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Installation

npm install @sw4p/bridge

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Basic Usage

import { Sw4pBridge } from '@sw4p/bridge'

const bridge = new Sw4pBridge({ 
  apiKey: 'sk_...',
  debug: true
})

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Core Methods

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transfer()

Execute a cross-chain transfer. 
const result = await bridge.transfer({
  from: 'BASE',
  to: 'SOLANA',
  amount: '100.00',
  recipient: '5abc123...',
  permit: signedPermit
})

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estimateFee()

Get fee estimate before transfer. 
const estimate = await bridge.estimateFee({
  from: 'BASE',
  to: 'SOLANA',
  amount: '100.00'
})

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getStatus()

Check transfer status. 
const status = await bridge.getStatus('int_abc123')

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Solana Helpers

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createSolanaTransfer()

Build a Solana transaction for signing. 
const { transaction, intentId } = await bridge.createSolanaTransfer({
  to: 'BASE',
  amount: '100.00',
  fromWallet: publicKey.toBase58(),
  recipient: '0x...'
})

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submitSolanaTransfer()

Submit the signed transaction. 
const result = await bridge.submitSolanaTransfer({
  intentId,
  signedTransaction: Buffer.from(signed.serialize()).toString('base64')
})

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EVM Helpers

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createPermitTypedData()

Generate EIP-712 typed data for permit signing. 
const permitData = bridge.createPermitTypedData({
  chain: 'BASE',
  owner: '0x...',
  spender: '0x...',
  value: parseUnits('100', 6),
  nonce: 0n
})

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Error Handling

import { ApiError, AuthError, RateLimitError } from '@sw4p/bridge'

try {
  await bridge.transfer(params)
} catch (error) {
  if (error instanceof AuthError) {
    console.log('Invalid API key')
  } else if (error instanceof RateLimitError) {
    console.log(`Retry in ${error.retryAfterMs}ms`)
  }
}

npm

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GitHub

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