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Migrate Tendermint client state to proto (cosmos#6932)
* add tm client state proto file * migrate tm client state to proto * bump ics23 dep * add issue link to makefile
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| syntax = "proto3"; | ||
| package ibc.tendermint; | ||
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| option go_package = "github.com/cosmos/cosmos-sdk/x/ibc/07-tendermint/types"; | ||
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| import "confio/proofs.proto"; | ||
| import "google/protobuf/duration.proto"; | ||
| import "gogoproto/gogo.proto"; | ||
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| // ClientState from Tendermint tracks the current validator set, latest height, | ||
| // and a possible frozen height. | ||
| message ClientState { | ||
| option (gogoproto.goproto_getters) = false; | ||
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||
| string chain_id = 1 [(gogoproto.customname) = "ChainID"]; | ||
| Fraction trust_level = 2 [ | ||
| (gogoproto.nullable) = false, | ||
| (gogoproto.moretags) = "yaml:\"trust_level\"" | ||
| ]; | ||
| // duration of the period since the LastestTimestamp during which the | ||
| // submitted headers are valid for upgrade | ||
| google.protobuf.Duration trusting_period = 3 [ | ||
| (gogoproto.nullable) = false, | ||
| (gogoproto.stdduration) = true, | ||
| (gogoproto.moretags) = "yaml:\"trusting_period\"" | ||
| ]; | ||
| // duration of the staking unbonding period | ||
| google.protobuf.Duration unbonding_period = 4 [ | ||
| (gogoproto.nullable) = false, | ||
| (gogoproto.stdduration) = true, | ||
| (gogoproto.moretags) = "yaml:\"unbonding_period\"" | ||
| ]; | ||
| // defines how much new (untrusted) header's Time can drift into the future. | ||
| google.protobuf.Duration max_clock_drift = 5 [ | ||
| (gogoproto.nullable) = false, | ||
| (gogoproto.stdduration) = true, | ||
| (gogoproto.moretags) = "yaml:\"max_clock_drift\"" | ||
| ]; | ||
| // Block height when the client was frozen due to a misbehaviour | ||
| uint64 frozen_height = 6 [(gogoproto.moretags) = "yaml:\"frozen_height\""]; | ||
| // Latest height the client was updated to | ||
| uint64 latest_height = 7 [(gogoproto.moretags) = "yaml:\"latest_height\""]; | ||
| // Proof specifications used in verifying counterparty state | ||
| repeated ics23.ProofSpec proof_specs = 8 | ||
| [(gogoproto.moretags) = "yaml:\"proof_specs\""]; | ||
| } | ||
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||
| // Fraction defines the protobuf message type for tmmath.Fraction | ||
| message Fraction { | ||
| int64 numerator = 1; | ||
| int64 denominator = 2; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,234 @@ | ||
| syntax = "proto3"; | ||
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| package ics23; | ||
| option go_package = "github.com/confio/ics23/go"; | ||
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| enum HashOp { | ||
| // NO_HASH is the default if no data passed. Note this is an illegal argument some places. | ||
| NO_HASH = 0; | ||
| SHA256 = 1; | ||
| SHA512 = 2; | ||
| KECCAK = 3; | ||
| RIPEMD160 = 4; | ||
| BITCOIN = 5; // ripemd160(sha256(x)) | ||
| } | ||
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| /** | ||
| LengthOp defines how to process the key and value of the LeafOp | ||
| to include length information. After encoding the length with the given | ||
| algorithm, the length will be prepended to the key and value bytes. | ||
| (Each one with it's own encoded length) | ||
| */ | ||
| enum LengthOp { | ||
| // NO_PREFIX don't include any length info | ||
| NO_PREFIX = 0; | ||
| // VAR_PROTO uses protobuf (and go-amino) varint encoding of the length | ||
| VAR_PROTO = 1; | ||
| // VAR_RLP uses rlp int encoding of the length | ||
| VAR_RLP = 2; | ||
| // FIXED32_BIG uses big-endian encoding of the length as a 32 bit integer | ||
| FIXED32_BIG = 3; | ||
| // FIXED32_LITTLE uses little-endian encoding of the length as a 32 bit integer | ||
| FIXED32_LITTLE = 4; | ||
| // FIXED64_BIG uses big-endian encoding of the length as a 64 bit integer | ||
| FIXED64_BIG = 5; | ||
