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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package multisig | ||
|
|
||
| import ( | ||
| types "github.com/cosmos/cosmos-sdk/codec/types" | ||
| cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types" | ||
| sdkerrors "github.com/cosmos/cosmos-sdk/types/errors" | ||
| ) | ||
|
|
||
| // tmMultisig implements a K of N threshold multisig. It is used for | ||
| // Amino JSON marshaling of LegacyAminoPubKey (see below for details). | ||
| // | ||
| // This struct is copy-pasted from: | ||
| // https://github.com/tendermint/tendermint/blob/v0.33.9/crypto/multisig/threshold_pubkey.go | ||
| // | ||
| // This struct was used in the SDK <=0.39. In 0.40 and the switch to protobuf, | ||
| // it has been converted to LegacyAminoPubKey. However, there's one difference: | ||
| // the threshold field was an `uint` before, and an `uint32` after. This caused | ||
| // amino marshaling to be breaking: amino marshals `uint32` as a JSON number, | ||
| // and `uint` as a JSON string. | ||
| // | ||
| // In this file, we're overriding LegacyAminoPubKey's default JSON Amino | ||
| // marshaling by using this struct. Please note that we are NOT overriding the | ||
| // Amino binary marshaling, as that _might_ introduce breaking changes in the | ||
| // keyring, where multisigs are amino-binary-encoded. | ||
| // | ||
| // ref: https://github.com/cosmos/cosmos-sdk/issues/8776 | ||
| type tmMultisig struct { | ||
| K uint `json:"threshold"` | ||
| PubKeys []cryptotypes.PubKey `json:"pubkeys"` | ||
| } | ||
|
|
||
| // protoToTm converts a LegacyAminoPubKey into a tmMultisig. | ||
| func protoToTm(protoPk *LegacyAminoPubKey) (tmMultisig, error) { | ||
| var ok bool | ||
| pks := make([]cryptotypes.PubKey, len(protoPk.PubKeys)) | ||
| for i, pk := range protoPk.PubKeys { | ||
| pks[i], ok = pk.GetCachedValue().(cryptotypes.PubKey) | ||
| if !ok { | ||
| return tmMultisig{}, sdkerrors.Wrapf(sdkerrors.ErrInvalidType, "expected %T, got %T", (cryptotypes.PubKey)(nil), pk.GetCachedValue()) | ||
| } | ||
| } | ||
|
|
||
| return tmMultisig{ | ||
| K: uint(protoPk.Threshold), | ||
| PubKeys: pks, | ||
| }, nil | ||
| } | ||
|
|
||
| // tmToProto converts a tmMultisig into a LegacyAminoPubKey. | ||
| func tmToProto(tmPk tmMultisig) (*LegacyAminoPubKey, error) { | ||
| var err error | ||
| pks := make([]*types.Any, len(tmPk.PubKeys)) | ||
| for i, pk := range tmPk.PubKeys { | ||
| pks[i], err = types.NewAnyWithValue(pk) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| return &LegacyAminoPubKey{ | ||
| Threshold: uint32(tmPk.K), | ||
| PubKeys: pks, | ||
| }, nil | ||
| } | ||
|
|
||
| // MarshalAminoJSON overrides amino JSON unmarshaling. | ||
| func (m LegacyAminoPubKey) MarshalAminoJSON() (tmMultisig, error) { //nolint:golint | ||
| return protoToTm(&m) | ||
| } | ||
|
|
||
| // UnmarshalAminoJSON overrides amino JSON unmarshaling. | ||
| func (m *LegacyAminoPubKey) UnmarshalAminoJSON(tmPk tmMultisig) error { | ||
| protoPk, err := tmToProto(tmPk) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // Instead of just doing `*m = *protoPk`, we prefer to modify in-place the | ||
| // existing Anys inside `m` (instead of allocating new Anys), as so not to | ||
| // break the `.compat` fields in the existing Anys. | ||
| for i := range m.PubKeys { | ||
| m.PubKeys[i].TypeUrl = protoPk.PubKeys[i].TypeUrl | ||
| m.PubKeys[i].Value = protoPk.PubKeys[i].Value | ||
| } | ||
| m.Threshold = protoPk.Threshold | ||
|
|
||
| return nil | ||
| } |
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