosmos-sdk/issues/10801 --- ### Author Checklist *All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow up issues.* I have... - [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [x] added `!` to the type prefix if API or client breaking change - [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting)) - [x] provided a link to the relevant issue or specification - [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules) - [x] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing) - [ ] added a changelog entry to `CHANGELOG.md` - [x] included comments for [documenting Go code](https://blog.golang.org/godoc) - [ ] updated the relevant documentation or specification - [ ] reviewed "Files changed" and left comments if necessary - [ ] confirmed all CI checks have passed ### Reviewers Checklist *All items are required. Please add a note if the item is not applicable and please add your handle next to the items reviewed if you only reviewed selected items.* I have... - [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] confirmed `!` in the type prefix if API or client breaking change - [ ] confirmed all author checklist items have been addressed - [ ] reviewed state machine logic - [ ] reviewed API design and naming - [ ] reviewed documentation is accurate - [ ] reviewed tests and test coverage - [ ] manually tested (if applicable)
2022-02-22 03:39:08 -08:00
package helpers
import (
crand "crypto/rand"
"encoding/binary"
"fmt"
rand "math/rand"
)
const (
strChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
)
func init() {
rand.Seed(42)
// rand.Seed(crandSeed())
}
func randStr(n int) string {
b := make([]byte, n)
for i := range b {
b[i] = strChars[rand.Intn(len(strChars))]
}
return string(b)
}
func crandSeed() int64 {
var seed int64
err := binary.Read(crand.Reader, binary.BigEndian, &seed)
if err != nil {
panic(fmt.Sprintf("could not read random seed from crypto/rand: %v", err))
}
return seed
}