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chore: move from cip14lib to own func for AssetFingerprint
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| // Copy pasted from https://github.com/Emurgo/cip14-js due to ESM issues with the lib | ||
| import blake2b from 'blake2b'; | ||
| import { bech32 } from 'bech32'; | ||
|
|
||
| /// note: this function can't be inverted due to the hash | ||
|
|
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| const DATA = 'asset'; | ||
|
|
||
| export class AssetFingerprint { | ||
| readonly hashBuf: Uint8Array; | ||
|
|
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| private constructor(hashBuf: Uint8Array) { | ||
| this.hashBuf = hashBuf; | ||
| } | ||
|
|
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| static fromHash(hash: Uint8Array): AssetFingerprint { | ||
| return new AssetFingerprint(hash); | ||
| } | ||
|
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| static fromParts(policyId: Uint8Array, assetName: Uint8Array): AssetFingerprint { | ||
| // see https://github.com/cardano-foundation/CIPs/pull/64 | ||
| const hashBuf = blake2b(20) | ||
| .update(new Uint8Array([...policyId, ...assetName])) | ||
| .digest('binary'); | ||
|
|
||
| return AssetFingerprint.fromHash(hashBuf); | ||
| } | ||
|
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| static fromBech32(fingerprint: string): AssetFingerprint { | ||
| const { prefix, words } = bech32.decode(fingerprint); | ||
|
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| if (prefix !== DATA) { | ||
| throw new Error('Invalid asset fingerprint'); | ||
| } | ||
|
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||
| const hashBuf = Buffer.from(bech32.fromWords(words)); | ||
|
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| return AssetFingerprint.fromHash(hashBuf); | ||
| } | ||
|
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| fingerprint(): string { | ||
| const words = bech32.toWords(this.hashBuf); | ||
|
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| return bech32.encode(DATA, words); | ||
| } | ||
|
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| hash(): string { | ||
| return Buffer.from(this.hashBuf).toString('hex'); | ||
| } | ||
|
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| prefix(): string { | ||
| return DATA; | ||
| } | ||
|
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| // The last six characters of the data part form a checksum and contain no information | ||
| checksum(): string { | ||
| return this.fingerprint().slice(-6); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| import { AssetFingerprint } from '../../../../src/utils/cip14.js'; | ||
| import { describe, expect, test } from 'vitest'; | ||
|
|
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| function createFingerprint(policyId: string, assetName: string): string { | ||
| const fingerprint = AssetFingerprint.fromParts( | ||
| Buffer.from(policyId, 'hex'), | ||
| Buffer.from(assetName, 'hex'), | ||
| ); | ||
|
|
||
| return fingerprint.fingerprint(); | ||
| } | ||
|
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||
| describe('cip14', () => { | ||
| test('Fingerprint is correctly generated', () => { | ||
| expect( | ||
| createFingerprint('7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', ''), | ||
| ).toEqual('asset1rjklcrnsdzqp65wjgrg55sy9723kw09mlgvlc3'); | ||
|
|
||
| expect( | ||
| createFingerprint('7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc37e', ''), | ||
| ).toEqual('asset1nl0puwxmhas8fawxp8nx4e2q3wekg969n2auw3'); | ||
|
|
||
| expect( | ||
| createFingerprint('1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', ''), | ||
| ).toEqual('asset1uyuxku60yqe57nusqzjx38aan3f2wq6s93f6ea'); | ||
|
|
||
| expect( | ||
| createFingerprint('7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', '504154415445'), | ||
| ).toEqual('asset13n25uv0yaf5kus35fm2k86cqy60z58d9xmde92'); | ||
|
|
||
| expect( | ||
| createFingerprint('1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', '504154415445'), | ||
| ).toEqual('asset1hv4p5tv2a837mzqrst04d0dcptdjmluqvdx9k3'); | ||
|
|
||
| expect( | ||
| createFingerprint( | ||
