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2x 2x 2x 2x 2x 2x 2x 2x 4x 4x 4x 4x 4x 4x 4x 4x 3x 3x 3x 48x 3x 3x 3x 3x 15x 44x 44x 44x 44x 44x 1x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 2x 2x 2x 2x 5x 5x 5x 5x 3x 3x 2x 5x 1x 8x 8x 8x 8x 2x 8x 8x 8x 8x 8x 8x 1x 5x 5x 5x 5x 5x 2x 2x 5x 5x 5x 5x 5x 1x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 3x 3x 3x 3x 3x 3x 3x 3x 1x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 1x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 3x 3x 3x 3x 3x 3x 3x 1x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 1x 3x 3x 3x 3x 3x 3x 3x 1x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x | import { TransactionBuilder, payments, address as bjsAddress } from 'bitcoinjs-lib' import BN from 'bn.js' import { decodeB40, hash160, hash128, DUST_MINIMUM } from './utils' import { config } from '../config' // support v1 and v2 price API endpoint return values type AmountTypeV1 = number type AmountTypeV2 = { units: string, amount: BN } type AmountType = AmountTypeV1 | AmountTypeV2 // todo : add name length / character verification /** * @ignore */ export class BlockstackNamespace { namespaceID: string version: number lifetime: number coeff: number base: number buckets: Array<number> nonalphaDiscount: number noVowelDiscount: number constructor(namespaceID: string) { if (namespaceID.length > 19) { throw new Error('Namespace ID too long (19 chars max)') } if (!namespaceID.match('[0123456789abcdefghijklmnopqrstuvwxyz_-]+')) { throw new Error('Namespace ID can only use characters 0123456789abcdefghijklmnopqrstuvwxyz-_') } this.namespaceID = namespaceID this.version = -1 this.lifetime = -1 this.coeff = -1 this.base = -1 this.buckets = [-1] this.nonalphaDiscount = -1 this.noVowelDiscount = -1 } check() { try { this.setVersion(this.version) this.setLifetime(this.lifetime) this.setCoeff(this.coeff) this.setBase(this.base) this.setBuckets(this.buckets) this.setNonalphaDiscount(this.nonalphaDiscount) this.setNoVowelDiscount(this.noVowelDiscount) return true } catch (e) { return false } } setVersion(version: number) { if (version < 0 || version > 2 ** 16 - 1) { throw new Error('Invalid version: must be a 16-bit number') } this.version = version } setLifetime(lifetime: number) { if (lifetime < 0 || lifetime > 2 ** 32 - 1) { throw new Error('Invalid lifetime: must be a 32-bit number') } this.lifetime = lifetime } setCoeff(coeff: number) { if (coeff < 0 || coeff > 255) { throw new Error('Invalid coeff: must be an 8-bit number') } this.coeff = coeff } setBase(base: number) { if (base < 0 || base > 255) { throw new Error('Invalid base: must be an 8-bit number') } this.base = base } setBuckets(buckets: Array<number>) { if (buckets.length !== 16) { throw new Error('Invalid buckets: must have 16 entries') } for (let i = 0; i < buckets.length; i++) { if (buckets[i] < 0 || buckets[i] > 15) { throw new Error('Invalid buckets: must be 4-bit numbers') } } this.buckets = buckets.slice(0) } setNonalphaDiscount(nonalphaDiscount: number) { if (nonalphaDiscount <= 0 || nonalphaDiscount > 15) { throw new Error('Invalid nonalphaDiscount: must be a positive 4-bit number') } this.nonalphaDiscount = nonalphaDiscount } setNoVowelDiscount(noVowelDiscount: number) { if (noVowelDiscount <= 0 || noVowelDiscount > 15) { throw new Error('Invalid noVowelDiscount: must be a positive 4-bit number') } this.noVowelDiscount = noVowelDiscount } toHexPayload() { const lifeHex = `00000000${this.lifetime.toString(16)}`.slice(-8) const coeffHex = `00${this.coeff.toString(16)}`.slice(-2) const baseHex = `00${this.base.toString(16)}`.slice(-2) const bucketHex = this.buckets.map(b => b.toString(16)).reduce((b1, b2) => b1 + b2, '') const discountHex = this.nonalphaDiscount.toString(16) + this.noVowelDiscount.toString(16) const versionHex = `0000${this.version.toString(16)}`.slice(-4) const namespaceIDHex = Buffer.from(this.namespaceID).toString('hex') return lifeHex + coeffHex + baseHex + bucketHex + discountHex + versionHex + namespaceIDHex } } /** * @ignore */ function asAmountV2(amount: AmountType): AmountTypeV2 { // convert an AmountType v1 or v2 to an AmountTypeV2. // the "units" of a v1 amount type are always 'BTC' if (typeof amount === 'number') { return { units: 'BTC', amount: new BN(String(amount)) } } else { return { units: amount.units, amount: amount.amount } } } /** * @ignore */ function makeTXbuilder() { const txb = new TransactionBuilder(config.network.layer1) txb.setVersion(1) return txb } /** * @ignore */ function opEncode(opcode: string): string { // NOTE: must *always* a 3-character string const res = `${config.network.MAGIC_BYTES}${opcode}` if (res.length !== 3) { throw new Error('Runtime error: invalid MAGIC_BYTES') } return res } /** * @ignore */ export function makePreorderSkeleton( fullyQualifiedName: string, consensusHash: string, preorderAddress: string, burnAddress: string, burn: AmountType, registerAddress: string = null ) { // Returns a preorder tx skeleton. // with 3 outputs : 1. the Blockstack Preorder OP_RETURN data // 2. the Preorder's change address (5500 satoshi minimum) // 3. the BURN // // 0 2 3 23 39 47 66 // |-----|--|--------------------------------------|--------------|-----------|-------------| // magic op hash160(fqn,scriptPubkey,registerAddr) consensus hash token burn token type // (optional) (optional) // // output 0: name preorder code // output 1: preorder address // output 2: burn address // // Returns an unsigned serialized transaction. const burnAmount = asAmountV2(burn) const network = config.network const nameBuff = Buffer.from(decodeB40(fullyQualifiedName), 'hex') // base40 const scriptPublicKey = bjsAddress.toOutputScript(preorderAddress, network.layer1) const dataBuffers = [nameBuff, scriptPublicKey] if (!!registerAddress) { const registerBuff = Buffer.from(registerAddress, 'ascii') dataBuffers.push(registerBuff) } const dataBuff = Buffer.concat(dataBuffers) const hashed = hash160(dataBuff) const opReturnBufferLen = burnAmount.units === 'BTC' ? 39 : 66 const opReturnBuffer = Buffer.alloc(opReturnBufferLen) opReturnBuffer.write(opEncode('?'), 0, 3, 'ascii') hashed.copy(opReturnBuffer, 3) opReturnBuffer.write(consensusHash, 23, 16, 'hex') if (burnAmount.units !== 'BTC') { const burnHex = burnAmount.amount.toString(16, 2) if (burnHex.length > 16) { // exceeds 2**64; can't fit throw new Error(`Cannot preorder '${fullyQualifiedName}': cannot fit price into 8 bytes`) } const paddedBurnHex = `0000000000000000${burnHex}`.slice(-16) opReturnBuffer.write(paddedBurnHex, 39, 8, 'hex') opReturnBuffer.write(burnAmount.units, 47, burnAmount.units.length, 'ascii') } const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) tx.addOutput(preorderAddress, DUST_MINIMUM) if (burnAmount.units === 'BTC') { const btcBurnAmount = burnAmount.amount.toNumber() tx.addOutput(burnAddress, btcBurnAmount) } else { tx.addOutput(burnAddress, DUST_MINIMUM) } return tx.buildIncomplete() } /** * @ignore */ export function makeRegisterSkeleton( fullyQualifiedName: string, ownerAddress: string, valueHash: string = null, burnTokenAmountHex: string = null ) { // Returns a register tx skeleton. // with 2 outputs : 1. The register OP_RETURN // 2. The owner address (can be different from REGISTER address on renewals) // You MUST make the first input a UTXO from the current OWNER *or* the // funder of the PREORDER // in the case of a renewal, this would need to be modified to include a change address // as output (3) before the burn output (4) /* Formats No zonefile hash, and pay with BTC: 0 2 3 39 |----|--|----------------------------------| magic op name.ns_id (up to 37 bytes) With zonefile hash, and pay with BTC: 0 2 3 39 59 |----|--|----------------------------------|-------------------| magic op name.ns_id (37 bytes, 0-padded) zone file hash output 0: name registration code output 1: owner address */ let payload if (!!burnTokenAmountHex && !valueHash) { // empty value hash valueHash = '0000000000000000000000000000000000000000' } if (!!valueHash) { if (valueHash.length !