| // FIXED64_LITTLE uses little-endian encoding of the length as a 64 bit integer | ||
| FIXED64_LITTLE = 6; | ||
| // REQUIRE_32_BYTES is like NONE, but will fail if the input is not exactly 32 bytes (sha256 output) | ||
| REQUIRE_32_BYTES = 7; | ||
| // REQUIRE_64_BYTES is like NONE, but will fail if the input is not exactly 64 bytes (sha512 output) | ||
| REQUIRE_64_BYTES = 8; | ||
| } | ||
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| /** | ||
| ExistenceProof takes a key and a value and a set of steps to perform on it. | ||
| The result of peforming all these steps will provide a "root hash", which can | ||
| be compared to the value in a header. | ||
| Since it is computationally infeasible to produce a hash collission for any of the used | ||
| cryptographic hash functions, if someone can provide a series of operations to transform | ||
| a given key and value into a root hash that matches some trusted root, these key and values | ||
| must be in the referenced merkle tree. | ||
| The only possible issue is maliablity in LeafOp, such as providing extra prefix data, | ||
| which should be controlled by a spec. Eg. with lengthOp as NONE, | ||
| prefix = FOO, key = BAR, value = CHOICE | ||
| and | ||
| prefix = F, key = OOBAR, value = CHOICE | ||
| would produce the same value. | ||
| With LengthOp this is tricker but not impossible. Which is why the "leafPrefixEqual" field | ||
| in the ProofSpec is valuable to prevent this mutability. And why all trees should | ||
| length-prefix the data before hashing it. | ||
| */ | ||
| message ExistenceProof { | ||
| bytes key = 1; | ||
| bytes value = 2; | ||
| LeafOp leaf = 3; | ||
| repeated InnerOp path = 4; | ||
| } | ||
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| /* | ||
| NonExistenceProof takes a proof of two neighbors, one left of the desired key, | ||
| one right of the desired key. If both proofs are valid AND they are neighbors, | ||
| then there is no valid proof for the given key. | ||
| */ | ||
| message NonExistenceProof { | ||
| bytes key = 1; // TODO: remove this as unnecessary??? we prove a range | ||
| ExistenceProof left = 2; | ||
| ExistenceProof right = 3; | ||
| } | ||
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| /* | ||
| CommitmentProof is either an ExistenceProof or a NonExistenceProof, or a Batch of such messages | ||
| */ | ||
| message CommitmentProof { | ||
| oneof proof { | ||
| ExistenceProof exist = 1; | ||
| NonExistenceProof nonexist = 2; | ||
| BatchProof batch = 3; | ||
| CompressedBatchProof compressed = 4; | ||
| } | ||
| } | ||
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| /** | ||
| LeafOp represents the raw key-value data we wish to prove, and | ||
| must be flexible to represent the internal transformation from | ||
| the original key-value pairs into the basis hash, for many existing | ||
| merkle trees. | ||
| key and value are passed in. So that the signature of this operation is: | ||
| leafOp(key, value) -> output | ||
| To process this, first prehash the keys and values if needed (ANY means no hash in this case): | ||
| hkey = prehashKey(key) | ||
| hvalue = prehashValue(value) | ||
| Then combine the bytes, and hash it | ||
| output = hash(prefix || length(hkey) || hkey || length(hvalue) || hvalue) | ||
| */ | ||
| message LeafOp { | ||
| HashOp hash = 1; | ||
| HashOp prehash_key = 2; | ||
| HashOp prehash_value = 3; | ||
| LengthOp length = 4; | ||
| // prefix is a fixed bytes that may optionally be included at the beginning to differentiate | ||
| // a leaf node from an inner node. | ||
| bytes prefix = 5; | ||
| } | ||
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| /** | ||
| InnerOp represents a merkle-proof step that is not a leaf. | ||
| It represents concatenating two children and hashing them to provide the next result. | ||
| The result of the previous step is passed in, so the signature of this op is: | ||
| innerOp(child) -> output | ||
| The result of applying InnerOp should be: | ||
| output = op.hash(op.prefix || child || op.suffix) | ||
| where the || operator is concatenation of binary data, | ||
| and child is the result of hashing all the tree below this step. | ||