| '1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', | ||
| '7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', | ||
| ), | ||
| ).toEqual('asset1aqrdypg669jgazruv5ah07nuyqe0wxjhe2el6f'); | ||
|
|
||
| expect( | ||
| createFingerprint( | ||
| '7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', | ||
| '1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', | ||
| ), | ||
| ).toEqual('asset17jd78wukhtrnmjh3fngzasxm8rck0l2r4hhyyt'); | ||
|
|
||
| expect( | ||
| createFingerprint( | ||
| '7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', | ||
| '0000000000000000000000000000000000000000000000000000000000000000', | ||
| ), | ||
| ).toEqual('asset1pkpwyknlvul7az0xx8czhl60pyel45rpje4z8w'); | ||
| }); | ||
|
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||
| function roundtripFromHash(policyId: string, assetName: string): string { | ||
| const fingerprint = AssetFingerprint.fromParts( | ||
| Buffer.from(policyId, 'hex'), | ||
| Buffer.from(assetName, 'hex'), | ||
| ); | ||
|
|
||
| const hash = Buffer.from(fingerprint.hash(), 'hex'); | ||
|
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| const reconstructed = AssetFingerprint.fromHash(hash); | ||
|
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| return reconstructed.fingerprint(); | ||
| } | ||
| test('Can generate fingerprint with hash', () => { | ||
| expect( | ||
| roundtripFromHash('7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', ''), | ||
| ).toEqual('asset1rjklcrnsdzqp65wjgrg55sy9723kw09mlgvlc3'); | ||
|
|
||
| expect( | ||
| roundtripFromHash('7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc37e', ''), | ||
| ).toEqual('asset1nl0puwxmhas8fawxp8nx4e2q3wekg969n2auw3'); | ||
|
|
||
| expect( | ||
| roundtripFromHash('1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', ''), | ||
| ).toEqual('asset1uyuxku60yqe57nusqzjx38aan3f2wq6s93f6ea'); | ||
|
|
||
| expect( | ||
| roundtripFromHash('7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', '504154415445'), | ||
| ).toEqual('asset13n25uv0yaf5kus35fm2k86cqy60z58d9xmde92'); | ||
|
|
||
| expect( | ||
| roundtripFromHash('1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', '504154415445'), | ||
| ).toEqual('asset1hv4p5tv2a837mzqrst04d0dcptdjmluqvdx9k3'); | ||
|
|
||
| expect( | ||
| roundtripFromHash( | ||
| '1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', | ||
| '7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', | ||
| ), | ||
| ).toEqual('asset1aqrdypg669jgazruv5ah07nuyqe0wxjhe2el6f'); | ||
|
|
||
| expect( | ||
| roundtripFromHash( | ||
| '7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', | ||
| '1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', | ||
| ), | ||
| ).toEqual('asset17jd78wukhtrnmjh3fngzasxm8rck0l2r4hhyyt'); | ||
|
|
||
| expect( | ||
| roundtripFromHash( | ||
| '7eae28af2208be856f7a119668ae52a49b73725e326dc16579dcc373', | ||
| '0000000000000000000000000000000000000000000000000000000000000000', | ||
| ), | ||
| ).toEqual('asset1pkpwyknlvul7az0xx8czhl60pyel45rpje4z8w'); | ||
| }); | ||
|
|
||
| test('can get hash from bech32', () => { | ||
| expect( | ||
| AssetFingerprint.fromBech32('asset1rjklcrnsdzqp65wjgrg55sy9723kw09mlgvlc3').hash(), | ||
| ).toEqual('1cadfc0e7068801d51d240d14a4085f2a3673cbb'); | ||
|
|
||
| expect( | ||
| AssetFingerprint.fromBech32('asset1nl0puwxmhas8fawxp8nx4e2q3wekg969n2auw3').hash(), | ||
| ).toEqual('9fde1e38dbbf6074f5c609e66ae5408bb3641745'); | ||
|
|
||
| expect( | ||
| AssetFingerprint.fromBech32('asset1uyuxku60yqe57nusqzjx38aan3f2wq6s93f6ea').hash(), | ||
| ).toEqual('e1386b734f20334f4f9000a4689fbd9c52a70350'); | ||
| }); | ||
|
|
||
| test('can get checksum from bech32', () => { | ||
| expect( | ||
| AssetFingerprint.fromBech32('asset1rjklcrnsdzqp65wjgrg55sy9723kw09mlgvlc3').checksum(), | ||
| ).toEqual('lgvlc3'); | ||
|
|
||
| expect( | ||
| AssetFingerprint.fromBech32('asset1nl0puwxmhas8fawxp8nx4e2q3wekg969n2auw3').checksum(), | ||
| ).toEqual('n2auw3'); | ||
|
|
||
| expect( | ||
| AssetFingerprint.fromBech32('asset1uyuxku60yqe57nusqzjx38aan3f2wq6s93f6ea').checksum(), | ||
| ).toEqual('93f6ea'); | ||
| }); | ||
| }); |
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