== 40) { throw new Error('Value hash length incorrect. Expecting 20-bytes, hex-encoded') } if (!!burnTokenAmountHex) { if (burnTokenAmountHex.length !== 16) { throw new Error('Burn field length incorrect. Expecting 8-bytes, hex-encoded') } } const payloadLen = burnTokenAmountHex ? 65 : 57 payload = Buffer.alloc(payloadLen, 0) payload.write(fullyQualifiedName, 0, 37, 'ascii') payload.write(valueHash, 37, 20, 'hex') if (!!burnTokenAmountHex) { payload.write(burnTokenAmountHex, 57, 8, 'hex') } } else { payload = Buffer.from(fullyQualifiedName, 'ascii') } const opReturnBuffer = Buffer.concat([Buffer.from(opEncode(':'), 'ascii'), payload]) const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) tx.addOutput(ownerAddress, DUST_MINIMUM) return tx.buildIncomplete() } /** * @ignore */ export function makeRenewalSkeleton( fullyQualifiedName: string, nextOwnerAddress: string, lastOwnerAddress: string, burnAddress: string, burn: AmountType, valueHash: string = null ) { /* Formats No zonefile hash, and pay with BTC: 0 2 3 39 |----|--|----------------------------------| magic op name.ns_id (up to 37 bytes) With zonefile hash, and pay with BTC: 0 2 3 39 59 |----|--|----------------------------------|-------------------| magic op name.ns_id (37 bytes, 0-padded) zone file hash With renewal payment in a token: (for register, tokens burned is not included) (for renew, tokens burned is the number of tokens to burn) 0 2 3 39 59 67 |----|--|----------------------------------|-------------------|------------------------------| magic op name.ns_id (37 bytes, 0-padded) zone file hash tokens burned (big-endian) output 0: renewal code output 1: new owner address output 2: current owner address output 3: burn address */ const burnAmount = asAmountV2(burn) const network = config.network const burnTokenAmount = burnAmount.units === 'BTC' ? null : burnAmount.amount const burnBTCAmount = burnAmount.units === 'BTC' ? burnAmount.amount.toNumber() : DUST_MINIMUM let burnTokenHex = null if (!!burnTokenAmount) { const burnHex = burnTokenAmount.toString(16, 2) if (burnHex.length > 16) { // exceeds 2**64; can't fit throw new Error(`Cannot renew '${fullyQualifiedName}': cannot fit price into 8 bytes`) } burnTokenHex = `0000000000000000${burnHex}`.slice(-16) } const registerTX = makeRegisterSkeleton( fullyQualifiedName, nextOwnerAddress, valueHash, burnTokenHex ) const txB = TransactionBuilder.fromTransaction( registerTX, network.layer1 ) txB.addOutput(lastOwnerAddress, DUST_MINIMUM) txB.addOutput(burnAddress, burnBTCAmount) return txB.buildIncomplete() } /** * @ignore */ export function makeTransferSkeleton( fullyQualifiedName: string, consensusHash: string, newOwner: string, keepZonefile: boolean = false ) { // Returns a transfer tx skeleton. // with 2 outputs : 1. the Blockstack Transfer OP_RETURN data // 2. the new owner with a DUST_MINIMUM value (5500 satoshi) // // You MUST make the first input a UTXO from the current OWNER // // Returns an unsigned serialized transaction. /* Format 0 2 3 4 20 36 |-----|--|----|-------------------|---------------| magic op keep hash128(name.ns_id) consensus hash data? output 0: transfer code output 1: new owner */ const opRet = Buffer.alloc(36) let keepChar = '~' if (keepZonefile) { keepChar = '>' } opRet.write(opEncode('>'), 0, 3, 'ascii') opRet.write(keepChar, 3, 1, 'ascii') const hashed = hash128(Buffer.from(fullyQualifiedName, 'ascii')) hashed.copy(opRet, 4) opRet.write(consensusHash, 20, 16, 'hex') const opRetPayload = payments.embed({ data: [opRet] }).output const tx = makeTXbuilder() tx.addOutput(opRetPayload, 0) tx.addOutput(newOwner, DUST_MINIMUM) return tx.buildIncomplete() } /** * @ignore */ export function makeUpdateSkeleton( fullyQualifiedName: string, consensusHash: string, valueHash: string ) { // Returns an update tx skeleton. // with 1 output : 1. the Blockstack update OP_RETURN // // You MUST make the first input a UTXO from the current OWNER // // Returns an unsigned serialized transaction. // // output 0: the revoke code /* Format: 0 2 3 19 39 |-----|--|-----------------------------------|-----------------------| magic op hash128(name.ns_id,consensus hash) hash160(data) output 0: update code */ const opRet = Buffer.alloc(39) const nameBuff = Buffer.from(fullyQualifiedName, 'ascii') const consensusBuff = Buffer.from(consensusHash, 'ascii') const hashedName = hash128(Buffer.concat( [nameBuff, consensusBuff] )) opRet.write(opEncode('+'), 0, 3, 'ascii') hashedName.copy(opRet, 3) opRet.write(valueHash, 19, 20, 'hex') const opRetPayload = payments.embed({ data: [opRet] }).output const tx = makeTXbuilder() tx.addOutput(opRetPayload, 0) return tx.buildIncomplete() } /** * @ignore */ export function makeRevokeSkeleton(fullyQualifiedName: string) { // Returns a revoke tx skeleton // with 1 output: 1. the Blockstack revoke OP_RETURN // // You MUST make the first input a UTXO from the current OWNER // // Returns an unsigned serialized transaction /* Format: 0 2 3 39 |----|--|-----------------------------| magic op name.ns_id (37 bytes) output 0: the revoke code */ const opRet = Buffer.alloc(3) const nameBuff = Buffer.from(fullyQualifiedName, 'ascii') opRet.write(opEncode('~'), 0, 3, 'ascii') const opReturnBuffer = Buffer.concat([opRet, nameBuff]) const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) return tx.buildIncomplete() } /** * @ignore */ export function makeNamespacePreorderSkeleton( namespaceID: string, consensusHash: string, preorderAddress: string, registerAddress: string, burn: AmountType ) { // Returns a namespace preorder tx skeleton. // Returns an unsigned serialized transaction. /* Formats: Without STACKS: 0 2 3 23 39 |-----|---|--------------------------------------|----------------| magic op hash(ns_id,script_pubkey,reveal_addr) consensus hash with STACKs: 0 2 3 23 39 47 |-----|---|--------------------------------------|----------------|--------------------------| magic op hash(ns_id,script_pubkey,reveal_addr) consensus hash token fee (big-endian) output 0: namespace preorder code output 1: change address otuput 2: burn address */ const burnAmount = asAmountV2(burn) if (burnAmount.units !== 'BTC' && burnAmount.units !== 'STACKS') { throw new Error(`Invalid burnUnits ${burnAmount.units}`) } const network = config.network const burnAddress = network.getDefaultBurnAddress() const namespaceIDBuff = Buffer.from(decodeB40(namespaceID), 'hex') // base40 const scriptPublicKey = bjsAddress.toOutputScript(preorderAddress, network.layer1) const registerBuff = Buffer.from(registerAddress, 'ascii') const dataBuffers = [namespaceIDBuff, scriptPublicKey, registerBuff] const dataBuff = Buffer.concat(dataBuffers) const hashed = hash160(dataBuff) let btcBurnAmount = DUST_MINIMUM let opReturnBufferLen = 39 if (burnAmount.units === 'STACKS') { opReturnBufferLen = 47 } else { btcBurnAmount = burnAmount.amount.toNumber() } const opReturnBuffer = Buffer.alloc(opReturnBufferLen) opReturnBuffer.write(opEncode('*'), 0, 3, 'ascii') hashed.copy(opReturnBuffer, 3) opReturnBuffer.write(consensusHash, 23, 16, 'hex') if (burnAmount.units === 'STACKS') { const burnHex = burnAmount.amount.toString(16, 2) const paddedBurnHex = `0000000000000000${burnHex}`.slice(-16) opReturnBuffer.write(paddedBurnHex, 39, 8, 'hex') } const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) tx.addOutput(preorderAddress, DUST_MINIMUM) tx.addOutput(burnAddress, btcBurnAmount) return tx.buildIncomplete() } /** * @ignore */ export function makeNamespaceRevealSkeleton( namespace: BlockstackNamespace, revealAddress: string ) { /* Format: 0 2 3 7 8 9 10 11 12 13 14 15 16 17 18 20 39 |-----|---|----|-----|-----|----|----|----|----|----|-----|-----|-----|--------|-------|-------| magic op life coeff. base 1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16 nonalpha version ns ID bucket exponents no-vowel