| Any special data, like prepending child with the length, or prepending the entire operation with | ||
| some value to differentiate from leaf nodes, should be included in prefix and suffix. | ||
| If either of prefix or suffix is empty, we just treat it as an empty string | ||
| */ | ||
| message InnerOp { | ||
| HashOp hash = 1; | ||
| bytes prefix = 2; | ||
| bytes suffix = 3; | ||
| } | ||
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| /** | ||
| ProofSpec defines what the expected parameters are for a given proof type. | ||
| This can be stored in the client and used to validate any incoming proofs. | ||
| verify(ProofSpec, Proof) -> Proof | Error | ||
| As demonstrated in tests, if we don't fix the algorithm used to calculate the | ||
| LeafHash for a given tree, there are many possible key-value pairs that can | ||
| generate a given hash (by interpretting the preimage differently). | ||
| We need this for proper security, requires client knows a priori what | ||
| tree format server uses. But not in code, rather a configuration object. | ||
| */ | ||
| message ProofSpec { | ||
| // any field in the ExistenceProof must be the same as in this spec. | ||
| // except Prefix, which is just the first bytes of prefix (spec can be longer) | ||
| LeafOp leaf_spec = 1; | ||
| InnerSpec inner_spec = 2; | ||
| // max_depth (if > 0) is the maximum number of InnerOps allowed (mainly for fixed-depth tries) | ||
| int32 max_depth = 3; | ||
| // min_depth (if > 0) is the minimum number of InnerOps allowed (mainly for fixed-depth tries) | ||
| int32 min_depth = 4; | ||
| } | ||
|
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| /* | ||
| InnerSpec contains all store-specific structure info to determine if two proofs from a | ||
| given store are neighbors. | ||
| This enables: | ||
| isLeftMost(spec: InnerSpec, op: InnerOp) | ||
| isRightMost(spec: InnerSpec, op: InnerOp) | ||
| isLeftNeighbor(spec: InnerSpec, left: InnerOp, right: InnerOp) | ||
| */ | ||
| message InnerSpec { | ||
| // Child order is the ordering of the children node, must count from 0 | ||
| // iavl tree is [0, 1] (left then right) | ||
| // merk is [0, 2, 1] (left, right, here) | ||
| repeated int32 child_order = 1; | ||
| int32 child_size = 2; | ||
| int32 min_prefix_length = 3; | ||
| int32 max_prefix_length = 4; | ||
| // empty child is the prehash image that is used when one child is nil (eg. 20 bytes of 0) | ||
| bytes empty_child = 5; | ||
| // hash is the algorithm that must be used for each InnerOp | ||
| HashOp hash = 6; | ||
| } | ||
|
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| /* | ||
| BatchProof is a group of multiple proof types than can be compressed | ||
| */ | ||
| message BatchProof { | ||
| repeated BatchEntry entries = 1; | ||
| } | ||
|
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| // Use BatchEntry not CommitmentProof, to avoid recursion | ||
| message BatchEntry { | ||
| oneof proof { | ||
| ExistenceProof exist = 1; | ||
| NonExistenceProof nonexist = 2; | ||
| } | ||
| } | ||
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| /****** all items here are compressed forms *******/ | ||
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| message CompressedBatchProof { | ||
| repeated CompressedBatchEntry entries = 1; | ||
| repeated InnerOp lookup_inners = 2; | ||
| } | ||
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| // Use BatchEntry not CommitmentProof, to avoid recursion | ||
| message CompressedBatchEntry { | ||
| oneof proof { | ||
| CompressedExistenceProof exist = 1; | ||
| CompressedNonExistenceProof nonexist = 2; | ||
| } | ||
| } | ||
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| message CompressedExistenceProof { | ||
| bytes key = 1; | ||
| bytes value = 2; | ||
| LeafOp leaf = 3; | ||
| // these are indexes into the lookup_inners table in CompressedBatchProof | ||
| repeated int32 path = 4; | ||
| } | ||
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| message CompressedNonExistenceProof { | ||
| bytes key = 1; // TODO: remove this as unnecessary??? we prove a range | ||
| CompressedExistenceProof left = 2; | ||
| CompressedExistenceProof right = 3; | ||
| } |
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