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pezkuwichain
31467f90d4
- @pezkuwi/papi-utils (rebrand of @polkadot-api/utils) - @pezkuwi/bizinikiwi-bindings (rebrand of @polkadot-api/substrate-bindings) - @pezkuwi/metadata-builders (rebrand of @polkadot-api/metadata-builders) - @pezkuwi/merkleize-metadata (rebrand of @polkadot-api/merkleize-metadata) All @polkadot-api references replaced with @pezkuwi equivalents.
47 lines
2.0 KiB
Markdown
47 lines
2.0 KiB
Markdown
# @polkadot-api/merkleize-metadata
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This TS package provides utils for the merkleization of [`frame_metadata`](https://docs.rs/frame-metadata/latest/frame_metadata/) as described in
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[RFC78](https://polkadot-fellows.github.io/RFCs/approved/0078-merkleized-metadata.html).
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## Usage
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```ts
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import { merkleizeMetadata } from "@polkadot-api/merkleized-metadata"
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const ksmMetadata = new Uint8Array(await readFile("ksm.bin"))
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const merkleizedMetadata = merkleizeMetadata(ksmMetadata, {
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decimals: 12,
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tokenSymbol: "KSM",
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})
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// it returns the digest value of the metadata (aka its merkleized root-hash)
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const rootHash = merkleizedMetadata.digest()
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// given an extrinsic, it returns an encoded `Proof`
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const proof1: Uint8Array = merkleizedMetadata.getProofForExtrinsic(
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// Hex for the transaction bytes
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"c10184008eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a4801127d333c8f60c0d81dd0a6e2e20ea477a06f96aaca1811872c54c244f0935c60b1f8a38aabef3d3a4ef4050d8d078e35b57b3cf4f9545f8145ce98afb8755384550000000000001448656c6c6f",
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// Optionally, we can pass the tx additional signed data
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"386d0f001a000000143c3561eefac7bc66facd4f0a7ec31d33b64f1827932fb3fda0ce361def535f143c3561eefac7bc66facd4f0a7ec31d33b64f1827932fb3fda0ce361def535f00",
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)
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// given the extrinsic "parts", it returns an encoded `Proof`
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const proof2: Uint8Array = merkleizedMetadata.getProofForExtrinsicParts(
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// Call data
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"0x040300648ad065ea416ca1725c29979cd41e288180f3e8aefde705cd3e0bab6cd212010bcb04fb711f01",
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// Signed Extension data included in the extrinsic
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"0x2503000000",
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// Signed Extension data included in the signature
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"0x164a0f001a000000b0a8d493285c2df73290dfb7e61f870f17b41801197a149ca93654499ea3dafe878a023bcb37967b6ba0685d002bb74e6cf3b4fc4ae37eb85f756bd9b026bede00",
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)
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// The type `Proof` definition is as follows:
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// interface Proof {
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// leaves: Array<LookupEntry>,
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// leafIdxs: Array<number>,
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// proofs: Array<Uint8Array>,
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// extrinsic: ExtrinsicMetadata,
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// info: ExtraInfo
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// }
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```
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