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c-kzg-4844
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Nim: better handling of trusted setup (#231)

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andri lim 2023-03-21 09:30:50 +07:00 committed by GitHub
parent b7902b2300
commit bf99ed5b91
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3 changed files with 22 additions and 4 deletions
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3
bindings/nim/kzg.nim
View File

@ -208,6 +208,9 @@ proc verifyProofs*(ctx: KzgCtx,
template loadTrustedSetupFile*(input: File | string): untyped = template loadTrustedSetupFile*(input: File | string): untyped =
loadTrustedSetup(input) loadTrustedSetup(input)
template freeTrustedSetup*(ctx: KzgCtx) =
free_trusted_setup(ctx.val)
template blobToKzgCommitment*(ctx: KzgCtx, template blobToKzgCommitment*(ctx: KzgCtx,
blob: KzgBlob): untyped = blob: KzgBlob): untyped =
toCommitment(ctx, blob) toCommitment(ctx, blob)

16
bindings/nim/kzg_ex.nim
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@ -22,12 +22,16 @@ else:
# Private helpers # Private helpers
############################################################## ##############################################################
var gCtx: KzgCtx var gCtx = KzgCtx(nil)
const const
GlobalCtxErr = "kzg global context not loaded" TrustedSetupNotLoadedErr = "Trusted setup not loaded."
TrustedSetupAlreadyLoadedErr =
"Trusted setup is already loaded. Free it before loading a new one."
template setupCtx(body: untyped): untyped = template setupCtx(body: untyped): untyped =
if not gCtx.isNil:
return err(TrustedSetupAlreadyLoadedErr)
let res = body let res = body
if res.isErr: if res.isErr:
return err(res.error) return err(res.error)
@ -37,7 +41,7 @@ template setupCtx(body: untyped): untyped =
template verifyCtx(body: untyped): untyped = template verifyCtx(body: untyped): untyped =
{.gcsafe.}: {.gcsafe.}:
if gCtx.isNil: if gCtx.isNil:
return err(GlobalCtxErr) return err(TrustedSetupNotLoadedErr)
body body
############################################################## ##############################################################
@ -65,6 +69,12 @@ proc loadTrustedSetupFromString*(_: type Kzg,
setupCtx: setupCtx:
kzg.loadTrustedSetupFromString(input) kzg.loadTrustedSetupFromString(input)
proc freeTrustedSetup*(_: type Kzg): Result[void, string] =
verifyCtx:
gCtx.freeTrustedSetup()
gCtx = nil
ok()
proc toCommitment*(blob: KzgBlob): proc toCommitment*(blob: KzgBlob):
Result[KzgCommitment, string] {.gcsafe.} = Result[KzgCommitment, string] {.gcsafe.} =
verifyCtx: verifyCtx:

7
bindings/nim/tests/test_kzg_ex.nim
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@ -75,7 +75,8 @@ suite "verify proof (extended version)":
test "template aliases": test "template aliases":
# no need to check return value # no need to check return value
# only test if those templates can be compiled succesfully # only test if those templates can be compiled succesfully
discard Kzg.loadTrustedSetupFile(trustedSetupFile) check Kzg.freeTrustedSetup().isOk
check Kzg.loadTrustedSetupFile(trustedSetupFile).isOk
discard blobToKzgCommitment(blob) discard blobToKzgCommitment(blob)
let kp = computeKzgProof(blob, inputPoint) let kp = computeKzgProof(blob, inputPoint)
discard computeBlobKzgProof(blob, commitment) discard computeBlobKzgProof(blob, commitment)
@ -83,3 +84,7 @@ suite "verify proof (extended version)":
discard verifyBlobKzgProof(blob, commitment, proof) discard verifyBlobKzgProof(blob, commitment, proof)
let kb = createKateBlobs(1) let kb = createKateBlobs(1)
discard verifyBlobKzgProofBatch(kb.blobs, kb.kates, [kp.get.proof]) discard verifyBlobKzgProofBatch(kb.blobs, kb.kates, [kp.get.proof])
test "load trusted setup more than once":
let res = Kzg.loadTrustedSetupFromString(trustedSetup)
check res.isErr