discounts output 0: namespace reveal code output 1: reveal address */ const hexPayload = namespace.toHexPayload() const opReturnBuffer = Buffer.alloc(3 + hexPayload.length / 2) opReturnBuffer.write(opEncode('&'), 0, 3, 'ascii') opReturnBuffer.write(hexPayload, 3, hexPayload.length / 2, 'hex') const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) tx.addOutput(revealAddress, DUST_MINIMUM) return tx.buildIncomplete() } /** * @ignore */ export function makeNamespaceReadySkeleton(namespaceID: string) { /* Format: 0 2 3 4 23 |-----|--|--|------------| magic op . ns_id output 0: namespace ready code */ const opReturnBuffer = Buffer.alloc(3 + namespaceID.length + 1) opReturnBuffer.write(opEncode('!'), 0, 3, 'ascii') opReturnBuffer.write(`.${namespaceID}`, 3, namespaceID.length + 1, 'ascii') const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) return tx.buildIncomplete() } // type bitcoin.payments.p2data bitcoin.payments.embed /** * @ignore */ export function makeNameImportSkeleton(name: string, recipientAddr: string, zonefileHash: string) { /* Format: 0 2 3 39 |----|--|-----------------------------| magic op name.ns_id (37 bytes) Output 0: the OP_RETURN Output 1: the recipient Output 2: the zonefile hash */ if (zonefileHash.length !== 40) { throw new Error('Invalid zonefile hash: must be 20 bytes hex-encoded') } const network = config.network const opReturnBuffer = Buffer.alloc(3 + name.length) opReturnBuffer.write(opEncode(';'), 0, 3, 'ascii') opReturnBuffer.write(name, 3, name.length, 'ascii') const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() const zonefileHashB58 = bjsAddress.toBase58Check( Buffer.from(zonefileHash, 'hex'), network.layer1.pubKeyHash ) tx.addOutput(nullOutput, 0) tx.addOutput(recipientAddr, DUST_MINIMUM) tx.addOutput(zonefileHashB58, DUST_MINIMUM) return tx.buildIncomplete() } /** * @ignore */ export function makeAnnounceSkeleton(messageHash: string) { /* Format: 0 2 3 23 |----|--|-----------------------------| magic op message hash (160-bit) output 0: the OP_RETURN */ if (messageHash.length !== 40) { throw new Error('Invalid message hash: must be 20 bytes hex-encoded') } const opReturnBuffer = Buffer.alloc(3 + messageHash.length / 2) opReturnBuffer.write(opEncode('#'), 0, 3, 'ascii') opReturnBuffer.write(messageHash, 3, messageHash.length / 2, 'hex') const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) return tx.buildIncomplete() } /** * @ignore */ export function makeTokenTransferSkeleton(recipientAddress: string, consensusHash: string, tokenType: string, tokenAmount: BN, scratchArea: string ) { /* Format: 0 2 3 19 38 46 80 |-----|--|--------------|----------|-----------|-------------------------| magic op consensus_hash token_type amount (BE) scratch area (ns_id) output 0: token transfer code output 1: recipient address */ if (scratchArea.length > 34) { throw new Error('Invalid scratch area: must be no more than 34 bytes') } const opReturnBuffer = Buffer.alloc(46 + scratchArea.length) const tokenTypeHex = Buffer.from(tokenType).toString('hex') const tokenTypeHexPadded = `00000000000000000000000000000000000000${tokenTypeHex}`.slice(-38) const tokenValueHex = tokenAmount.toString(16, 2) if (tokenValueHex.length > 16) { // exceeds 2**64; can't fit throw new Error(`Cannot send tokens: cannot fit ${tokenAmount.toString()} into 8 bytes`) } const tokenValueHexPadded = `0000000000000000${tokenValueHex}`.slice(-16) opReturnBuffer.write(opEncode('$'), 0, 3, 'ascii') opReturnBuffer.write(consensusHash, 3, consensusHash.length / 2, 'hex') opReturnBuffer.write(tokenTypeHexPadded, 19, tokenTypeHexPadded.length / 2, 'hex') opReturnBuffer.write(tokenValueHexPadded, 38, tokenValueHexPadded.length / 2, 'hex') opReturnBuffer.write(scratchArea, 46, scratchArea.length, 'ascii') const nullOutput = payments.embed({ data: [opReturnBuffer] }).output const tx = makeTXbuilder() tx.addOutput(nullOutput, 0) tx.addOutput(recipientAddress, DUST_MINIMUM) return tx.buildIncomplete() } |