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Required scopes: checkout_read
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String!
required
The custom rate contract every script is checked against.
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String!
required
A representative Input value as JSON, showing the cart, destination, origin, and coverage data the script receives.
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CustomShippingMethodSource
The requested method’s current code. Null when no method was requested.
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String!
required
A minimal working script to start a new custom method from.
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String!
required
TypeScript declarations of the contract: Input, Output, and the ambient money helper. Code that does not type-check against these is rejected on write.