The Write API provides endpoints for managing blockchain transactions. These endpoints handle transaction encoding, validation, and broadcasting across all supported networks.

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Transaction Lifecycle

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1. Transaction Encoding

The /api/transaction/encode endpoint streamlines transaction creation by:
  • Validating input parameters
  • Calculating fees and gas estimates
  • Applying chain-specific rules
  • Preparing the transaction for signing

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2. Transaction Validation

The validation endpoint helps verify transactions before broadcasting:
  • Checks transaction structure
  • Validates sender’s balance
  • Verifies chain-specific requirements

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3. Transaction Broadcasting

Two options for broadcasting transactions:
  • Standard Broadcast (POST /api/transaction/broadcast): For regular signed transactions
  • Raw Broadcast (POST /api/transaction/broadcast/raw): For pre-formatted transaction payloads

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Supported Transaction Types

The API supports various transaction types across chains:
  • Native Transfers: Send native blockchain currency
  • Token Transfers: Handle ERC20 and other token standards
  • Staking Operations: Delegate, redelegate, undelegate, and claim rewards
Each chain may support different transaction types. Use the /api/chains endpoint to check supported features for any chains.

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Chain-Specific Features

The Write API adapts to each blockchain’s capabilities: 
{
  "write": {
    "transaction": {
      "type": {
        "native": true, // Native currency transfers
        "tokens": true, // Token operations
        "staking": true // Staking operations
      },
      "field": {
        "memo": true // Optional transaction memo support
      }
    }
  }
}

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Error Handling

The API provides detailed error feedback:
  • Pre-broadcast validation errors
  • Chain-specific rejection reasons
  • Broadcasting status and confirmation details
For implementation details, refer to: